Advanced interactive segment control with CSS Anchor-based sliding pill highlights and SVG knockout mask filters.

Advanced Sliding Radio Pill Selector with CSS Anchor

This highly advanced segment controller showcases state-of-the-art interactive transitions. It demonstrates two distinct animations: a directional elastic hop and an SVG-masked CSS Anchor Positioning slide. When anchoring is active, a custom feColorMatrix filter punches out the text, leaving an inverted, color-shifting cutout inside the sliding pill without duplicating HTML nodes. (Requires: gsap.js, gsap-draggable.js, tweakpane.js)

Technologies:
SVG HTML CSS JavaScript
Difficulty: Advanced
Browser Support (as of Jul 2026):
Chrome Chrome Edge Edge Firefox Firefox Safari Safari
Features:
CSS Anchor Positioning Sliding Pill Animations SVG Knockout Masking Tweakpane Control
Code by: Jhey Jhey
License: MIT
Loading...
<svg class="sr-only">
      <filter id="knockout-black" colorInterpolationFilters="sRGB">
        <feColorMatrix
          type="matrix"
          values="1 0 0 0 0
                  0 1 0 0 0
                  0 0 1 0 0
                  -1 -1 -1 0 1"
        />
        <feComposite in="SourceGraphic" operator="out" />
      </filter>
      <filter id="knockout-white" colorInterpolationFilters="sRGB">
        <feColorMatrix
          type="matrix"
          values="1 0 0 0 0
                  0 1 0 0 0
                  0 0 1 0 0
                  1 1 1 0 0"
        />
        <feComposite in="SourceGraphic" operator="out" />
      </filter>
    </svg>
    <div class="resize-container">
    </div>
    <svg class="svg-mask" xmlns="http://www.w3.org/2000/svg"></svg>
    <a
      aria-label="Follow Jhey"
      class="bear-link"
      href="https://twitter.com/intent/follow?screen_name=jh3yy"
      target="_blank"
      rel="noreferrer noopener"
    >
      <svg
        class="w-9"
        viewBox="0 0 969 955"
        fill="none"
        xmlns="http://www.w3.org/2000/svg"
      >
        <circle
          cx="161.191"
          cy="320.191"
          r="133.191"
          stroke="currentColor"
          stroke-width="20"
        ></circle>
        <circle
          cx="806.809"
          cy="320.191"
          r="133.191"
          stroke="currentColor"
          stroke-width="20"
        ></circle>
        <circle
          cx="695.019"
          cy="587.733"
          r="31.4016"
          fill="currentColor"
        ></circle>
        <circle
          cx="272.981"
          cy="587.733"
          r="31.4016"
          fill="currentColor"
        ></circle>
        <path
          d="M564.388 712.083C564.388 743.994 526.035 779.911 483.372 779.911C440.709 779.911 402.356 743.994 402.356 712.083C402.356 680.173 440.709 664.353 483.372 664.353C526.035 664.353 564.388 680.173 564.388 712.083Z"
          fill="currentColor"
        ></path>
        <rect
          x="310.42"
          y="448.31"
          width="343.468"
          height="51.4986"
          fill="#FF1E1E"
        ></rect>
        <path
          fill-rule="evenodd"
          clip-rule="evenodd"
          d="M745.643 288.24C815.368 344.185 854.539 432.623 854.539 511.741H614.938V454.652C614.938 433.113 597.477 415.652 575.938 415.652H388.37C366.831 415.652 349.37 433.113 349.37 454.652V511.741L110.949 511.741C110.949 432.623 150.12 344.185 219.845 288.24C289.57 232.295 384.138 200.865 482.744 200.865C581.35 200.865 675.918 232.295 745.643 288.24Z"
          fill="currentColor"
        ></path>
      </svg>
    </a>
@import url('https://unpkg.com/normalize.css') layer(normalize);
@import url('https://fonts.googleapis.com/css2?family=Gloria+Hallelujah&display=swap');

@layer normalize, base, prototype, anchor, hop, knockout;

@layer knockout {
  .svg-mask {
    outline-offset: -2px;
    position: absolute;
    inset: 0;
    height: 100%;
    width: 100%;
    pointer-events: none;
    z-index: 2;
    translate: 0 100%;
  }

  [data-knockout='mask'][data-style='anchor'] fieldset:first-of-type > div {
    -webkit-mask: var(--svg-mask, initial);
            mask: var(--svg-mask, initial);
  }

  [data-knockout='none'] .mask-layer,
  [data-knockout='mask'] .mask-layer {
    display: none;
  }
  [data-knockout='filter'][data-style='anchor'] {
    .mask-layer {
      filter: url(#knockout-black);
    }
    @media (prefers-color-scheme: dark) {
      .mask-layer {
        filter: url(#knockout-white);
      }
    }
  }
}

@layer hop {
  [data-match='true'][data-style='hop'] {
    label::before {
      inset: unset;
      top: 0;
      left: 0;
      bottom: 0;
      width: max(var(--pill-width-current, 100%), var(--pill-width-previous, 100%));
    }
    label:has(+ :not(:checked) ~ :checked)::before,
    label:has(+ [data-current-checked='true']):has(~ [data-previous-checked='true'])::before {
      right: 0;
      left: unset;
    }
    label:has(+ [data-previous-checked='true'])
      ~ label:has(+ [data-current-checked='true'])::before,
    label:has(+ [data-current-checked='true']) ~ label::before {
      left: 0;
      right: unset;
    }
  }
  [data-style='hop'] {
    label {
      position: relative;
      background: #0000;
      overflow: hidden;
    }
    label::before {
      content: '';
      position: absolute;
      inset: 0;
      border-radius: 100px;
      z-index: -1;
      width: 100%;
    }

    label:hover {
      background: light-dark(
        color-mix(in srgb, canvasText, #0000 95%),
        color-mix(in srgb, canvasText, #fff0 75%)
      );
    }

    /* the labels that precede a checked option */
    label:has(+ :not(:checked) ~ :checked)::before {
      transform: translateX(100%);
    }

    /* the last checked that comes after the current checked */
    label:has(+ [data-current-checked='true']) ~ label::before {
      transform: translateX(-100%);
    }

    
    label:has(+ [data-previous-checked='true'])::before,
    label:has(+ [data-current-checked='true'])::before {
      background: light-dark(#000, #fff);
      transition: transform calc(var(--duration, 0.2) * 1s) ease-out;
    }
  }
  [data-style='hop'][data-wrap='true'] {
    fieldset:first-of-type:has(:nth-of-type(3)) {
      label:has(+ [data-current-checked='true']):first-of-type ~ label:last-of-type::before {
        transform: translateX(100%);
      }
      label:not(:has(+ [data-current-checked='true'])):first-of-type:has(
          ~ input:last-of-type:checked
        )::before {
        transform: translateX(-100%);
      }
    }
  }
}

@layer anchor {
  @supports (not (anchor-name: --active)) {
    .fields {
      position: relative;
    }
    .pill {
      top: calc(var(--top, 0) * 1px);
      left: calc(var(--left, 0) * 1px);
      height: calc(var(--height, 0) * 1px);
      width: calc(var(--width, 0) * 1px);
    }
    .fields[data-initiated='true'] .pill {
      transition-property: left, top, width;
      transition-duration: calc(var(--duration, 0.2) * 1s);
      transition-timing-function: ease-out;
    }
  }
  
  @supports (anchor-name: --active) {
    .pill {
      top: anchor(top);
      left: anchor(left);
      width: anchor-size(width);
      height: anchor-size(height);
      position-anchor: --active;
      transition-property: left, top, width;
      transition-duration: calc(var(--duration, 0.2) * 1s);
      transition-timing-function: ease-out;
    }
    label:has(+ :checked) {
      anchor-name: --active;
    }
  }
  [data-style='anchor'] {
    .pill {
      display: inline-block;
      background: light-dark(#000, #fff);
      position: absolute;
      border-radius: 100px;
    }
    fieldset {
      &:first-of-type {
        position: relative;
      }

      &:last-of-type {
        position: absolute;
        top: 0;
        left: 0;
        pointer-events: none;
        z-index: 2;
        /* makes room for the legend */
        -webkit-clip-path: inset(1lh 0 0 0);
                clip-path: inset(1lh 0 0 0);
      }
    }
    label:has(+ :checked) {
      background: #0000;
    }
    .mask-layer {
      display: inline-flex;
      background: light-dark(#fff, #000);

      legend {
        opacity: 0;
      }

      label {
        color: light-dark(#000, #fff);
        background: light-dark(#000, #fff);
        border: 1px solid light-dark(#000, #fff);
      }
    }
  }
}

@layer prototype {
  .resize-container {
    resize: both;
    overflow: auto;
    position: relative;
    width: 260px;
    height: 195px;
    font-family: monospace;
    padding: 2rem;
  }


  .fields {
    position: relative;
  }
  fieldset {
    border: 0;
  }

  fieldset, fieldset > div {
    display: inline-flex;
    flex-wrap: wrap;
    gap: 0.5rem;
  }

  legend {
    font-size: 0.875rem;
    font-weight: 300;
    letter-spacing: 0.1em;
    margin-bottom: 0.5rem;
    font-variant: small-caps;
    translate: 2ch 0;
  }
  fieldset label {
    padding: 0.5rem 1rem;
    border-radius: 100px;
    background: #0000;
    border: 1px solid color-mix(in srgb, canvasText, canvas);
    cursor: pointer;
    white-space: nowrap;
    transition-property: color, background;
    transition-duration: calc(var(--duration, 0.2) * 1s), 0.2s;
    transition-timing-function: ease-out;
    -webkit-user-select: none;
       -moz-user-select: none;
        -ms-user-select: none;
            user-select: none;

    &:hover {
      background: light-dark(
        color-mix(in srgb, canvasText, #0000 95%),
        color-mix(in srgb, canvasText, #fff0 75%)
      );
    }
  }
  label:has(+ :checked) {
    background: light-dark(#000, #fff);
    color: light-dark(#fff, #000);
  }
  .pill {
    z-index: -1;
  }
  .mask-layer,
  .pill {
    display: none;
  }
}

@layer base {
  :root {
    --font-size-min: 16;
    --font-size-max: 20;
    --font-ratio-min: 1.2;
    --font-ratio-max: 1.33;
    --font-width-min: 375;
    --font-width-max: 1500;
  }

  html {
    color-scheme: light dark;
  }

  [data-theme='light'] {
    color-scheme: light only;
  }

  [data-theme='dark'] {
    color-scheme: dark only;
  }

  [data-raw='true'] div.tp-dfwv {
    display: none;
  }

  [data-raw='true'] {
    scrollbar-color: #0000 #0000;
  }

  :where(.fluid) {
    --fluid-min: calc(
      var(--font-size-min) * pow(var(--font-ratio-min), var(--font-level, 0))
    );
    --fluid-max: calc(
      var(--font-size-max) * pow(var(--font-ratio-max), var(--font-level, 0))
    );
    --fluid-preferred: calc(
      (var(--fluid-max) - var(--fluid-min)) /
        (var(--font-width-max) - var(--font-width-min))
    );
    --fluid-type: clamp(
      (var(--fluid-min) / 16) * 1rem,
      ((var(--fluid-min) / 16) * 1rem) -
        (((var(--fluid-preferred) * var(--font-width-min)) / 16) * 1rem) +
        (var(--fluid-preferred) * var(--variable-unit, 100vi)),
      (var(--fluid-max) / 16) * 1rem
    );
    font-size: var(--fluid-type);
  }

  *,
  *:after,
  *:before {
    box-sizing: border-box;
  }

  body {
    background: light-dark(#fff, #000);
    display: grid;
    place-items: center;
    min-height: 100vh;
    font-family:
      'SF Pro Text', 'SF Pro Icons', 'AOS Icons', 'Helvetica Neue', Helvetica,
      Arial, sans-serif, system-ui;
  }

  body::before {
    --size: 45px;
    --line: color-mix(in hsl, canvasText, transparent 80%);
    content: '';
    height: 100vh;
    width: 100vw;
    position: fixed;
    background:
      linear-gradient(90deg, var(--line) 1px, transparent 1px var(--size))
        calc(var(--size) * 0.36) 50% / var(--size) var(--size),
      linear-gradient(var(--line) 1px, transparent 1px var(--size)) 0%
        calc(var(--size) * 0.32) / var(--size) var(--size);
    -webkit-mask: linear-gradient(140deg, #0000 65%, #fff);
            mask: linear-gradient(140deg, #0000 65%, #fff);
    top: 0;
    transform-style: flat;
    pointer-events: none;
    z-index: -1;
  }

  .bear-link {
    color: canvasText;
    position: fixed;
    top: 1rem;
    left: 1rem;
    width: 48px;
    aspect-ratio: 1;
    display: grid;
    place-items: center;
    opacity: 0.8;
  }

  :where(.x-link, .bear-link):is(:hover, :focus-visible) {
    opacity: 1;
  }

  .bear-link svg {
    width: 75%;
  }

  /* Utilities */
  .sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
  }
}

div.tp-dfwv {
  width: 256px;
  view-transition-name: prototype-config;
}
import gsap from 'https://esm.sh/[email protected]';
import Draggable from 'https://esm.sh/[email protected]/Draggable';
import { Pane } from 'https://esm.sh/[email protected]';
gsap.registerPlugin(Draggable);

const resizeContainer = document.querySelector('.resize-container');
let fieldset;
let fields;
let radios;
let labels;
let initialChecked;
let initialIndex = 0;
let maskContainer;
let checkedIndices;

const svgMask = document.querySelector('.svg-mask');

const config = {
  theme: 'system',
  style: 'hop',
  match: true,
  wrap: true,
  knockout: 'filter',
  duration: 0.2,
  variants: 5,
  options: ['128GB', '256GB', '512GB', '1TB', '2TB', '4TB', '8TB']
};

const ctrl = new Pane({
  title: 'config'
});

const buildFieldsets = () => {
  resizeContainer.innerHTML = `
  <div class="fields">
  <div class="pill"></div>
    <fieldset>
      <legend>capacity</legend>
      <div class="content">
        ${new Array(config.variants).fill().map((_, i) => `
          <label for="${config.options[i]}">
            <span class="variant-option__button-label__text">${config.options[i]}</span>
          </label>
          <input class="sr-only" ${i === initialIndex ? 'checked data-current-checked="true"' : ''} data-input-index="${i}" aria-label="${config.options[i]}" type="radio" name="capacity" value="${config.options[i]}" id="${config.options[i]}">
        `).join('')}
      </div>
    </fieldset>
    <fieldset aria-hidden="true" class="mask-layer">
      <legend>capacity</legend>
      ${new Array(config.variants).fill().map((_, i) => `
        <label>
          <span class="variant-option__button-label__text">${config.options[i]}</span>
        </label>
      `).join('')}
    </fieldset>
  </div>
  `;
  fields = resizeContainer.querySelector('.fields');
  fieldset = resizeContainer.querySelector('fieldset');
  radios = [...fieldset.querySelectorAll('input')];
  labels = [...fieldset.querySelectorAll('label')];
  maskContainer = resizeContainer.querySelector('fieldset:first-of-type > div');

  initialChecked = fieldset.querySelector('input:checked');
  initialIndex = radios.indexOf(initialChecked);
  checkedIndices = [initialIndex];
  fieldset.style.setProperty('--pill-width', `${labels[initialIndex].offsetWidth}px`);

  initialChecked.dataset.currentChecked = true;
};
buildFieldsets();

ctrl.addBinding(config, 'variants', {
  min: 2,
  max: config.options.length,
  step: 1
}).on('change', buildFieldsets);

ctrl.addBinding(config, 'duration', {
  min: 0,
  max: 2,
  step: 0.01
});

ctrl.addBinding(config, 'style', {
  options: {
    anchor: 'anchor',
    hop: 'hop'
  }
});

const wrap = ctrl.addBinding(config, 'wrap', {
  hidden: config.style !== 'hop'
});

const match = ctrl.addBinding(config, 'match', {
  hidden: config.style !== 'hop'
});

const knockout = ctrl.addBinding(config, 'knockout', {
  options: {
    filter: 'filter',
    mask: 'mask',
    none: 'none'
  },
  hidden: config.style === 'hop'
});

ctrl.addBinding(config, 'theme', {
  label: 'theme',
  options: {
    system: 'system',
    light: 'light',
    dark: 'dark'
  }
});

const update = () => {
  document.documentElement.dataset.theme = config.theme;
  document.documentElement.dataset.style = config.style;
  document.documentElement.dataset.match = config.match;
  document.documentElement.dataset.knockout = config.knockout;
  document.documentElement.dataset.wrap = config.wrap;
  document.documentElement.style.setProperty('--duration', config.duration);
  knockout.hidden = config.style === 'hop';
  match.hidden = wrap.hidden = config.style !== 'hop';
  ctrl.refresh();
};

const sync = event => {
  if (!document.startViewTransition || event.target.controller.view.labelElement.innerText !== 'theme') {
    return update();
  }
  document.startViewTransition(() => update());
};

ctrl.on('change', sync);

const isRaw = new URLSearchParams(window.location.search).get('raw') === 'true';
if (isRaw) document.documentElement.dataset.raw = 'true';

const tweakClass = 'div.tp-dfwv';
const d = Draggable.create(tweakClass, {
  type: 'x,y',
  allowEventDefault: true,
  trigger: tweakClass + ' button.tp-rotv_b'
});

document.querySelector(tweakClass).addEventListener('dblclick', () => {
  gsap.to(tweakClass, {
    x: `+=${d[0].x * -1}`,
    y: `+=${d[0].y * -1}`,
    onComplete: () => {
      gsap.set(tweakClass, { clearProps: 'all' });
    }
  });
});
update();

const updateMask = () => {
  const { left, top } = maskContainer.getBoundingClientRect();
  svgMask.setAttribute('viewBox', `0 0 ${maskContainer.offsetWidth} ${maskContainer.offsetHeight}`);

  const maskString = new Array(radios.length).fill().map((_, i) => {
    const { x, y, width, height } = labels[i].getBoundingClientRect();
    return `<rect x="${x - left}" y="${y - top}" width="${width}" height="${height}" rx="${height * 0.5}" ry="${height * 0.5}" fill="#000"></rect>`;
  }).join('');
  
  svgMask.innerHTML = maskString;
  const encoded = encodeURIComponent(svgMask.outerHTML).replace(/'/g, '%27').replace(/"/g, '%22');
  const dataUri = `data:image/svg+xml;utf8,${encoded}`;
  document.documentElement.style.setProperty('--svg-mask', `url(${dataUri})`);
};

const resizeHandler = new ResizeObserver(() => {
  if (config.style === 'anchor') {
    updateMask();
    if (!CSS.supports('anchor-name: --active')) {
      cacheBase();
      syncChecked();
    }
  }
});
resizeHandler.observe(resizeContainer);

const positions = [];
const syncChecked = () => {
  const checked = fieldset.querySelector(':checked');
  const index = radios.indexOf(checked);
  fields.style.setProperty('--top', positions[index].top);
  fields.style.setProperty('--left', positions[index].left);
  fields.style.setProperty('--width', positions[index].width);
  fields.style.setProperty('--height', positions[index].height);
  fields.style.setProperty('--marker-top', positions[index].top);
  fields.style.setProperty('--marker-left', positions[index].left);
};

const cacheBase = () => {
  const { x: fieldX, y: fieldY } = fields.getBoundingClientRect();
  const { x, y } = fieldset.querySelector('label').getBoundingClientRect();
  fields.style.setProperty('--left', x - fieldX);
  fields.style.setProperty('--top', y - fieldY);

  document.documentElement.style.setProperty('--marker-top', y - fieldY);
  document.documentElement.style.setProperty('--marker-left', x - fieldX);
  positions.length = 0;
  for (const label of labels) {
    const { height, width, left, top } = label.getBoundingClientRect();
    positions.push({
      width,
      height,
      left: left - fieldX,
      top: top - fieldY
    });
  }
};

resizeContainer.addEventListener('input', event => {
  if (config.style === 'hop') {
    const inputIndex = Number.parseInt(event.target.dataset.inputIndex || '');
    const [currentIndex, previousIndex] = checkedIndices;
    if (currentIndex !== undefined && radios[currentIndex]) {
      radios[currentIndex].dataset.previousChecked = 'false';
    }
    if (previousIndex !== undefined && radios[previousIndex]) {
      radios[previousIndex].dataset.previousChecked = 'false';
    }

    checkedIndices.unshift(inputIndex);
    checkedIndices.length = Math.min(checkedIndices.length, 2);

    const newCurrentIndex = checkedIndices[0];
    const newPreviousIndex = checkedIndices[1];

    if (newCurrentIndex !== undefined && radios[newCurrentIndex]) {
      var _radios$newCurrentInd;
      radios[newCurrentIndex].dataset.currentChecked = 'true';
      fieldset.style.setProperty(
        '--pill-width-current',
        `${((_radios$newCurrentInd = radios[newCurrentIndex].previousElementSibling) === null || _radios$newCurrentInd === void 0 ? void 0 : _radios$newCurrentInd.offsetWidth) || 0}px`
      );
    }

    if (newPreviousIndex !== undefined && radios[newPreviousIndex]) {
      var _radios$newPreviousIn;
      radios[newPreviousIndex].dataset.previousChecked = 'true';
      radios[newPreviousIndex].dataset.currentChecked = 'false';
      fieldset.style.setProperty(
        '--pill-width-previous',
        `${((_radios$newPreviousIn = radios[newPreviousIndex].previousElementSibling) === null || _radios$newPreviousIn === void 0 ? void 0 : _radios$newPreviousIn.offsetWidth) || 0}px`
      );
    }
  } else if (config.style === 'anchor') {
    if (!CSS.supports('anchor-name: --active')) {
      syncChecked();
    }
  }
});

if (!CSS.supports('anchor-name: --active')) {
  requestAnimationFrame(() => {
    cacheBase();
    syncChecked();
    fields.dataset.initiated = true;
  });
}
CSS-only hyper-realistic glowing volumetric bell with rotating rays and a realistic notification button.

CSS Hyper-Realistic Animated Glowing Bell

This showcase demonstrates the extreme rendering potential of pure CSS. By layer-masking realistic gradients, intricate custom clip-path shapes, and dynamic box-shadow depth, it renders a hyper-realistic glowing bell. Toggling the active state switches the glowing volumetric shafts, rotating light rays, and ambient button backlights using only sibling selectors.

Technologies:
HTML CSS
Difficulty: Advanced
Browser Support (as of Jul 2026):
Chrome Chrome Edge Edge Firefox Firefox Safari Safari
Features:
Volumetric Shading Interactive Toggle Ray Traced Conics Grain Overlay
Code by: Rafa Rafa
License: MIT
Loading...
<div class="bell-container off" onclick="this.classList.toggle('off')">
	<div class="rope"></div>
	<div class="bell-top"></div>

	<div class="bell-base"></div>
	<div class="bell-base"></div>
	<div class="shadow-l1"></div>
	<div class="shadow-l2"></div>
	<div class="left-glow"></div>
	<div class="left-glow2"></div>
	<div class="r-glow"></div>
	<div class="r-glow2"></div>
	<div class="mid-ring"></div>
	<div class="mid-ring small"></div>

	<div class="glow"></div>
	<div class="glow2"></div>

	<div class="bell-buff-t"></div>
	<div class="bell-buff"></div>

	<div class="bell-btm"></div>
	<div class="bell-btm2"></div>

	<div class="bell-ring-container">
		<div class="bell-ring"></div>
		<div class="bell-rays"></div>
	</div>

	<div class="volumetric">
		<div class="vl"></div>
		<div class="vr"></div>
	</div>

</div>
<div class="button">Notify Me</div>
<div class="grain"></div>
* {
	box-sizing: border-box;
}
html,
body {
	height: 100%;
	overflow: hidden;
}
body {
	display: flex;
	flex-direction: row;
	flex-wrap: wrap;
	justify-content: center;
	align-items: center;
	margin: 0;
	background: #000;

	font-size: calc(var(--_size) * 0.01);
	--_size: min(min(600px, 50vh), 50vw);
	--base-clr: #b7b5b4;
	--degofrot: 0.8;
}

.bell-container {
	width: 80em;
	height: 80em;
	opacity: 1;
	cursor: pointer;

	transform-origin: 50% -50vh;
	animation: 5s ease-in-out infinite bell;
}
@keyframes bell {
	0% {
		rotate: calc(1deg * var(--degofrot));
	}
	50% {
		rotate: calc(-1deg * var(--degofrot));
	}
	100% {
		rotate: calc(1deg * var(--degofrot));
	}
}

* {
	transition: filter 0.4s ease-in-out, box-shadow 0.4s ease-in-out,
		opacity 0.4s ease-in-out, color 0.4s ease-in-out, background 0.4s ease-in-out,
		text-shadow 0.4s ease-in-out;
}

*::before,
*::after {
	transition: filter 0.4s ease-in-out, box-shadow 0.4s ease-in-out,
		opacity 0.4s ease-in-out, color 0.4s ease-in-out, background 0.4s ease-in-out,
		text-shadow 0.4s ease-in-out;
}

.bell-container,
.bell-container * {
	position: absolute;
	left: 0;
	right: 0;
	top: 0;
	bottom: 0;
	margin: auto;
}

.rope {
	height: 50vh;
	width: 2em;
	translate: 0 -52%;
	background: linear-gradient(90deg, #2d54744d 0%, #000b 30%, transparent 100%),
		repeating-linear-gradient(-70deg, #252525, #888 2%, #3a3a3a 3%);
}

.bell-top {
	width: 14%;
	height: 14%;
	border-radius: 50%;
	translate: 0 -28em;
	background: var(--base-clr);
	box-shadow: inset -1em -0.5em 2em 0.5em #fff, inset 1em -1em 2em 3em #000,
		0 -0.1em 0.4em 0.3em #c6eaffa8;
}

.bell-base {
	width: 50%;
	height: 50%;
	border-radius: 50%;
	translate: 0 -24%;
	background: var(--base-clr);
	box-shadow: 0 -0.1em 0.4em 0.2em #c6eaffa8;
}
.bell-base:before {
	content: "";
	background-image: radial-gradient(
		circle at -80% -12%,
		transparent 50em,
		var(--base-clr) 50em
	);
	position: absolute;
	translate: -18em 20em;
	width: 100%;
	height: 80%;
}
.bell-base:after {
	content: "";
	background-image: radial-gradient(
		circle at -80% -12%,
		transparent 50.1em,
		#cacaca 50.3em,
		var(--base-clr) 50.5em
	);
	position: absolute;
	translate: 18em 20em;
	width: 100%;
	height: 80%;
	transform: rotateY(180deg);
}
.bell-base:nth-child(2) {
	filter: brightness(3) blur(1em);
	scale: 0.74 0.84;
	translate: 0em -11em;
}
.shadow-l1 {
	width: 30em;
	height: 42em;
	border-radius: 50%;
	rotate: 12deg;
	translate: -3em -6em;
	filter: blur(2em);
	background: #797a80;
}
.shadow-l2 {
	width: 130%;
	height: 90%;
	filter: blur(5em);
	translate: -6em 9em;
}
.shadow-l2::before {
	display: block;
	content: "";
	width: 68%;
	height: 64%;
	border-radius: 50%;
	rotate: -54deg;
	translate: -8em 2em;
	scale: 1;
	background: red;
	background: #000000;
}
.glow {
	width: 100%;
	height: 100%;
	filter: brightness(2) blur(2em);
}
.glow::before {
	clip-path: polygon(
		9% 83%,
		12% 79%,
		15% 74%,
		18% 68%,
		20% 62%,
		22% 56%,
		23% 50%,
		24% 43%,
		25% 38%,
		25% 34%,
		26% 29%,
		26% 26%,
		27% 22%,
		29% 19%,
		30% 15%,
		32% 13%,
		34% 10%,
		37% 7%,
		41% 5%,
		44% 4%,
		47% 3%,
		51% 3%,
		55% 3%,
		58% 5%,
		62% 6%,
		73% 29%,
		72% 25%,
		70% 20%,
		67% 16%,
		63% 12%,
		60% 9%,
		58% 8%,
		55% 7%,
		52% 6%,
		48% 6%,
		44% 8%,
		41% 9%,
		37% 12%,
		36% 14%,
		33% 16%,
		31% 20%,
		30% 23%,
		29% 26%,
		28% 31%,
		27% 36%,
		27% 39%,
		26% 44%,
		26% 48%,
		26% 52%,
		25% 56%,
		23% 61%,
		22% 65%,
		21% 69%,
		19% 72%,
		17% 75%,
		15% 78%,
		13% 81%
	);
	width: 100%;
	height: 80%;
	translate: 0 6em;
	scale: 0.94 0.94;
	background: #fff3;
	display: block;
	content: "";
}
.glow2 {
	width: 100%;
	height: 100%;
	filter: brightness(1) blur(0.3em);
	opacity: 0.1;
}
.glow2::before {
	clip-path: polygon(
		9.21% 83%,
		12.28% 79%,
		15.35% 74%,
		18.41% 68%,
		20.46% 62%,
		22.51% 56%,
		23.53% 50%,
		24.55% 43%,
		25.58% 34%,
		26.6% 29%,
		27.62% 22%,
		29.16% 18.5%,
		30.95% 15.75%,
		32.74% 13%,
		34.78% 10%,
		37.85% 7%,
		41.94% 5%,
		45.01% 4%,
		48.08% 3%,
		52.17% 3%,
		56.27% 3%,
		64.01% 6.36%,
		55.75% 4.5%,
		47.83% 4.75%,
		42.84% 5.88%,
		39.51% 7.88%,
		36.45% 10.38%,
		33.38% 14.88%,
		30.69% 19%,
		29.67% 22.5%,
		28.8% 26.72%,
		28.21% 31.36%,
		26.92% 38.44%,
		26.57% 43.67%,
		25.51% 48.34%,
		25% 54.34%,
		23.4% 60.69%,
		21.23% 65.38%,
		18.41% 71.5%,
		16.88% 74.75%,
		12.28% 80.5%
	);
	width: 100%;
	height: 84%;
	translate: -1em 8.4em;
	scale: 1;
	background: #fff3;
	display: block;
	content: "";
}
.left-glow {
	--lgc: #5d819666;
	width: 50%;
	height: 50%;
	border-radius: 50%;
	translate: 0 -24%;
	background: transparent;
	box-shadow: inset 1em 0em 1em 0.2em var(--lgc);
	clip-path: polygon(0 0, 100% 0, 100% 50%, 0 50%);
}
.left-glow2 {
	--lgc2: #5d819666;
	width: 49%;
	height: 50%;
	background-image: radial-gradient(
		circle at -80% -12%,
		transparent 50em,
		var(--lgc2) 50.3em,
		transparent 52em
	);
	position: absolute;
	translate: -19em 10.35em;
	clip-path: polygon(0 0, 100% 0, 100% 78%, 0 78%);
}
.r-glow {
	--lgc: #fffaf680;
	width: 50%;
	height: 50%;
	border-radius: 50%;
	translate: 0 -24%;
	background: transparent;
	box-shadow: inset 1em 0em 1em 0.2em var(--lgc);
	clip-path: polygon(0 0, 100% 0, 100% 50%, 0 50%);
	transform: rotateY(180deg);
}
.r-glow2 {
	--lgc2: #fffaf680;
	width: 49%;
	height: 50%;
	background-image: radial-gradient(
		circle at -80% -12%,
		transparent 50em,
		var(--lgc2) 50.3em,
		transparent 52em
	);
	position: absolute;
	translate: 18.2em 10.35em;
	clip-path: polygon(0 0, 100% 0, 100% 78%, 0 78%);
	transform: rotateY(180deg) rotateZ(-2deg);
}
.mid-ring.small {
	translate: 0.04em -8em;
	scale: 0.8 0.5;
}
.mid-ring {
	width: 64%;
	height: 10%;
	border-radius: 50%;
	translate: -0.1em 10em;
	box-shadow: inset -0.3em 1.3em 0.4em -1em #fff5,
		-0.2em -1.2em 0.4em -0.4em #505050, -0.1em -1.8em 0.4em -0.4em #fff5,
		0 -2.5em 0.4em -1em #000000;
	mix-blend-mode: hard-light;
	filter: brightness(0.8);
}
.mid-ring::before,
.mid-ring::after {
	content: "";
	display: block;
	background: #000;
	width: 2em;
	height: 2em;
	top: 10%;
	border-radius: 50%;
	position: absolute;
}
.mid-ring::after {
	right: -2%;
}
.mid-ring::before {
	left: -2%;
}
.bell-buff-t {
	background: #fff2;
	width: 72%;
	height: 12%;
	border-radius: 50%;
	translate: 0 16em;
	filter: blur(1em);
}
.bell-buff {
	background: linear-gradient(90deg, black 40%, var(--base-clr) 90%);
	width: 88%;
	height: 20%;
	border-radius: 50% 50% 50% 50% / 50% 50% 30% 30%;
	translate: 0 20em;
	box-shadow: inset 1em 0 2em -1em #5d819666, inset -1em 0 2em -1em #fff;
}
.bell-btm {
	width: 88%;
	height: 18%;
	border-radius: 50%;
	translate: 0 23em;
	background: linear-gradient(90deg, black 40%, var(--base-clr) 90%);
}
.bell-btm2 {
	width: 74%;
	height: 12%;
	border-radius: 50%;
	translate: 0 24em;
	background: #fffff6;
	box-shadow: 0 0 1em 0.6em #ffe9d4, -0.8em 0.2em 2em 1em #cca37f,
		-5.4em -0.6em 3em -1em #ce6e1abb, 6em -0.6em 3em -1em #ce6e1abb,
		inset 0em 30.3em 0.3em -30em #c7962d, inset 0 -2em 2em -2em #ffe9d4,
		inset 0em -1em 2em 1em #ce6e1a66;
	filter: brightness(1);
}
.off .bell-btm2 {
	filter: brightness(0.02);
}
.bell-ring-container {
	width: 74%;
	height: 24%;
	border-radius: 50% 50% 50% 50% / 25% 25% 0% 0%;
	translate: 0 29.2em;
	overflow: hidden;
}
.bell-ring {
	width: 12em;
	height: 12em;
	background: #fff;
	border-radius: 50%;
	translate: 0 -6em;
	box-shadow: 0 0.8em 1em -0.3em #f8e1d0, inset 0 -6em 4em -4em #e3b695,
		inset 0 1em 3em 1em #fff4, inset 0 2em 3em 1em #fff,
		inset 0 100em 0 100em #2c2c2c;
}
.off .bell-ring {
	background: #000;
	box-shadow: 0 0.8em 1em -0.3em #f8e1d000, inset 0 -6em 4em -4em #e3b69500,
		inset 0 1em 3em 1em #fff0, inset 0 -2em 3em 1em #fff2,
		inset 0 100em 0 100em #000;
}

.bell-rays {
	mix-blend-mode: soft-light;
	box-shadow: inset 0 -21em 4em -20em #000;
	width: 100%;
	height: 140%;
	translate: 0 -4em;
	border-radius: 50%;
}
.bell-rays::before {
	content: "";
	display: block;
	width: 100em;
	height: 100em;
	transform-origin: 50% 50%;
	position: absolute;
	left: -21em;
	top: -77em;
	border-radius: 100%;
	filter: blur(0.6em);
	background: repeating-conic-gradient(
		at 50% 50%,
		#fff2 0%,
		transparent 0.6%,
		#fff2 0.8%
	);
	animation: radiate 1s linear infinite;
}
.off .bell-rays {
	opacity: 0;
}
@keyframes radiate {
	0% {
		rotate: 0deg;
	}
	100% {
		rotate: 6deg;
	}
}

.volumetric {
	width: 98%;
	height: 224%;
	translate: 0 124em;
	opacity: 0.2;
}
.volumetric .vl {
	width: 100%;
	height: 100%;
	transform-origin: 50% 20em;
	rotate: 22deg;
	box-shadow: inset 40em 0 20em -20em #fff1;
}
.volumetric .vr {
	width: 100%;
	height: 100%;
	transform-origin: 50% 20em;
	rotate: -22deg;
	box-shadow: inset -40em 0 20em -20em #fff1;
}
.off .volumetric {
	opacity: 0;
}

.grain {
	z-index: 10;
	position: absolute;
	pointer-events: none;
	width: 100%;
	height: 100%;
	top: 0;
	bottom: 0;
	margin: auto;
	background: radial-gradient(circle at 50% 50%, #000, #0000),
		url("data:image/svg+xml,%3Csvg viewBox='0 0 600 600' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='2' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
	filter: contrast(100%) brightness(200%) grayscale(1) opacity(0.168);
	mix-blend-mode: screen;
}

.button {
	position: relative;
	font-size: 6em;
	font-family: monospace;
	background: #000;
	top: 8em;
	width: fit-content;
	height: fit-content;
	color: #000;
	cursor: pointer;
	padding: 0.4em 1.2em;
	border-radius: 0.4em;
	text-shadow: 0 -1px 3px #fff0;
	box-shadow: inset 0 0.04em 0.06em 0 #fff, inset 0 1em 1em 0 #fff5,
		inset 0 0.2em 0.2em 0 #e3b695;
	animation: 5s ease-in-out infinite lumenbtn;
}
.button:hover {
	color: #fff;
	text-shadow: 0 -1px 3px #fff;
	transition: all 0.16s ease-in-out;
}
.button::before,
.button::after {
	content: "";
	display: block;
	width: 100%;
	height: 54%;
	position: absolute;
	top: 6em;
	left: 0;
	right: 0;
}
.button::before {
	background: #e3b695;
	scale: 2;
	z-index: -2;
	filter: blur(12px);
	border-radius: 100%;
	animation: 5s ease-in-out infinite lumen;
}
.button::after {
	background: #000c;
	z-index: -1;
	filter: blur(0.3em);
	border-radius: 30%;
}

@keyframes lumenbtn {
	0% {
		box-shadow: inset 0 0.04em 0.06em 0 #fff,
			inset calc(-0.2em * var(--degofrot)) 1em 1em 0 #fff5,
			inset calc(-0.2em * var(--degofrot)) 0.2em 0.4em 0 #e3b695;
	}
	50% {
		box-shadow: inset 0 0.04em 0.06em 0 #fff,
			inset calc(0.2em * var(--degofrot)) 1em 1em 0 #fff5,
			inset calc(0.2em * var(--degofrot)) 0.2em 0.4em 0 #e3b695;
	}
	100% {
		box-shadow: inset 0 0.04em 0.06em 0 #fff,
			inset calc(-0.2em * var(--degofrot)) 1em 1em 0 #fff5,
			inset calc(-0.2em * var(--degofrot)) 0.2em 0.4em 0 #e3b695;
	}
}
@keyframes lumen {
	0% {
		translate: calc(-0.8em * var(--degofrot));
	}
	50% {
		translate: calc(0.8em * var(--degofrot));
	}
	100% {
		translate: calc(-0.8em * var(--degofrot));
	}
}

.off + .button {
	opacity: 0;
	pointer-events: none;
}
const bell = document.querySelector('.bell-container');
const button = document.querySelector('.button');

if (bell && button) {
  button.addEventListener('click', () => {
    bell.classList.toggle('off');
  });
}
Custom curved scrollbars generated with dynamic SVG path tracing to match container border radius using JavaScript.

Custom Curved SVG Border Radius Scrollbar

This highly innovative scrollbar solution bypasses the strict styling limitations of standard native scrollbars by rendering them as dynamic SVG overlays. By calculating container border-radius, sizing ratios, and scroll progression heights, it dynamically draws an SVG path to follow the container’s exact curvature. Grab states are handled seamlessly via the Pointer Events API and the SVG geometry method getPointAtLength.

Technologies:
SVG HTML CSS JavaScript
Difficulty: Advanced
Browser Support (as of Jul 2026):
Chrome Chrome Edge Edge Firefox Firefox Safari Safari
Features:
SVG Path Tracing Scrollbar Customization Pointer Grab Fluid Calculations
Code by: Chris Bolson Chris Bolson
License: MIT
Loading...
<header>
  <h1>Custom curved scrollbars</h1>
  <p>The scrollbar follows the border-radius of the container, it's length being calculated by the amount of content</p>
</header>


<div class="wrapper">
  <section class="scroll-container " data-scrollbar>
    <div class="scroll-content">
      
      <h2>Grab the scrollbar thumb and scroll up or down.</h2>
      <p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Modi placeat rem at esse reiciendis ullam veritatis sapiente sit ducimus ea magnam nihil vero corrupti quo quae, tempore dolor, reprehenderit debitis?
      </p>
      <img src='https://images.unsplash.com/photo-1759392658577-4324fb89b991?crop=entropy&cs=tinysrgb&fit=max&fm=jpg&ixid=M3wzMjM4NDZ8MHwxfHJhbmRvbXx8fHx8fHx8fDE3NjEzMzUxNTl8&ixlib=rb-4.1.0&q=80&w=400' alt='random' width="300" height="150">
      <p>Veritatis et repellendus, consequatur dicta saepe vel natus aliquam reprehenderit accusamus voluptatem commodi, minus eos nihil quae. Odit eveniet quia a minus natus qui reiciendis unde! Quam, odit temporibus? Illo.
      </p>
      <p>
        Sunt consectetur asperiores fuga quasi nobis vitae et commodi error deserunt perspiciatis, modi eaque iste eligendi quod esse aliquam. Vitae debitis minima, laborum incidunt ex corporis odit eaque consequatur beatae.
      </p>
      <p>Suscipit possimus mollitia ut minus commodi facilis distinctio assumenda corrupti voluptate, ipsa voluptates minima ex nam exercitationem? Laborum, sequi ducimus! Sunt repellendus dolorum suscipit similique accusamus eius ad laborum sed.</p>
      <p>
      Laboriosam beatae consequatur omnis repellat consequuntur obcaecati! Voluptatibus sunt quibusdam optio nihil delectus cumque unde omnis voluptatum laborum temporibus, labore perspiciatis quis impedit sapiente animi adipisci, explicabo velit nesciunt similique?</p>
      
    
      <p>In id itaque ullam totam, dolor blanditiis praesentium, at laborum esse molestias fugit dolorum sapiente dolores quo animi ducimus provident deserunt tempora, voluptatem recusandae aliquid. Tenetur harum doloremque provident excepturi!</p>
      <p>
      Et suscipit dolores, non ullam consequuntur illo cumque perspiciatis quos voluptate impedit quas? Similique omnis magnam iste quasi aspernatur neque. Quis porro consequuntur facere odio sapiente praesentium sed harum dignissimos.
      </p>
      <p>Quisquam porro esse fuga ducimus inventore, repellendus ad omnis perferendis velit atque commodi natus fugit, aliquid incidunt, eveniet odit. Sunt blanditiis expedita, laudantium fugit dignissimos eius provident aperiam cum deleniti!</p>
    </div>
  </section>

  <section class="scroll-container box-2 " data-scrollbar>
    <div class="scroll-content">
      <h2>Less border radius on this one</h2>
      <p>
      Ut quasi magni rerum magnam, earum officiis asperiores placeat maiores ullam sint debitis culpa! Nemo est, modi dolor eos, blanditiis, neque ullam facere voluptates accusamus quasi nostrum similique. Quod, itaque.
      </p>
      <p>Est rem voluptates nihil culpa fugiat possimus provident a adipisci facilis, molestias quos sed pariatur cum aperiam vitae. Repellat natus iure omnis, sed nisi laboriosam ullam pariatur aliquam dolore! Hic.
      </p>
      <p>In id itaque ullam totam, dolor blanditiis praesentium, at laborum esse molestias fugit dolorum sapiente dolores quo animi ducimus provident deserunt tempora, voluptatem recusandae aliquid. Tenetur harum doloremque provident excepturi!</p>
      <p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Modi placeat rem at esse reiciendis ullam veritatis sapiente sit ducimus ea magnam nihil vero corrupti quo quae, tempore dolor, reprehenderit debitis?
      </p>
      <p>Veritatis et repellendus, consequatur dicta saepe vel natus aliquam reprehenderit accusamus voluptatem commodi, minus eos nihil quae. Odit eveniet quia a minus natus qui reiciendis unde! Quam, odit temporibus? Illo.
      </p>
      <p>
        Sunt consectetur asperiores fuga quasi nobis vitae et commodi error deserunt perspiciatis, modi eaque iste eligendi quod esse aliquam. Vitae debitis minima, laborum incidunt ex corporis odit eaque consequatur beatae.
      </p>
      <p>Suscipit possimus mollitia ut minus commodi facilis distinctio assumenda corrupti voluptate, ipsa voluptates minima ex nam exercitationem? Laborum, sequi ducimus! Sunt repellendus dolorum suscipit similique accusamus eius ad laborum sed.</p>
      <p>
      Laboriosam beatae consequatur omnis repellat consequuntur obcaecati! Voluptatibus sunt quibusdam optio nihil delectus cumque unde omnis voluptatum laborum temporibus, labore perspiciatis quis impedit sapiente animi adipisci, explicabo velit nesciunt similique?</p>
      <p>
      Ut quasi magni rerum magnam, earum officiis asperiores placeat maiores ullam sint debitis culpa! Nemo est, modi dolor eos, blanditiis, neque ullam facere voluptates accusamus quasi nostrum similique. Quod, itaque.
      </p>
      <p>Est rem voluptates nihil culpa fugiat possimus provident a adipisci facilis, molestias quos sed pariatur cum aperiam vitae. Repellat natus iure omnis, sed nisi laboriosam ullam pariatur aliquam dolore! Hic.
      </p>
      <p>In id itaque ullam totam, dolor blanditiis praesentium, at laborum esse molestias fugit dolorum sapiente dolores quo animi ducimus provident deserunt tempora, voluptatem recusandae aliquid. Tenetur harum doloremque provident excepturi!</p>
      <p>
      Et suscipit dolores, non ullam consequuntur illo cumque perspiciatis quos voluptate impedit quas? Similique omnis magnam iste quasi aspernatur neque. Quis porro consequuntur facere odio sapiente praesentium sed harum dignissimos.
      </p>
      <p>Quisquam porro esse fuga ducimus inventore, repellendus ad omnis perferendis velit atque commodi natus fugit, aliquid incidunt, eveniet odit. Sunt blanditiis expedita, laudantium fugit dignissimos eius provident aperiam cum deleniti!</p>
      <p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Modi placeat rem at esse reiciendis ullam veritatis sapiente sit ducimus ea magnam nihil vero corrupti quo quae, tempore dolor, reprehenderit debitis?
      </p>
      <p>Veritatis et repellendus, consequatur dicta saepe vel natus aliquam reprehenderit accusamus voluptatem commodi, minus eos nihil quae. Odit eveniet quia a minus natus qui reiciendis unde! Quam, odit temporibus? Illo.
      </p>
      <p>
        Sunt consectetur asperiores fuga quasi nobis vitae et commodi error deserunt perspiciatis, modi eaque iste eligendi quod esse aliquam. Vitae debitis minima, laborum incidunt ex corporis odit eaque consequatur beatae.
      </p>
      <p>Suscipit possimus mollitia ut minus commodi facilis distinctio assumenda corrupti voluptate, ipsa voluptates minima ex nam exercitationem? Laborum, sequi ducimus! Sunt repellendus dolorum suscipit similique accusamus eius ad laborum sed.</p>
      <p>
      Laboriosam beatae consequatur omnis repellat consequuntur obcaecati! Voluptatibus sunt quibusdam optio nihil delectus cumque unde omnis voluptatum laborum temporibus, labore perspiciatis quis impedit sapiente animi adipisci, explicabo velit nesciunt similique?</p>
      
      Et suscipit dolores, non ullam consequuntur illo cumque perspiciatis quos voluptate impedit quas? Similique omnis magnam iste quasi aspernatur neque. Quis porro consequuntur facere odio sapiente praesentium sed harum dignissimos.
      </p>
      <p>Quisquam porro esse fuga ducimus inventore, repellendus ad omnis perferendis velit atque commodi natus fugit, aliquid incidunt, eveniet odit. Sunt blanditiis expedita, laudantium fugit dignissimos eius provident aperiam cum deleniti!</p>
    </div>
  </section>
</div>
@import url(https://fonts.bunny.net/css?family=krub:200i,300);
@layers demo,base;


@layer demo{
  
  .wrapper{
    display: grid;
    grid-template-columns: repeat(auto-fit,minmax(250px, 1fr));
    gap: 1rem;
    height: 500px;
    width: min(100%, 600px);
    margin: 0 auto;
  }
  .scroll-container {
		--card-border-radius: 50px;
		
    --thumb-color: rgb(0, 188, 255);
    --thumb-color-active: dodgerblue;
    --thumb-width: 4;
    --thumb-width-active: 6;
    
    --track-color: transparent;
    --track-color-active: light-dark(#EEE,#222);
    --track-width: 4;
    --track-width-active: 6;

		/* styling for the second card */
		&.box-2{
      --card-border-radius: 20px;
    	--thumb-color: rgb(154, 230, 0);
    	--thumb-color-active: rgb(124, 207, 0);
    }
		
		
    position: relative;
    width: 100%;
    contain:size;
    margin: 3rem auto;
    border: 1px solid var(--clr-lines);
    border-radius: var(--card-border-radius);
    overflow: hidden;  
    & h2{
      text-wrap: balance;
      font-size: 1.1rem;
    }
    & img{
      max-width: 100%;
      display: block;
    }
  }
	
  
  .scroll-content {
    height: 100%;
    overflow-y: auto;
    padding:1rem 1.5rem 1rem 1rem; /* space on right for scrollbar */
	
    /* keep scrolling functional */
    overflow-y: scroll;
  
    /* hide scrollbars */
	 	scrollbar-width: none; /* Firefox */
   	-ms-overflow-style: none; /* IE and Edge Legacy */
		&::-webkit-scrollbar {
			display: none; /* Chrome, Safari, and Opera */
		}
	}
  .scrollbar-svg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    &:has(:active) {
      --thumb-width: var(--thumb-width-active);
      --track-width: var(--track-width-active);
      --track-color: var(--track-color-active);
    }
  }
  
  .scrollbar-track {
    fill: none;
    stroke: var(--track-color);
    stroke-width: var(--track-width);
    stroke-linecap: round;
    transition: stroke-width,stroke;
    transiton-duration: 150ms;
    transition-timing-function:ease-in-out;
  }
  .scrollbar-thumb {
    fill: none;
    stroke: var(--thumb-color);
    stroke-width: var(--thumb-width);
    stroke-linecap: round;
    pointer-events: auto;
    cursor: grab;
    transition: stroke-width,stroke;
    transiton-duration: 150ms;
    transition-timing-function:ease-in-out;
    &:active {
      stroke: var(--thumb-color-active);
      cursor: grabbing;
    }
  }
  
}


@layer base{
  *{
  	box-sizing: border-box;
  }
  :root {
    color-scheme: light dark;
  
    --bg-dark: rgb(11, 11, 11);
    --bg-light: rgb(248, 244, 238);
    --txt-light: rgb(10, 10, 10);
    --txt-dark: rgb(245, 245, 245);
    --line-light: rgba(0 0 0 / .15);
    --line-dark: rgba(255 255 255 / .25);
  
    --clr-bg: light-dark(var(--bg-light), var(--bg-dark));
    --clr-txt: light-dark(var(--txt-light), var(--txt-dark));
    --clr-lines: light-dark(var(--line-light), var(--line-dark));
    --clr-accent: dodgerblue;
  
  }
  
  html, body {
    background-color: var(--clr-bg);
    color: var(--clr-txt);
    font-family: 'Krub', sans-serif;
    margin: 0;
    padding: 0;
    min-height: 100svh;
  }
  
  body {
    display: grid;
    place-content: center;
  	gap: 0;
    padding: 1rem;
    line-height: 1.4;
  }
  header{
    text-align: center;
    text-wrap: balance;
    width: min(100%, 60ch);
    margin: 0 auto;
  }
  h1{
    font-size: 1.2rem;
    margin: 0;
    text-align: center;
		text-transform: capitalize;
  }
  p{
    font-size: 0.8rem;
    opacity: .9;
  }
}
console.clear();

// config
const OFFSET = 7; // distance from edge of container
const EXTRA_INSET = 2;
const MIN_START_RATIO = 0.8;
const MIN_THUMB = 20;
const SEGMENTS = 50;

// init scrollbars - each has their own scoped functions and settings
document.querySelectorAll('[data-scrollbar]').forEach(container => {
  initCurvedScrollbar(container);
});

// function - init scrolled container
function initCurvedScrollbar(container) {
  const content = container.querySelector('.scroll-content');
  
  // create and add SVG
  svg = document.createElementNS("http://www.w3.org/2000/svg", "svg");
  svg.classList.add('scrollbar-svg');
  svg.setAttribute('aria-hidden', 'true');

  const trackPath = document.createElementNS("http://www.w3.org/2000/svg", "path");
  trackPath.classList.add('scrollbar-track');

  const thumbPath = document.createElementNS("http://www.w3.org/2000/svg", "path");
  thumbPath.classList.add('scrollbar-thumb');

  svg.appendChild(trackPath);
  svg.appendChild(thumbPath);
  container.appendChild(svg);
  
  // state
  let pathLength = 0;
  let thumbLength = 50;
  let dragging = false;
  let pointerId = null;

  // function - update
  function updatePath() {
    const w = container.clientWidth;
    const h = container.clientHeight;
    const r = parseFloat(getComputedStyle(container).borderRadius) || 0;

    const effectiveRadius = Math.max(r - OFFSET, 0);
    const trackX = w - OFFSET;
    const topY = OFFSET;
    const bottomY = h - OFFSET;
    const cornerX = trackX - effectiveRadius;

    // calculate x start point - ensure that it is never higher than the corner radius start point
    const minStartX = w * MIN_START_RATIO;
    let startX = trackX - effectiveRadius * EXTRA_INSET;
    if (startX < minStartX) startX = minStartX;
    if (startX > cornerX) startX = cornerX;

    // create the dynamic path
    const d = `
      M ${startX} ${topY}
      L ${cornerX} ${topY}                     
      A ${effectiveRadius} ${effectiveRadius} 0 0 1 ${trackX} ${topY + effectiveRadius} 
      L ${trackX} ${bottomY - effectiveRadius} 
      A ${effectiveRadius} ${effectiveRadius} 0 0 1 ${cornerX} ${bottomY} 
      L ${startX} ${bottomY}
    `;
    trackPath.setAttribute('d', d);

    // calculate length of thumb based on content height
    pathLength = trackPath.getTotalLength();
    const ratio = content.clientHeight / content.scrollHeight;
    thumbLength = Math.max(MIN_THUMB, pathLength * ratio);

    updateThumb();
  }

  // function - thumb update
  function updateThumb() {
    const scrollableHeight = content.scrollHeight - content.clientHeight || 1;
    const scrollRatio = content.scrollTop / scrollableHeight;
    const startOffset = (pathLength - thumbLength) * scrollRatio;
    const endOffset = startOffset + thumbLength;

    // the thumb needs to follow the path so we get the generated path points
    // NOTE - the high number of segments help follow the curves
    const points = [];
    for (let i = 0; i <= SEGMENTS; i++) {
      const t = startOffset + ((endOffset - startOffset) / SEGMENTS) * i;
      const p = trackPath.getPointAtLength(t);
      points.push(`${p.x} ${p.y}`);
    }
  
    const segmentD = `M ${points[0]} ${points.slice(1).map(pt => `L ${pt}`).join(' ')}`;
    thumbPath.setAttribute('d', segmentD);
  }

  //  function - grab thumb
  thumbPath.addEventListener('pointerdown', e => {
    e.preventDefault();
    dragging = true;
    pointerId = e.pointerId;
    thumbPath.setPointerCapture(pointerId);
  });
  
  // function - drag thumb
  window.addEventListener('pointermove', e => {
    if (!dragging || e.pointerId !== pointerId) return;
    const rect = container.getBoundingClientRect();
    let ratio = (e.clientY - rect.top) / rect.height;
    ratio = Math.max(0, Math.min(1, ratio));
    content.scrollTop = ratio * (content.scrollHeight - content.clientHeight);
    updateThumb();
  });
	
  // function - release thumb
  window.addEventListener('pointerup', e => {
    if (!dragging || e.pointerId !== pointerId) return;
    dragging = false;
    try { thumbPath.releasePointerCapture(pointerId); } catch {}
    pointerId = null;
  });

  // events
  content.addEventListener('scroll', updateThumb);
  window.addEventListener('resize', updatePath);

  updatePath();
}
Web component range slider supporting custom indicators, labels, various arcs, and keyboard/touch events using Shadow DOM.

Customizable Circular Range Slider Web Component

This highly accessible custom element is a masterclass in modern Web Components. It uses shadow DOM adopting stylesheets, semantic aria mappings, and native form integration to construct highly customizable circular dial sliders. By mapping custom trigonometric calculations onto conic gradients and offset paths, it perfectly structures speedometers, ovens, and semi-arc ranges with full keyboard and pointer capture support.

Technologies:
HTML CSS JavaScript
Difficulty: Advanced
Browser Support (as of Jul 2026):
Chrome Chrome Edge Edge Firefox Firefox Safari Safari
Features:
Web Component Responsive Sliders Keyboard Native Inputs Custom Arc Shapes
Code by: Mads Stoumann Mads Stoumann
License: MIT
Loading...
<form>
  <label id="speedometer-label">Speedometer
    <circular-range active-label="90" class="speedometer" aria-labelledby="speedometer-label" enable-min end="500" indices="50" labels="0:0,20:20,40:40,60:60,80:80,100:100,120:120,140:140,160:160,180:180,200:200" max="200" min="0" shift-step="10" start="220" suffix=" km" value="90">
    </circular-range>
  </label>

  <label id="full-circle-label">Full Circle
    <circular-range class="full-circle" aria-labelledby="full-circle-label" labels="0:0,5:5,10:10,15:15,20:20,25:25,30:30,35:35,40:40,45:45,50:50,55:55,60:60,65:65,70:70,75:75,80:80,85:85,90:90,95:95,100:0" value="50" min="0" max="100" suffix="%" step="5" indices="21"></circular-range>
  </label>

  <label id="oven-label">Oven
    <circular-range class="oven" aria-labelledby="oven-label" value="110" min="0" max="330" suffix="°C" step="5" start="20" end="340" indices="67" labels="0:0,20:20,40:40,60:60,80:80,100:100,120:120,140:140,160:160,180:180,200:200,220:220,240:240,260:260,280:280,300:300,320:320"></circular-range>
  </label>

  <label id="left-arc-label">Left Arc
    <circular-range class="left-arc" reverse aria-labelledby="left-arc-label" value="50" min="0" max="100" suffix="%" step="1" start="180" end="360" indices="11"></circular-range>
  </label>

  <label id="top-arc-label">Top Arc
    <circular-range class="top-arc" aria-labelledby="top-arc-label" value="50" min="0" max="100" suffix="$" step="1" start="270" end="450"></circular-range>
  </label>

  <label id="bottom-arc-label">Bottom Arc
    <circular-range class="bottom-arc" reverse aria-labelledby="bottom-arc-label" value="50" min="0" max="100" suffix="dB" step="1" start="90" end="270"></circular-range>
  </label>
</form>
form {
  --circular-range-w: 320px;
  font-family: system-ui, sans-serif;
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat( auto-fit, minmax(320px, 1fr) );
  margin-inline: auto;
  max-width: 1024px;
}

label {
  display: grid;
  font-weight: 700;
  place-content: center;
  width: 100%;
}

.bottom-arc {
  --circular-range-output-as: start;
  --circular-range-output-gr: 4;
  clip-path: inset(40% 0 0 0);
  margin-top: -140px;
}

.top-arc {
  clip-path: inset(0 0 40% 0);
  margin-bottom: -120px;
}

.full-circle,
.left-arc,
.oven {
  --circular-range-output-as: center;
  --circular-range-output-gr: 3;
}
/**
 * @module CircularRange
 * @version 1.0.8
 * @date 2025-08-19
 * @author Mads Stoumann
 * @description A circular range slider custom element with optional indices and labels.
 */
class CircularRange extends HTMLElement {
  static formAssociated = true;
  static #css = `
    :host {
      --circular-range-bg: #0000;
      --circular-range-bg-mask: none;
      --circular-range-bg-scale: 1;
      --circular-range-fill: #0066cc;
      --circular-range-fill-end: var(--circular-range-fill);
      --circular-range-fill-middle: var(--circular-range-fill);
      --circular-range-fill-start: var(--circular-range-fill);
      --circular-range-indice-bdrs: 0;
      --circular-range-indice-c: #999;
      --circular-range-indice-h: 5px;
      --circular-range-indice-w: 1px;
      --circular-range-indices-w: 80%;
      --circular-range-labels-c: light-dark(#333, #CCC);
      --circular-range-labels-fs: x-small;
      --circular-range-labels-w: 70%;
      --circular-range-output-as: end;
      --circular-range-output-c: inherit;
      --circular-range-output-ff: inherit;
      --circular-range-output-fs: 200%;
      --circular-range-output-fw: 700;
      --circular-range-output-gr: 2;
      --circular-range-rows: 5;
      --circular-range-thumb: var(--circular-range-fill);
      --circular-range-thumb-min: #e0e0e0;
      --circular-range-thumb-bxsh: 0 0 0 2px Canvas;
      --circular-range-thumb-bxsh-focus: 0 0 0 2px Canvas;
      --circular-range-track: #f0f0f0;
      --circular-range-track-sz: 1.5rem;
      --circular-range-maw: 320px;

      --_ga: 1 / 1 / calc(var(--circular-range-rows) + 1) / 1;
      --_mask: radial-gradient(circle farthest-side at center, #0000 calc(100% - var(--circular-range-track-sz) - 1px), var(--circular-range-fill) calc(100% - var(--circular-range-track-sz)));
      --_fill-start-angle: var(--_start);
      --_fill-end-angle: var(--_fill);

      aspect-ratio: 1;
      display: grid;
      grid-template-rows: repeat(var(--circular-range-rows), 1fr);
      max-width: var(--circular-range-maw);
      place-items: center;
      touch-action: none;
      user-select: none;
      width: var(--circular-range-w, 100%);
    }

    [part]:not([part="thumb"]) { 
      pointer-events: none; 
      user-select: none;
      -webkit-user-select: none;
    }
    ::slotted(*) { 
      pointer-events: none; 
      user-select: none;
      -webkit-user-select: none;
    }
    
    /* Prevent selection on all pseudo-elements */
    ::before, ::after {
      user-select: none;
      -webkit-user-select: none;
    }

    :host(:focus-visible) {
      outline: 0;
      [part="fill"] { opacity: .65; }
      [part="thumb"]::before {
        box-shadow: var(--circular-range-thumb-bxsh-focus);
        scale: 1.2;
      }
    }

    /* === TRACK AND FILL === */

    [part="fill"],
    [part="track"] {
      border-radius: 50%;
      grid-area: var(--_ga);
      height: 100%;
      mask: var(--_mask);
      width: 100%;
    }

    [part="fill"] {
      background: conic-gradient(
        from calc(var(--_fill-start) * 1deg),
        var(--circular-range-fill-start) 0deg,
        var(--circular-range-fill-middle) calc(var(--_fill-range) * 0.5deg),
        var(--circular-range-fill-end) calc(var(--_fill-range) * 1deg),
        #0000 calc(var(--_fill-range) * 1deg)
      );
      transition: all 0.2s ease-in-out;
      &::before {
        background: var(--circular-range-fill);
        offset-distance: var(--_tb);
      }
    }

    [part="track"] {
      background: conic-gradient(
        from calc(var(--_start) * 1deg),
        var(--circular-range-track) 0deg,
        var(--circular-range-track) calc((var(--_end) - var(--_start)) * 1deg),
        #0000 calc((var(--_end) - var(--_start)) * 1deg)
      );
      &::before {
        background: var(--circular-range-track);
        offset-distance: var(--_tb);
      }
      &::after {
        background: var(--circular-range-track);
        offset-distance: var(--_tb); }
      }

    [part="fill"]::before,
    [part="track"]::before,
    [part="track"]::after {
      border-radius: 50%;
      content: '';
      display: block;
      height: var(--circular-range-track-sz);
      offset-anchor: top;
      offset-path: content-box;
      width: var(--circular-range-track-sz);
    }

    /* === THUMB === */

    [part="thumb"] {
      grid-area: var(--_ga);
      height: 100%;
      rotate: calc(1deg * var(--_fill, 0));
      width: var(--circular-range-track-sz);
      will-change: transform;
      &::before {
        aspect-ratio: 1;
        background-color: var(--circular-range-thumb);
        border-radius: 50%;
        box-shadow: var(--circular-range-thumb-bxsh);
        content: '';
        display: block;
        transition: all 0.2s ease-in-out;
        width: 100%;
      }
    }

    :host(.at-min) [part="thumb"]::before {
      background-color: var(--circular-range-thumb-min);
    }

    /* === VALUE === */

    :host::after {
      align-self: var(--circular-range-output-as);
      color: var(--circular-range-output-c);
      counter-reset: val var(--_value);
      content: counter(val) attr(suffix);
      font-family: var(--circular-range-output-ff);
      font-size: var(--circular-range-output-fs);
      font-weight: var(--circular-range-output-fw);
      grid-column: 1;
      grid-row: var(--circular-range-output-gr);
      isolation: isolate;
      pointer-events: none;
      text-box: cap alphabetic;
    }

    /* === OPTIONAL BACKGROUND LAYER === */

    :host::before {
      background: var(--circular-range-bg);
      border-radius: 50%;
      content: '';
      display: block;
      grid-area: var(--_ga);
      height: 100%;
      mask: var(--circular-range-bg-mask);
      scale: var(--circular-range-bg-scale);
      width: 100%;
    }

    /* === INDICES === */

    [part="indices"] {
      aspect-ratio: 1;
      border-radius: 50%;
      grid-area: var(--_ga);
      padding: 0;
      width: var(--circular-range-indices-w);
      li {
        background: var(--circular-range-indice-c);
        border-radius: var(--circular-range-indice-bdrs);
        display: inline-block;
        height: var(--circular-range-indice-h);
        offset-anchor: top;
        offset-distance: var(--_p, 0%);
        offset-path: content-box;
        width: var(--circular-range-indice-w);
      }
    }

    /* === LABELS === */

    [part="labels"] {
      aspect-ratio: 1;
      border-radius: 50%;
      color: var(--circular-range-labels-c);
      font-size: var(--circular-range-labels-fs);
      grid-area: var(--_ga);
      padding: 0;
      width: var(--circular-range-labels-w);
      li {
        display: inline-block;
        offset-anchor: top;
        offset-distance: var(--_p, 0%);
        offset-path: content-box;
        offset-rotate: 0deg;
      }
    }
  `;

  #angleAngle;
  #CX;
  #CY;
  #endAngle;
  #internals;
  #lastValue;
  #max;
  #min;
  #radian;
  #range;
  #reverse;
  #shiftStep;
  #startAngle;
  #step;
  #isSafari;
  #safariVisHandler;
  #safariPageShowHandler;

  constructor() {
    super();
    this.#isSafari = /Safari\//.test(navigator.userAgent) && !/(Chrome|Chromium|Edg|OPR|CriOS|FxiOS)/.test(navigator.userAgent);
    this.attachShadow({ mode: 'open' });
    this.#internals = this.attachInternals();
    const sheet = new CSSStyleSheet();
    sheet.replaceSync(CircularRange.#css);
    this.shadowRoot.adoptedStyleSheets = [sheet];
    this.shadowRoot.innerHTML = `
      <div part="track"></div>
      <div part="fill"></div>
      <div part="thumb"></div>
      <ul part="indices"></ul>
      <ol part="labels"></ol>
      <slot></slot>`;
  }

  connectedCallback() {
    this.tabIndex = 0;
    this.#readAttributes();
    this.#convertInitialValue();
    this.shadowRoot.querySelector('[part="indices"]').innerHTML = this.#generateIndices();
    this.#renderLabels();
    this.setAttribute('role', 'slider');
    /* Small timeout-hack to ensure styles are applied before the first update */
    setTimeout(() => {
      this.#update();
      this.#updateActiveLabel();
      const value = Number(this.getAttribute('value')) || 0;
      this.#internals.setFormValue(value);
      this.classList.toggle('at-min', this.hasAttribute('enable-min') && value === this.#min);
      if (this.#isSafari) this.#safariRepaint();
    });

    if (this.#isSafari) {
      this.#safariVisHandler = () => { if (!document.hidden) this.#safariRepaint(); };
      this.#safariPageShowHandler = () => this.#safariRepaint();
      document.addEventListener('visibilitychange', this.#safariVisHandler);
      window.addEventListener('pageshow', this.#safariPageShowHandler);
    }
    this.addEventListener('keydown', this.#keydown);
    this.addEventListener('pointerdown', this.#pointerdown);
  }

  disconnectedCallback() {
    this.removeEventListener('keydown', this.#keydown);
    this.removeEventListener('pointerdown', this.#pointerdown);
    if (this.#isSafari) {
      document.removeEventListener('visibilitychange', this.#safariVisHandler);
      window.removeEventListener('pageshow', this.#safariPageShowHandler);
    }
  }

  static get observedAttributes() { return ['value', 'active-label']; }

  attributeChangedCallback(name, oldValue, newValue) {
    if (oldValue === newValue) return;
    if (name === 'value') {
      this.#update();
    } else if (name === 'active-label') {
      this.#updateActiveLabel();
    }
  }

  get value() {
    const value = Number(this.getAttribute('value')) || 0;
    return this.#reverse ? this.#min + this.#max - value : value;
  }

  set value(newValue) {
    const normalizedValue = this.#reverse ? this.#min + this.#max - newValue : newValue;
    this.#setValue(normalizedValue);
  }

  get valueAsNumber() {
    return Number(this.value);
  }

  get name() { return this.getAttribute('name') ?? ''; }

  set name(newName) {
    if (newName === null || newName === undefined) {
      this.removeAttribute('name');
    } else {
      this.setAttribute('name', String(newName));
    }
  }

  #readAttributes() {
    this.#min = Number(this.getAttribute('min')) || 0;
    this.#max = Number(this.getAttribute('max')) || 100;
    this.setAttribute('aria-valuemin', this.#min);
    this.setAttribute('aria-valuemax', this.#max);
    this.#reverse = this.hasAttribute('reverse');
    this.#step = Number(this.getAttribute('step')) || 1;
    this.#shiftStep = Number(this.getAttribute('shift-step')) || this.#step;
    this.#startAngle = Number(this.getAttribute('start')) || 0;
    this.#endAngle = Number(this.getAttribute('end')) || 360;
    this.#range = this.#max - this.#min;
    this.#angleAngle = this.#endAngle - this.#startAngle;
    this.#radian = this.#angleAngle / this.#range;
    this.style.setProperty('--_start', this.#startAngle);
    this.style.setProperty('--_end', this.#endAngle);

    if (this.#reverse) {
      this.style.setProperty('--_tb', `${(this.#endAngle / 360) * 100}%`);
      this.style.setProperty('--_ta', `${(this.#startAngle / 360) * 100}%`);
    } else {
      this.style.setProperty('--_tb', `${(this.#startAngle / 360) * 100}%`);
      this.style.setProperty('--_ta', `${(this.#endAngle / 360) * 100}%`);
    }
  }

  #convertInitialValue() {
    if (this.#reverse && this.hasAttribute('value')) {
      const userValue = Number(this.getAttribute('value')) || 0;
      const internalValue = this.#min + this.#max - userValue;
      this.setAttribute('value', internalValue);
    }
  }

  #update() {
    const value = Number(this.getAttribute('value')) || 0;
    const displayValue = this.#reverse ? this.#min + this.#max - value : value;
    this.setAttribute('aria-valuenow', displayValue);
    const fillPercentage = this.#range > 0 ? (value - this.#min) / this.#range : 0;
    const fillAngle = this.#startAngle + (fillPercentage * this.#angleAngle);
    this.style.setProperty('--_value', displayValue);
    this.style.setProperty('--_fill', fillAngle);

    if (this.#reverse) {
      this.style.setProperty('--_fill-start', fillAngle);
      this.style.setProperty('--_fill-range', this.#endAngle - fillAngle);
    } else {
      this.style.setProperty('--_fill-start', this.#startAngle);
      this.style.setProperty('--_fill-range', fillAngle - this.#startAngle);
    }
  }

  #safariRepaint() {
    const v = this.getAttribute('value') ?? '0';
    this.getBoundingClientRect();
    this.style.setProperty('--_invalidate', performance.now().toString());
    this.setAttribute('value', v);
  }

  #setValue(newValue) {
    const steppedValue = Math.round((newValue - this.#min) / this.#step) * this.#step + this.#min;
    const clampedValue = Math.max(this.#min, Math.min(this.#max, steppedValue));
    if (this.value === clampedValue) return;
    this.setAttribute('value', clampedValue);
    this.#internals.setFormValue(clampedValue);

    this.classList.toggle('at-min', this.hasAttribute('enable-min') && clampedValue === this.#min);
    this.dispatchEvent(new Event('input', { bubbles: true }));
  }

  #updateActiveLabel() {
    const activeLabelValue = this.getAttribute('active-label');
    const labels = this.shadowRoot.querySelectorAll('[part="labels"] li');
    labels.forEach(label => label.part.remove('active-label'));
    if (activeLabelValue) {
      const activeLabel = this.shadowRoot.querySelector(`[part="labels"] li[value="${activeLabelValue}"]`);
      if (activeLabel) activeLabel.part.add('active-label');
    }
  }

  #pointerdown(event) {
    this.setPointerCapture(event.pointerId);
    this.#lastValue = Number(this.getAttribute('value')) || 0;
    this.#CX = this.offsetWidth / 2;
    this.#CY = this.offsetHeight / 2;
    this.#pointerMove(event);
    this.addEventListener('pointermove', this.#pointerMove);
    this.addEventListener('pointerup', () => this.removeEventListener('pointermove', this.#pointerMove), { once: true });
  }

  #pointerMove(event) {
    const degree = (((Math.atan2(event.offsetY - this.#CY, event.offsetX - this.#CX) * 180 / Math.PI) + 90 + 360) % 360);
    const relativeDegree = (degree - this.#startAngle + 360) % 360;
    let value = (relativeDegree / this.#radian) + this.#min;

    if (this.#angleAngle < 360) {
      if (relativeDegree > this.#angleAngle) {
        this.#setValue(relativeDegree - this.#angleAngle < (360 - this.#angleAngle) / 2 ? this.#max : this.#min);
        return;
      }
    } else if (Math.abs(value - this.#lastValue) > this.#range / 2) {
      value = value > this.#lastValue ? this.#min : this.#max;
    }

    this.#lastValue = value;
    this.#setValue(value);
  }

  #keydown(event) {
    if (!event.key.startsWith('Arrow')) return;
    event.preventDefault();
    const step = event.shiftKey ? this.#shiftStep : this.#step;
    const increment = (event.key === 'ArrowUp' || event.key === 'ArrowRight') ? step : -step;
    this.#setValue((Number(this.getAttribute('value')) || this.#min) + increment);
  }

  #generateIndices() {
    const count = parseInt(this.getAttribute('indices')) || 0;
    if (count === 0) return '';
    const startPercent = this.#startAngle / 360 * 100;
    const rangePercent = this.#angleAngle / 360 * 100;
    const step = rangePercent / (count - 1);
    return Array.from({ length: count }, (_, i) => 
      `<li style="--_p:${startPercent + (i * step)}%"></li>`
    ).join('');
  }

  #renderLabels() {
    const labels = this.getAttribute('labels');
    if (!labels) return;
    const ol = this.shadowRoot.querySelector('[part="labels"]');
    ol.setAttribute('aria-hidden', 'true');
    ol.innerHTML = '';

    const labelsArray = labels.split(',');
    const totalLabels = labelsArray.length;
    const stepSize = this.#range / (totalLabels - 1);

    labelsArray.forEach((pair, index) => {
      const [valueRaw, labelRaw] = pair.split(':');
      if (!valueRaw?.trim() || !labelRaw?.trim()) return;
      
      const value = Number(valueRaw.trim());
      if (value < this.#min || value > this.#max) return;

      const li = document.createElement('li');
      li.setAttribute('value', value);
      li.part.add(`label-${value}`);
      li.textContent = labelRaw.trim();

      const positionValue = this.#reverse 
        ? this.#min + ((totalLabels - 1 - index) * stepSize)
        : value;
      
      const degree = ((positionValue - this.#min) * this.#radian) + this.#startAngle;
      li.style.setProperty('--_p', `${(degree / 360) * 100}%`);

      ol.appendChild(li);
    });
  }
}

customElements.define('circular-range', CircularRange);
export default CircularRange;
Dark editorial photography grid gallery featuring smooth dragging with inertia, fluid zoom levels, and seamless split-screen detail views.

Draggable Zoom Grid Gallery using GSAP

An elegant, dark editorial photography grid gallery featuring a draggable layout built with GSAP Draggable and InertiaPlugin. The component supports fluid zoom levels (from 30% to 100%), seamless split-screen detail views using Flip, and staggered caption animations. Interactive canvas elements and Web Audio API triggers enrich the experience without compromising on general interface rendering speed. (Requires: gsap.js, draggable.js, inertiaPlugin.js, customEase.js, flip.js)

Technologies:
HTML CSS JavaScript
Difficulty: Advanced
Browser Support (as of Jul 2026):
Chrome Chrome Edge Edge Firefox Firefox Safari Safari
Features:
Inertia Dragging Smooth Zooming Split Screen View Interactive Audio
License: MIT
Highly interactive drag-and-snap floating popover chat input with smooth transitions and gravity snap zones using GSAP FLIP.

FLIP Drag Snap Floating Popover on GSAP

This prototype demonstrates a dynamic draggable chat input combining the native HTML Popover API with GSAP FLIP, Draggable, and Inertia. Pulling the toggle button breaks its resistance to lock onto proximity gravity wells. Toggling the popover morphs the circular button smoothly into a fully functional editor using layout-driven calculations to prevent offscreen rendering. (Requires: gsap.js, gsap-draggable.js, gsap-inertia.js, gsap-flip.js, tweakpane.js)

Technologies:
HTML CSS JavaScript
Difficulty: Advanced
Browser Support (as of Jul 2026):
Chrome Chrome Edge Edge Firefox Firefox Safari Safari
Features:
Dynamic Drag Snapping FLIP Layout Morphs Popover API Native Inertial Physics
Code by: Jhey Jhey
License: MIT
Loading...
<button
      aria-label="Start chat"
      class="toggle"
      popovertarget="chat"
      popovertargetaction="toggle"
    >
      <svg
        xmlns="http://www.w3.org/2000/svg"
        width="24"
        height="24"
        viewBox="0 0 24 24"
        fill="none"
        stroke="currentColor"
        stroke-width="2"
        stroke-linecap="round"
        stroke-linejoin="round"
      >
        <circle cx="12" cy="12" r="1"></circle>
        <path
          d="M20.2 20.2c2.04-2.03.02-7.36-4.5-11.9-4.54-4.52-9.87-6.54-11.9-4.5-2.04 2.03-.02 7.36 4.5 11.9 4.54 4.52 9.87 6.54 11.9 4.5Z"
        ></path>
        <path
          d="M15.7 15.7c4.52-4.54 6.54-9.87 4.5-11.9-2.03-2.04-7.36-.02-11.9 4.5-4.52 4.54-6.54 9.87-4.5 11.9 2.03 2.04 7.36.02 11.9-4.5Z"
        ></path>
      </svg>
    </button>
    <div id="chat" popover="manual">
      <span class="placeholder">
        <svg
          xmlns="http://www.w3.org/2000/svg"
          viewBox="0 0 24 24"
          fill="none"
          stroke="currentColor"
          stroke-width="2"
          stroke-linecap="round"
          stroke-linejoin="round"
        >
          <circle cx="12" cy="12" r="1"></circle>
          <path
            d="M20.2 20.2c2.04-2.03.02-7.36-4.5-11.9-4.54-4.52-9.87-6.54-11.9-4.5-2.04 2.03-.02 7.36 4.5 11.9 4.54 4.52 9.87 6.54 11.9 4.5Z"
          ></path>
          <path
            d="M15.7 15.7c4.52-4.54 6.54-9.87 4.5-11.9-2.03-2.04-7.36-.02-11.9 4.5-4.52 4.54-6.54 9.87-4.5 11.9 2.03 2.04 7.36.02 11.9-4.5Z"
          ></path>
        </svg>
      </span>
      <div class="popover__content">
        <textarea
          placeholder="What do you want to build?"
          name="prompt"
          id="prompt"
          data-gramm="false"
          autocomplete="off"
          spellcheck="false"
        ></textarea>

        <div class="actions">
          <div class="secondary">
            <button aria-label="Attach">
              <svg
                xmlns="http://www.w3.org/2000/svg"
                viewBox="0 0 24 24"
                fill="none"
                stroke="currentColor"
                stroke-width="2"
                stroke-linecap="round"
                stroke-linejoin="round"
              >
                <path d="M13.234 20.252 21 12.3"></path>
                <path
                  d="m16 6-8.414 8.586a2 2 0 0 0 0 2.828 2 2 0 0 0 2.828 0l8.414-8.586a4 4 0 0 0 0-5.656 4 4 0 0 0-5.656 0l-8.415 8.585a6 6 0 1 0 8.486 8.486"
                ></path>
              </svg>
            </button>
            <button aria-label="Search">
              <svg
                xmlns="http://www.w3.org/2000/svg"
                viewBox="0 0 24 24"
                fill="none"
                stroke="currentColor"
                stroke-width="2"
                stroke-linecap="round"
                stroke-linejoin="round"
              >
                <path d="M21.54 15H17a2 2 0 0 0-2 2v4.54"></path>
                <path
                  d="M7 3.34V5a3 3 0 0 0 3 3a2 2 0 0 1 2 2c0 1.1.9 2 2 2a2 2 0 0 0 2-2c0-1.1.9-2 2-2h3.17"
                ></path>
                <path
                  d="M11 21.95V18a2 2 0 0 0-2-2a2 2 0 0 1-2-2v-1a2 2 0 0 0-2-2H2.05"
                ></path>
                <circle cx="12" cy="12" r="10"></circle>
              </svg>
            </button>
            <button aria-label="Cook">
              <svg
                xmlns="http://www.w3.org/2000/svg"
                viewBox="0 0 24 24"
                fill="none"
                stroke="currentColor"
                stroke-width="2"
                stroke-linecap="round"
                stroke-linejoin="round"
              >
                <path
                  d="M17 21a1 1 0 0 0 1-1v-5.35c0-.457.316-.844.727-1.041a4 4 0 0 0-2.134-7.589 5 5 0 0 0-9.186 0 4 4 0 0 0-2.134 7.588c.411.198.727.585.727 1.041V20a1 1 0 0 0 1 1Z"
                ></path>
                <path d="M6 17h12"></path>
              </svg>
            </button>
          </div>
          <div class="primary">
            <button aria-label="Minimize">
              <svg
                xmlns="http://www.w3.org/2000/svg"
                viewBox="0 0 24 24"
                fill="none"
                stroke="currentColor"
                stroke-width="2"
                stroke-linecap="round"
                stroke-linejoin="round"
              >
                <polyline points="4 14 10 14 10 20"></polyline>
                <polyline points="20 10 14 10 14 4"></polyline>
                <line x1="14" x2="21" y1="10" y2="3"></line>
                <line x1="3" x2="10" y1="21" y2="14"></line>
              </svg>
            </button>
            <button aria-label="Submit" class="submit">
              <svg
                xmlns="http://www.w3.org/2000/svg"
                viewBox="0 0 24 24"
                fill="none"
                stroke="currentColor"
                stroke-width="2"
                stroke-linecap="round"
                stroke-linejoin="round"
              >
                <polyline points="9 10 4 15 9 20"></polyline>
                <path d="M20 4v7a4 4 0 0 1-4 4H4"></path>
              </svg>
            </button>
          </div>
        </div>
      </div>
    </div>
    <div class="targets">
      <div class="target target--north"></div>
      <div class="target target--west"></div>
      <div class="target target--south-west"></div>
      <div class="target target--south"></div>
      <div class="target target--south-east"></div>
      <div class="target target--east"></div>
    </div>
    <div class="info">
      <span class="arrow arrow--debug">
        <span>check<br />the debug</span>
        <svg
          viewBox="0 0 122 97"
          fill="none"
          xmlns="http://www.w3.org/2000/svg"
        >
          <path
            fill-rule="evenodd"
            clip-rule="evenodd"
            d="M116.102 0.0996005C114.952 0.334095 112.7 1.53002 111.433 2.53834C110.869 2.98388 109.368 4.15635 108.077 5.11778C103.455 8.6352 102.61 9.40903 102.187 10.4877C101.39 12.5982 102.798 14.5914 105.097 14.5914C106.13 14.5914 108.241 13.7941 109.696 12.8561C110.424 12.3871 111.01 12.0823 111.01 12.1526C111.01 12.692 107.796 17.8274 106.2 19.8206C102.023 25.0733 95.6642 29.6928 86.2548 34.2889C81.0926 36.8214 77.4555 38.2753 73.9123 39.2367C71.7066 39.823 70.6507 39.9871 67.9053 40.0809C66.0516 40.1513 64.5499 40.1747 64.5499 40.1278C64.5499 40.0809 64.808 38.9788 65.1365 37.6891C65.465 36.3993 65.8404 34.1716 66.0047 32.7647C66.4505 28.3796 65.4884 24.2994 63.4704 22.2359C62.1564 20.8758 60.9363 20.3599 59.0121 20.3599C57.6043 20.3599 57.1115 20.4537 55.7975 21.1103C52.8878 22.5407 50.5648 25.9878 49.5089 30.4197C48.453 34.922 49.2742 38.0877 52.3481 41.1127C53.4744 42.2148 54.46 42.9183 55.9852 43.6921C57.1584 44.2549 58.1439 44.7473 58.1909 44.7708C58.5898 45.0053 54.5304 53.4705 52.0666 57.6211C47.4674 65.3125 39.3486 74.575 30.5728 82.0789C22.2427 89.2309 16.7285 92.4435 9.87677 94.1553C8.28116 94.554 7.13138 94.6478 4.2452 94.6478C1.17131 94.6712 0.608154 94.7181 0.608154 95.023C0.608154 95.234 1.19478 95.5857 2.13337 95.9609C3.54126 96.4768 3.96363 96.5472 7.41296 96.5237C10.5572 96.5237 11.4724 96.4299 13.1149 96.0078C21.7265 93.6863 31.1594 87.1908 42.6102 75.7006C49.2977 69.0175 52.5828 64.9373 56.1494 58.9343C58.0501 55.7217 60.6312 50.6801 61.7575 47.9365L62.5553 45.9902L64.0806 46.1543C71.3547 46.9047 77.7136 45.3101 88.3667 40.034C96.2274 36.1414 101.976 32.3426 106.505 28.0748C108.617 26.0816 111.855 22.2828 112.794 20.7117C113.028 20.313 113.286 19.9847 113.357 19.9847C113.427 19.9847 113.662 20.782 113.873 21.72C114.084 22.6814 114.647 24.276 115.093 25.2609C115.82 26.8085 116.008 27.043 116.454 26.9727C116.876 26.9258 117.228 26.4333 117.956 24.9795C119.317 22.2828 119.833 20.2661 120.772 13.8879C121.757 7.25168 121.781 4.4143 120.889 2.56179C119.95 0.615488 118.12 -0.322489 116.102 0.0996005ZM60.7016 25.7767C61.4525 26.9023 61.8279 29.2942 61.6637 31.9205C61.4759 34.7813 60.5139 38.9788 60.0681 38.9788C59.5284 38.9788 57.1584 37.6422 56.2198 36.8214C54.8354 35.6021 54.3426 34.2889 54.5538 32.2957C54.8589 29.2473 56.1964 26.2223 57.5808 25.3547C58.7306 24.6512 60.0681 24.8388 60.7016 25.7767Z"
            fill="currentColor"
          />
        </svg>
      </span>
      <span class="arrow arrow--instruction">
        <span>open / drag and fling</span>
        <svg viewBox="0 0 97 52" fill="none" xmlns="http://www.w3.org/2000/svg">
          <path
            fill-rule="evenodd"
            clip-rule="evenodd"
            d="M74.568 0.553803C74.0753 0.881909 73.6295 1.4678 73.3713 2.12401C73.1367 2.70991 72.3858 4.67856 71.6584 6.50658C70.9544 8.35803 69.4526 11.8031 68.3498 14.1936C66.1441 19.0214 65.839 20.2167 66.543 21.576C67.4581 23.3337 69.4527 23.9196 71.3064 22.9821C72.4797 22.3728 74.8965 19.5839 76.9615 16.4435C78.8387 13.5843 78.8387 13.6077 78.1113 18.3418C77.3369 23.4275 76.4687 26.2866 74.5915 30.0364C73.254 32.7316 71.8461 34.6299 69.218 37.3485C65.9563 40.6999 62.2254 42.9732 57.4385 44.4965C53.8718 45.6449 52.3935 45.8324 47.2546 45.8324C43.3594 45.8324 42.1158 45.7386 39.9805 45.2933C32.2604 43.7466 25.3382 40.9577 19.4015 36.9735C15.0839 34.0909 12.5028 31.7004 9.80427 27.9975C6.80073 23.9196 4.36038 17.2403 3.72682 11.475C3.37485 8.1471 3.1402 7.32683 2.43624 7.13934C0.770217 6.71749 0.183578 7.77211 0.0193217 11.5219C-0.26226 18.5996 2.55356 27.1304 7.17619 33.1066C13.8403 41.7545 25.432 48.4103 38.901 51.2696C41.6465 51.8555 42.2566 51.9023 47.4893 51.9023C52.3935 51.9023 53.426 51.832 55.5144 51.3867C62.2723 49.9337 68.5375 46.6292 72.949 42.1998C76.0464 39.1296 78.1113 36.2939 79.8946 32.7081C82.1942 28.0912 83.5317 23.3103 84.2591 17.17C84.3999 15.8576 84.6111 14.7795 84.7284 14.7795C84.8223 14.7795 85.4559 15.1311 86.1364 15.5763C88.037 16.7716 90.3835 17.8965 93.5748 19.0918C96.813 20.3339 97.3996 20.287 96.4141 18.9512C94.9123 16.9122 90.055 11.5219 87.1219 8.63926C84.0949 5.66288 83.8368 5.33477 83.5552 4.1864C83.3909 3.48332 83.0155 2.68649 82.6401 2.31151C82.0065 1.6553 80.4109 1.04595 79.9885 1.30375C79.8712 1.37406 79.2845 1.11626 78.6744 0.717845C77.2431 -0.172727 75.7413 -0.243024 74.568 0.553803Z"
            fill="currentColor"
          />
        </svg>
      </span>
      <span class="arrow arrow--move">
        <span>move these</span>
        <svg
          viewBox="0 0 45 119"
          fill="none"
          xmlns="http://www.w3.org/2000/svg"
        >
          <path
            fill-rule="evenodd"
            clip-rule="evenodd"
            d="M41.9623 0.226546C41.9154 0.320411 41.329 1.82224 40.6723 3.55873C40.039 5.29523 38.1628 9.73034 36.5444 13.4145C31.6425 24.4436 29.8835 28.8084 24.0669 44.2726C19.8921 55.3486 13.4187 75.7642 8.72794 92.6129L7.2269 97.9867L7.08616 94.8422C6.82816 89.3511 5.89001 87.333 3.52116 87.333C2.51263 87.333 1.71519 88.1544 1.45719 89.4919C1.33992 90.0551 1.08195 93.0823 0.894318 96.2502C0.706686 99.4181 0.448692 103.572 0.307967 105.519C0.190697 107.444 0.0499847 110.682 0.0265307 112.677C-0.0438314 115.985 0.00303082 116.384 0.448657 117.135C1.43373 118.825 3.28661 119.435 5.09257 118.684C6.03073 118.285 6.94542 117.206 9.713 113.263C13.9816 107.185 18.907 101.272 23.1991 97.0481C28.0775 92.2609 28.3355 91.7212 25.0754 93.1996C21.0647 94.983 16.6085 97.9867 12.7386 101.483C11.519 102.586 10.487 103.454 10.4401 103.407C10.3463 103.314 13.8409 91.0172 17.101 80.0585C19.7513 71.1883 22.7065 61.6141 24.747 55.419C27.5615 46.8069 34.6681 27.3065 38.2331 18.4598C41.7043 9.82421 43.4399 4.96671 43.9325 2.54969C44.167 1.37638 44.1435 1.11826 43.8386 0.602C43.4633 0.038811 42.2437 -0.219311 41.9623 0.226546Z"
            fill="currentColor"
          />
        </svg>
      </span>
    </div>
    <a
      aria-label="Follow Jhey"
      class="bear-link"
      href="https://twitter.com/intent/follow?screen_name=jh3yy"
      target="_blank"
      rel="noreferrer noopener"
    >
      <svg
        class="w-9"
        viewBox="0 0 969 955"
        fill="none"
        xmlns="http://www.w3.org/2000/svg"
      >
        <circle
          cx="161.191"
          cy="320.191"
          r="133.191"
          stroke="currentColor"
          stroke-width="20"
        ></circle>
        <circle
          cx="806.809"
          cy="320.191"
          r="133.191"
          stroke="currentColor"
          stroke-width="20"
        ></circle>
        <circle
          cx="695.019"
          cy="587.733"
          r="31.4016"
          fill="currentColor"
        ></circle>
        <circle
          cx="272.981"
          cy="587.733"
          r="31.4016"
          fill="currentColor"
        ></circle>
        <path
          d="M564.388 712.083C564.388 743.994 526.035 779.911 483.372 779.911C440.709 779.911 402.356 743.994 402.356 712.083C402.356 680.173 440.709 664.353 483.372 664.353C526.035 664.353 564.388 680.173 564.388 712.083Z"
          fill="currentColor"
        ></path>
        <rect
          x="310.42"
          y="448.31"
          width="343.468"
          height="51.4986"
          fill="#FF1E1E"
        ></rect>
        <path
          fill-rule="evenodd"
          clip-rule="evenodd"
          d="M745.643 288.24C815.368 344.185 854.539 432.623 854.539 511.741H614.938V454.652C614.938 433.113 597.477 415.652 575.938 415.652H388.37C366.831 415.652 349.37 433.113 349.37 454.652V511.741L110.949 511.741C110.949 432.623 150.12 344.185 219.845 288.24C289.57 232.295 384.138 200.865 482.744 200.865C581.35 200.865 675.918 232.295 745.643 288.24Z"
          fill="currentColor"
        ></path>
      </svg>
    </a>
@import url('https://unpkg.com/normalize.css') layer(normalize);
@import url('https://fonts.googleapis.com/css2?family=Gloria+Hallelujah&display=swap');

@layer normalize, base, demo, popover;

@layer popover {
  .placeholder {
    width: var(--width);
    aspect-ratio: 1;
    display: grid;
    place-items: center;
    bottom: -1px;
    left: -1px;
    position: absolute;

    svg {
      width: 20px;
      height: 20px;
    }
  }

  [popover] {
    width: 380px;
    max-width: calc(100% - 2rem);
    height: 120px;
    border-radius: 6px;
    margin: 0;
    inset: unset;
    padding: 0.25rem;
    opacity: 0;
    border-color: light-dark(hsl(0 0% 75%), hsl(0 0% 60%));
    border-width: 1px;
    background: canvasText;
    color: canvas;
    --shadow-color: 0 0% 0%;
    box-shadow: 0px 0.5px 0.6px hsl(var(--shadow-color) / 0.07),
      0px 1.7px 2.2px -0.4px hsl(var(--shadow-color) / 0.09),
      0px 3.2px 4.1px -0.7px hsl(var(--shadow-color) / 0.11),
      -0.1px 6.1px 7.8px -1.1px hsl(var(--shadow-color) / 0.13),
      -0.2px 11.2px 14.3px -1.5px hsl(var(--shadow-color) / 0.15);

    .popover__content {
      display: flex;
      flex-direction: column;
      gap: 0.25em;
      height: 100%;
      width: 100%;
      filter: blur(4px);
      opacity: 0;
      width: calc(380px - 0.5em - 2px);
      max-width: calc(100vw - 2.5rem - 2px);
    }

    &:popover-open {
      display: flex;
      flex-direction: column;
    }

    .actions {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 2rem;
      padding-left: 2rem;
      width: 100%;

      .primary,
      .secondary {
        display: flex;
        align-items: center;
      }

      .primary {
        gap: 0 0.25rem;
      }

      .primary button:first-of-type,
      .secondary button {
        background: #0000;
      }

      button {
        cursor: pointer;
        width: 32px;
        aspect-ratio: 1;
        display: grid;
        place-items: center;
        padding: 0;
        border: 0;
        border-radius: 6px;
        position: relative;

        &:not([aria-label='Submit'])::after {
          content: '';
          border-radius: 6px;
          position: absolute;
          inset: 0;
          background: red;
          background: color-mix(in oklch, canvasText, #0000 90%);
          opacity: 0;
        }

        &:is(:hover, :focus-visible)::after {
          opacity: 1;
        }

        &:is(:hover, :focus-visible) svg {
          opacity: 1;
        }

        svg {
          width: 16px;
          opacity: 0.5;
        }
      }
      button[aria-label='Submit'] {
        svg {
          opacity: 1;
        }

        &:is(:hover, :focus-visible) {
          background: color-mix(in oklch, canvasText, canvas 30%);
        }
      }
    }

    textarea {
      width: 100%;
      flex: 1;
      resize: none;
      outline-color: color-mix(in oklch, canvas, canvasText 2%);
      outline-color: #0000;
      font-size: 0.875rem;
      font-weight: 400;
      scrollbar-color: hsl(10 90% 50%) #0000;
      background: #0000;
      border-radius: 2px;
      caret-color: red;
      padding: 0.5em;
      border: 0;

      &::-moz-placeholder {
        white-space: nowrap;
        opacity: 0.8;
      }

      &:-ms-input-placeholder {
        white-space: nowrap;
        opacity: 0.8;
      }

      &::placeholder {
        white-space: nowrap;
        opacity: 0.8;
      }
    }
  }
}

@layer demo {
  .arrow {
    display: inline-block;
    opacity: 0.8;
    position: fixed;
    font-size: 0.875rem;
    font-family: 'Gloria Hallelujah', cursive;
    transition: opacity 0.26s ease-out;

    svg {
      color: hsl(0 0% 65%);
    }

    &.arrow--debug {
      top: 200px;
      right: 0px;
      translate: -50% 0;
      width: 60px;
      span {
        rotate: 12deg;
      }
      svg {
        rotate: 20deg;
        bottom: 130%;
        left: 0%;
        width: 100%;
        scale: -1 1;
      }
    }

    &.arrow--move {
      opacity: 0;
      top: 5.5rem;
      left: 50%;
      translate: calc((var(--snap-proximity) * -1px) + -150%) 0;
      width: 60px;
      span {
        rotate: -12deg;
      }
      svg {
        rotate: 270deg;
        top: 0%;
        left: 100%;
        width: 50%;
        scale: -1 1;
        translate: 180% -70%;
      }
    }

    &.arrow--instruction {
      top: 50%;
      left: 50%;
      translate: -130% -70%;

      svg {
        scale: 1 1;
        top: 130%;
        rotate: 25deg;
        left: 0%;
        width: 60%;
        translate: 120% 30%;
      }
    }

    span {
      display: inline-block;
      white-space: nowrap;
    }

    svg {
      position: absolute;
    }
  }
  [data-debug='true'] .arrow--move {
    opacity: 0.8;
  }
  :root {
    --width: 42px;
  }
  [data-dragging='true'] {
    cursor: -webkit-grabbing;
    cursor: grabbing;
  }
  [data-debug='true'] .target {
    opacity: 1;
  }
  .submit {
    background: canvasText;
    color: canvas;
  }
  .toggle {
    width: var(--width);
    aspect-ratio: 1;
    border-radius: 50%;
    display: grid;
    place-items: center;
    padding: 0;
    position: fixed;
    top: 0;
    left: 0;
    color: canvas;
    background: canvasText;
    border-style: solid;
    border-color: color-mix(in oklch, canvasText, #0000 85%);
    border-width: 1px;
    --shadow-color: 0 0% 0%;
    box-shadow: 0px 0.5px 0.6px hsl(var(--shadow-color) / 0.07),
      0px 1.7px 2.2px -0.4px hsl(var(--shadow-color) / 0.09),
      0px 3.2px 4.1px -0.7px hsl(var(--shadow-color) / 0.11),
      -0.1px 6.1px 7.8px -1.1px hsl(var(--shadow-color) / 0.13),
      -0.2px 11.2px 14.3px -1.5px hsl(var(--shadow-color) / 0.15);

    svg {
      width: 20px;
      height: 20px;
    }
  }
  .targets {
    position: fixed;
    inset: 1.5rem;
    pointer-events: none;
  }
  .target {
    pointer-events: all;
    width: var(--width);
    aspect-ratio: 1;
    background: hsl(var(--hue, 10) 80% 50% / 0.2);
    border-radius: 50%;
    opacity: 0;
    transition: opacity 0.26s ease-out;
    position: fixed;

    &[data-active='true'] {
      --hue: 150;
    }

    &::after {
      content: '';
      width: max(var(--width), var(--snap-proximity) * 2px);
      aspect-ratio: 1;
      border-radius: 50%;
      background: hsl(var(--hue, 10) 80% 50% / 0.1);
      outline: 2px dashed hsl(var(--hue, 10) 80% 50% / 0.5);
      position: absolute;
      top: 50%;
      left: 50%;
      translate: -50% -50%;
      pointer-events: none;
    }

    &.target--north {
      top: 1.5rem;
      left: 50%;
      translate: -50% 0%;
    }
    &.target--west {
      left: 1.5rem;
      top: 50%;
      translate: 0% -50%;
    }
    &.target--south-west {
      bottom: 1.5rem;
      left: 1.5rem;
    }
    &.target--south {
      bottom: 1.5rem;
      left: 50%;
      translate: -50% 0;
    }
    &.target--east {
      top: 50%;
      right: 1.5rem;
      translate: 0 -50%;
    }
    &.target--south-east {
      bottom: 1.5rem;
      right: 1.5rem;
    }
  }
}

@layer base {
  :root {
    --font-size-min: 16;
    --font-size-max: 20;
    --font-ratio-min: 1.2;
    --font-ratio-max: 1.33;
    --font-width-min: 375;
    --font-width-max: 1500;
  }

  html {
    color-scheme: light dark;
  }

  [data-theme='light'] {
    color-scheme: light only;
  }

  [data-theme='dark'] {
    color-scheme: dark only;
  }

  :where(.fluid) {
    --fluid-min: calc(
      var(--font-size-min) * pow(var(--font-ratio-min), var(--font-level, 0))
    );
    --fluid-max: calc(
      var(--font-size-max) * pow(var(--font-ratio-max), var(--font-level, 0))
    );
    --fluid-preferred: calc(
      (var(--fluid-max) - var(--fluid-min)) /
        (var(--font-width-max) - var(--font-width-min))
    );
    --fluid-type: clamp(
      (var(--fluid-min) / 16) * 1rem,
      ((var(--fluid-min) / 16) * 1rem) -
        (((var(--fluid-preferred) * var(--font-width-min)) / 16) * 1rem) +
        (var(--fluid-preferred) * var(--variable-unit, 100vi)),
      (var(--fluid-max) / 16) * 1rem
    );
    font-size: var(--fluid-type);
  }

  *,
  *:after,
  *:before {
    box-sizing: border-box;
  }

  body {
    background: light-dark(#fff, #000);
    display: grid;
    place-items: center;
    min-height: 100vh;
    font-family: 'SF Pro Text', 'SF Pro Icons', 'AOS Icons', 'Helvetica Neue',
      Helvetica, Arial, sans-serif, system-ui;
  }

  body::before {
    --size: 45px;
    --line: color-mix(in hsl, canvasText, transparent 80%);
    content: '';
    height: 100vh;
    width: 100vw;
    position: fixed;
    background: linear-gradient(
          90deg,
          var(--line) 1px,
          transparent 1px var(--size)
        )
        calc(var(--size) * 0.36) 50% / var(--size) var(--size),
      linear-gradient(var(--line) 1px, transparent 1px var(--size)) 0%
        calc(var(--size) * 0.32) / var(--size) var(--size);
    -webkit-mask: linear-gradient(-20deg, transparent 50%, white);
            mask: linear-gradient(-20deg, transparent 50%, white);
    top: 0;
    transform-style: flat;
    pointer-events: none;
    z-index: -1;
  }

  .bear-link {
    color: canvasText;
    position: fixed;
    top: 1rem;
    left: 1rem;
    width: 48px;
    aspect-ratio: 1;
    display: grid;
    place-items: center;
    opacity: 0.8;
  }

  :where(.x-link, .bear-link):is(:hover, :focus-visible) {
    opacity: 1;
  }

  .bear-link svg {
    width: 75%;
  }

  /* Utilities */
  .sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
  }
}
import { Pane } from 'https://esm.sh/[email protected]';
import gsap from 'https://esm.sh/[email protected]';
import { Draggable } from 'https://esm.sh/[email protected]/Draggable';
import { Flip } from 'https://esm.sh/[email protected]/Flip';

// use dynamic loading for the restricted InertiaPlugin
let InertiaPlugin;

const initApp = async () => {
  try {
    const module = await import('https://assets.codepen.io/16327/InertiaPlugin.min.js');
    InertiaPlugin = module.default || window.InertiaPlugin;
  } catch (e) {
    // fallback if esm import is blocked
    InertiaPlugin = window.InertiaPlugin;
  }

  gsap.registerPlugin(Draggable, InertiaPlugin, Flip);

  const config = {
    theme: 'system',
    proximity: 120,
    debug: false,
    duration: 0.35
  };

  const ctrl = new Pane({
    title: 'config',
    expanded: true
  });

  const update = () => {
    document.documentElement.dataset.theme = config.theme;
    document.documentElement.dataset.debug = config.debug;
    document.documentElement.style.setProperty('--snap-proximity', config.proximity);
  };

  const sync = event => {
    if (event.target.controller.view.labelElement.innerText === 'debug') {
      document.querySelector('.arrow--debug').style.opacity = 0;
    }
    if (!document.startViewTransition || event.target.controller.view.labelElement.innerText !== 'theme') {
      return update();
    }
    document.startViewTransition(() => update());
  };

  ctrl.addBinding(config, 'proximity', {
    min: 0,
    max: 300,
    step: 1,
    label: 'proximity'
  });

  ctrl.addBinding(config, 'duration', {
    min: 0.2,
    max: 5,
    step: 0.01,
    label: 'duration(s)'
  });

  ctrl.addBinding(config, 'debug', {
    label: 'debug'
  });

  ctrl.addBinding(config, 'theme', {
    label: 'theme',
    options: {
      System: 'system',
      Light: 'light',
      Dark: 'dark'
    }
  });

  ctrl.on('change', sync);
  update();

  const button = document.querySelector('[aria-label^="Start"]');
  const targets = document.querySelectorAll('.target');

  function getClosestPoint(target, maxDistance = Number.POSITIVE_INFINITY) {
    if (maxDistance !== Number.POSITIVE_INFINITY) {
      document.documentElement.style.setProperty('--snap-proximity', maxDistance);
    }
    let closest = null;
    let minDistance = Number.POSITIVE_INFINITY;

    const coordinates = Array.from(targets).map(el => {
      const rect = el.getBoundingClientRect();
      return {
        x: rect.left + rect.width / 2,
        y: rect.top + rect.height / 2,
        element: el
      };
    });

    for (const coord of coordinates) {
      const dx = Math.min(window.innerWidth, Math.max(0, target.x)) - coord.x;
      const dy = Math.min(window.innerHeight, Math.max(0, target.y)) - coord.y;
      const distance = Math.hypot(dx, dy);
      if (distance < minDistance) {
        minDistance = distance;
        closest = coord;
      }
    }

    if (minDistance <= maxDistance) {
      return {
        coordinate: closest,
        distance: minDistance
      };
    }

    return null;
  }

  const RESISTANCE_PIXELS = 80;
  const DEFAULT_RESISTANCE = 0.75;
  const END_RESISTANCE = 0;
  gsap.set(button, {
    x: window.innerWidth * 0.5,
    y: window.innerHeight * 0.5,
    yPercent: -50,
    xPercent: -50
  });

  for (const target of targets) {
    Draggable.create(target, {
      inertia: false,
      type: 'x,y',
      onDrag: () => {
        document.querySelector('.arrow--move').style.opacity = 0;
      }
    });
  }

  Draggable.create(button, {
    inertia: true,
    allowContextMenu: true,
    type: 'x,y',
    dragResistance: DEFAULT_RESISTANCE,
    resistance: 1800,
    snap: {
      points: function (point) {
        const { isDragging, __unlocked, startX, startY } = this;
        const closestPoint = getClosestPoint(point, config.proximity);
        if (!isDragging && !__unlocked) {
          return { x: startX, y: startY };
        } else if (__unlocked && closestPoint) {
          for (const t of targets) t.dataset.active = false;
          closestPoint.coordinate.element.dataset.active = true;
          return closestPoint.coordinate;
        }
        return point;
      }
    },
    bounds: '.targets',
    onDragStart: function (event) {
      const bounds = this.target.getBoundingClientRect();
      const currentPoint = {
        x: bounds.left + bounds.width / 2,
        y: bounds.top + bounds.height / 2
      };

      this.__start = currentPoint;
      this.dragResistance = DEFAULT_RESISTANCE;
      this.__unlocked = false;
      document.documentElement.dataset.dragging = true;
    },
    onDrag: function (event) {
      const { startX, startY, x, y } = this;
      const distance = Math.hypot(x - startX, y - startY);
      const newResistance = gsap.utils.clamp(
        END_RESISTANCE,
        DEFAULT_RESISTANCE,
        gsap.utils.mapRange(0, RESISTANCE_PIXELS, DEFAULT_RESISTANCE, END_RESISTANCE)(Math.abs(distance))
      );

      if (!this.__unlocked) this.dragResistance = newResistance;
      if (!this.__unlocked && newResistance === END_RESISTANCE) {
        this.__unlocked = true;
        document.querySelector('.arrow--instruction').style.opacity = 0;
        for (const t of targets) t.dataset.active = false;
      }
    },
    onDragEnd: function () {
      this.dragResistance = DEFAULT_RESISTANCE;
      this.__unlocked = false;
    },
    onRelease: () => {
      document.documentElement.dataset.dragging = false;
    },
    onThrowComplete: function () {
      this.dragResistance = DEFAULT_RESISTANCE;
      this.__unlocked = false;
    }
  });

  const pop = document.querySelector('[popover]');
  let f;

  const closePopover = async () => {
    if (f) {
      f.pause();
      await f.reverse(f.time());
      pop.hidePopover();
    } else {
      let closerBounds;
      const pos = pop.getBoundingClientRect();
      const center = {
        x: pos.x + pos.width * 0.5,
        y: pos.y + pos.height * 0.5
      };

      const {
        x: buttonX,
        y: buttonY,
        width: buttonWidth,
        height: buttonHeight
      } = button.getBoundingClientRect();
      const closest = getClosestPoint({ x: center.x, y: center.y }, config.proximity);

      if (closest) {
        closerBounds = closest.coordinate.element.getBoundingClientRect();
        gsap.set(button, {
          opacity: 0,
          x: closest.coordinate.x,
          y: closest.coordinate.y
        });
      }

      const state = Flip.getState(
        [pop, '.placeholder', '.placeholder > svg', '[popover] .popover__content'],
        { nested: true, props: 'borderRadius, scale, opacity, filter, backgroundColor, color' }
      );

      gsap.set(pop, {
        width: buttonWidth,
        height: buttonHeight,
        top: closest ? closerBounds.top + closerBounds.height * 0.5 : buttonY + buttonHeight * 0.5,
        left: closest ? closerBounds.left + closerBounds.width * 0.5 : buttonX + buttonWidth * 0.5,
        opacity: 1,
        borderRadius: '21px',
        x: 0,
        y: 0,
        xPercent: -50,
        yPercent: -50,
        backgroundColor: getComputedStyle(document.body).color,
        color: getComputedStyle(document.body).backgroundColor
      });

      gsap.set('.placeholder > svg', {
        width: 20,
        height: 20,
        opacity: 1
      });

      gsap.set('[popover] .popover__content', {
        y: 0,
        opacity: 0,
        filter: 'blur(4px)'
      });

      await Flip.from(state, {
        duration: config.duration,
        nested: true,
        ease: 'power2.inOut'
      });

      gsap.set(button, { opacity: 1 });
      pop.hidePopover();
    }
  };

  let d;

  pop.addEventListener('toggle', async event => {
    if (event.newState === 'open') {
      const {
        x: buttonX,
        y: buttonY,
        width: buttonWidth,
        height: buttonHeight
      } = button.getBoundingClientRect();
      const center = {
        x: buttonX + buttonWidth * 0.5,
        y: buttonY + buttonHeight * 0.5
      };

      const {
        x: popX,
        y: popY,
        width: popWidth,
        height: popHeight
      } = pop.getBoundingClientRect();

      let vertical = 'center';
      if (center.y < popHeight * 0.5 + 24) vertical = 'bottom';
      if (center.y > window.innerHeight - (popHeight * 0.5 + 24)) vertical = 'top';
      let horizontal = 'center';
      if (center.x < popWidth * 0.5) horizontal = 'left';
      if (center.x > window.innerWidth - popWidth * 0.5) horizontal = 'right';

      gsap.set('[popovertarget]', {
        boxShadow: 'none'
      });

      gsap.set(pop, {
        width: buttonWidth,
        height: buttonHeight,
        top: buttonY,
        left: buttonX,
        opacity: 1,
        borderRadius: '21px'
      });

      const state = Flip.getState(
        [pop, '.placeholder', '.placeholder > svg', '[popover] .popover__content'],
        { nested: true, props: 'borderRadius, scale, opacity, filter, backgroundColor, color' }
      );

      const position = {
        left: center.x,
        top: center.y,
        xPercent: -50,
        yPercent: -50
      };

      if (horizontal === 'left') {
        position.right = 'unset';
        position.left = '1.5rem';
        position.xPercent = 0;
      }
      if (horizontal === 'right') {
        position.left = 'unset';
        position.right = '1.5rem';
        position.xPercent = 0;
      }
      if (vertical === 'bottom') {
        position.top = '1.5rem';
        position.bottom = 'unset';
        position.yPercent = 0;
      }
      if (vertical === 'top') {
        position.bottom = '1.5rem';
        position.top = 'unset';
        position.yPercent = 0;
      }

      gsap.set(pop, { clearProps: 'width,height' });
      gsap.set(pop, {
        ...position,
        opacity: 1,
        borderRadius: '6px',
        backgroundColor: getComputedStyle(document.body).backgroundColor,
        color: getComputedStyle(document.body).color
      });

      gsap.set('.placeholder > svg', {
        width: 16,
        height: 16,
        opacity: 0.5
      });

      gsap.set('[popover] .popover__content', {
        y: 0,
        opacity: 1,
        filter: 'blur(0px)',
        background: '#0000'
      });

      f = Flip.from(state, {
        duration: config.duration,
        nested: true,
        ease: 'power2.inOut'
      });

      window.addEventListener('keydown', closePopover);
      d = Draggable.create(pop, {
        dragClickables: false,
        inertia: true,
        allowContextMenu: true,
        type: 'x,y',
        bounds: '.targets',
        onDrag: () => {
          f = undefined;
          const pos = pop.getBoundingClientRect();
          const center = {
            x: pos.x + pos.width * 0.5,
            y: pos.y + pos.height * 0.5,
            xPercent: -50,
            yPercent: -50
          };

          gsap.set(button, {
            x: center.x,
            y: center.y,
            xPercent: -50,
            yPercent: -50
          });
        },
        onThrowUpdate: () => {
          f = undefined;
          const pos = pop.getBoundingClientRect();
          const center = {
            x: pos.x + pos.width * 0.5,
            y: pos.y + pos.height * 0.5
          };

          gsap.set(button, {
            x: center.x,
            y: center.y
          });
        }
      });
    } else {
      gsap.set([pop, '.placeholder > svg', '[popover] .popover__content'], {
        clearProps: 'all'
      });

      gsap.set(button, {
        clearProps: 'box-shadow',
        opacity: 1
      });

      window.removeEventListener('keydown', closePopover);
    }
  });

  document.querySelector('[aria-label="Minimize"]').addEventListener('click', closePopover);
};

initApp();
Interactive responsive grid of neon mathematical symbols that spin and glow upon pointer hover, built with GSAP and Tweakpane.

Interactive Touch Hover Grid on GSAP

This grid hover sandbox delivers slick cursor tracking without a bloated library. It dynamically generates a responsive CSS grid of “+” markers that rotate, brighten, and fade on hover. To maintain seamless feedback on mobile, a Pointer Events API fallback uses elementFromPoint to track touch vectors. It also integrates draggable, double-click resettable Tweakpane configs. (Requires: gsap, gsap-draggable, tweakpane)

Technologies:
HTML CSS JavaScript
Difficulty: Intermediate
Browser Support (as of Jul 2026):
Chrome Chrome Edge Edge Firefox Firefox Safari Safari
Features:
Pointer Hover Tracing CSS Nesting Layers Tweakpane Bindings Touch Fallbacks
Code by: Jhey Jhey
License: MIT
Loading...
<main>
  <h1 class="fluid">hey.</h1>
  <div class="grid"></div>
</main>
<a
  aria-label="Follow Jhey"
  class="bear-link"
  href="https://twitter.com/intent/follow?screen_name=jh3yy"
  target="_blank"
  rel="noreferrer noopener"
>
  <svg
    class="w-9"
    viewBox="0 0 969 955"
    fill="none"
    xmlns="http://www.w3.org/2000/svg"
  >
    <circle
      cx="161.191"
      cy="320.191"
      r="133.191"
      stroke="currentColor"
      stroke-width="20"
    ></circle>
    <circle
      cx="806.809"
      cy="320.191"
      r="133.191"
      stroke="currentColor"
      stroke-width="20"
    ></circle>
    <circle
      cx="695.019"
      cy="587.733"
      r="31.4016"
      fill="currentColor"
    ></circle>
    <circle
      cx="272.981"
      cy="587.733"
      r="31.4016"
      fill="currentColor"
    ></circle>
    <path
      d="M564.388 712.083C564.388 743.994 526.035 779.911 483.372 779.911C440.709 779.911 402.356 743.994 402.356 712.083C402.356 680.173 440.709 664.353 483.372 664.353C526.035 664.353 564.388 680.173 564.388 712.083Z"
      fill="currentColor"
    ></path>
    <rect
      x="310.42"
      y="448.31"
      width="343.468"
      height="51.4986"
      fill="#FF1E1E"
    ></rect>
    <path
      fill-rule="evenodd"
      clip-rule="evenodd"
      d="M745.643 288.24C815.368 344.185 854.539 432.623 854.539 511.741H614.938V454.652C614.938 433.113 597.477 415.652 575.938 415.652H388.37C366.831 415.652 349.37 433.113 349.37 454.652V511.741L110.949 511.741C110.949 432.623 150.12 344.185 219.845 288.24C289.57 232.295 384.138 200.865 482.744 200.865C581.35 200.865 675.918 232.295 745.643 288.24Z"
      fill="currentColor"
    ></path>
  </svg>
</a>
@import url("https://unpkg.com/normalize.css") layer(normalize);

@layer normalize, base, demo, mobile;

@layer mobile {
  .grid div[data-hover] {
    transition-property: opacity, rotate, filter;
    transition-duration: 0s;
    rotate: calc(var(--grade, 0) * 90deg);
    filter: grayscale(0) brightness(1.5);
    opacity: 1;
  }
}

@layer demo {
  h1 {
    --font-level: 5;
    translate: 12px;
    margin: 0;
    margin-bottom: 1rem;
    color: color-mix(in hsl, canvasText, canvas 25%);
  }
  .grid {
    touch-action: none;
    display: grid;
    grid-template: repeat(var(--rows, 10), 1fr) / repeat(var(--cols, 10), 1fr);
    font-size: 2rem;
    font-weight: 600;
    line-height: 1;
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    cursor: none;

    div {
      touch-action: none;
      padding: 2px;
      opacity: calc(var(--opacity) * 0.5);
      aspect-ratio: 1;
      display: grid;
      place-items: center;
      transition-property: opacity, rotate, filter;
      transition-duration: 0.8s, 0.4s, 0.6s;
      transition-timing-function: ease-in, ease-out, ease-out;
      scale: 1.5;
      filter: grayscale(1);
      color: hsl(var(--hue) 80% 50%);

      @media (prefers-color-scheme: dark) {
        opacity: calc(var(--opacity) + 0.2);
      }
      @media (hover: hover) and (pointer: fine) {
        &:hover {
          transition-property: opacity, rotate, filter;
          transition-duration: 0s;
          rotate: calc(var(--grade, 0) * 90deg);
          filter: grayscale(0) brightness(1.5);
          opacity: 1;
        }
      }
    }
  }
  [data-theme="dark"] .grid div {
    opacity: calc(var(--opacity) + 0.2);
    @media (hover: hover) and (pointer: fine) {
      &:hover {
        opacity: 1;
      }
    }
  }
}

@layer base {
  :root {
    --font-size-min: 16;
    --font-size-max: 20;
    --font-ratio-min: 1.2;
    --font-ratio-max: 1.33;
    --font-width-min: 375;
    --font-width-max: 1500;
  }

  html {
    color-scheme: light dark;
  }

  [data-theme="light"] {
    color-scheme: light only;
  }

  [data-theme="dark"] {
    color-scheme: dark only;
  }

  :where(.fluid) {
    --fluid-min: calc(
      var(--font-size-min) * pow(var(--font-ratio-min), var(--font-level, 0))
    );
    --fluid-max: calc(
      var(--font-size-max) * pow(var(--font-ratio-max), var(--font-level, 0))
    );
    --fluid-preferred: calc(
      (var(--fluid-max) - var(--fluid-min)) /
        (var(--font-width-max) - var(--font-width-min))
    );
    --fluid-type: clamp(
      (var(--fluid-min) / 16) * 1rem,
      ((var(--fluid-min) / 16) * 1rem) -
        (((var(--fluid-preferred) * var(--font-width-min)) / 16) * 1rem) +
        (var(--fluid-preferred) * var(--variable-unit, 100vi)),
      (var(--fluid-max) / 16) * 1rem
    );
    font-size: var(--fluid-type);
  }

  *,
  *:after,
  *:before {
    box-sizing: border-box;
  }

  body {
    overflow-x: hidden;
    background: light-dark(#fff, #000);
    display: grid;
    place-items: center;
    min-height: 100vh;
    font-family: "SF Pro Text", "SF Pro Icons", "AOS Icons", "Helvetica Neue",
      Helvetica, Arial, sans-serif, system-ui;
  }

  body::before {
    --size: 45px;
    --line: color-mix(in hsl, canvasText, transparent 80%);
    content: "";
    height: 100vh;
    width: 100vw;
    position: fixed;
    background: linear-gradient(
          90deg,
          var(--line) 1px,
          transparent 1px var(--size)
        )
        calc(var(--size) * 0.36) 50% / var(--size) var(--size),
      linear-gradient(var(--line) 1px, transparent 1px var(--size)) 0%
        calc(var(--size) * 0.32) / var(--size) var(--size);
    -webkit-mask: linear-gradient(-20deg, transparent 50%, white);
    mask: linear-gradient(-20deg, transparent 50%, white);
    top: 0;
    transform-style: flat;
    pointer-events: none;
    z-index: -1;
  }

  .bear-link {
    color: canvasText;
    position: fixed;
    top: 1rem;
    left: 1rem;
    width: 48px;
    aspect-ratio: 1;
    display: grid;
    place-items: center;
    opacity: 0.8;
  }

  :where(.x-link, .bear-link):is(:hover, :focus-visible) {
    opacity: 1;
  }

  .bear-link svg {
    width: 75%;
  }

  /* Utilities */
  .sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
  }
}

div.tp-dfwv {
  width: 256px;
  position: fixed;
}
import gsap from "https://esm.sh/[email protected]";
import Draggable from "https://esm.sh/[email protected]/Draggable";
import { Pane } from "https://esm.sh/[email protected]";
gsap.registerPlugin(Draggable);

const config = {
  theme: "system",
  cols: 20,
  rows: 10
};

const ctrl = new Pane({
  title: "config",
  expanded: true
});

const grid = document.querySelector(".grid");
const buildGrid = () => {
  grid.innerHTML = new Array(config.cols * config.rows)
    .fill(0)
    .map(
      (_, index) => `
    <div style="
      --grade: ${Math.floor(Math.random() * 12 - 6)};
      --opacity: ${Math.min(Math.random(), 0.2)};
      --hue: ${Math.floor(Math.random() * 30)};
    ">+</div>
  `
    )
    .join("");
  grid.style.setProperty("--cols", config.cols);
  grid.style.setProperty("--rows", config.rows);
};
buildGrid();

const update = () => {
  document.documentElement.dataset.theme = config.theme;
};

const sync = (event) => {
  if (
    !document.startViewTransition ||
    event.target.controller.view.labelElement.innerText !== "theme"
  )
    return update();
  document.startViewTransition(() => update());
};

ctrl
  .addBinding(config, "cols", {
    min: 5,
    max: 30,
    step: 1
  })
  .on("change", buildGrid);
ctrl
  .addBinding(config, "rows", {
    min: 5,
    max: 30,
    step: 1
  })
  .on("change", buildGrid);

ctrl.addBinding(config, "theme", {
  label: "theme",
  options: {
    system: "system",
    light: "light",
    dark: "dark"
  }
});

ctrl.on("change", sync);
update();

// make tweakpane panel draggable
const tweakClass = "div.tp-dfwv";
const d = Draggable.create(tweakClass, {
  type: "x,y",
  allowEventDefault: true,
  trigger: tweakClass + " button.tp-rotv_b"
});

document.querySelector(tweakClass).addEventListener("dblclick", () => {
  gsap.to(tweakClass, {
    x: `+=${d[0].x * -1}`,
    y: `+=${d[0].y * -1}`,
    onComplete: () => {
      gsap.set(tweakClass, { clearProps: "all" });
    }
  });
});

if (window.matchMedia("(hover: none) and (pointer: coarse)").matches) {
  grid.addEventListener(
    "pointermove",
    (event) => {
      var _document$querySelect;
      (_document$querySelect = document.querySelector("[data-hover]")) ===
        null || _document$querySelect === void 0
        ? void 0
        : _document$querySelect.removeAttribute("data-hover");
      document.elementFromPoint(event.x, event.y).dataset.hover = "true";
    },
    true
  );
  grid.addEventListener(
    "pointerleave",
    (event) => {
      var _document$querySelect2;
      (_document$querySelect2 = document.querySelector("[data-hover]")) ===
        null || _document$querySelect2 === void 0
        ? void 0
        : _document$querySelect2.removeAttribute("data-hover");
    },
    true
  );
}
Playful custom dark cookie consent panel with GSAP-powered bounce toggles, falling confetti, and custom preference states.

Playful Cookie Consent Widget

This delightful GDPR consent popup replaces sterile compliance panels with delightful, tactile interactions. Built using GSAP and canvas confetti physics, it features bouncy, spring-loaded toggle switches and a floating cookie icon that triggers state restoration. Preferences are kept persistently in localStorage, and it integrates an Escape keyboard listener for desktop accessibility. (Requires: gsap.js, font-awesome.css)

Technologies:
HTML CSS JavaScript
Difficulty: Intermediate
Browser Support (as of Jul 2026):
Chrome Chrome Edge Edge Firefox Firefox Safari Safari
Features:
Confetti Celebration GSAP Toggles Preference Persistence Responsive Design
Code by: tofjadesign tofjadesign
License: MIT
Hyper-realistic ticket UI replicating a printed invoice slipping out of a terminal slot with payment progress checkpoints.

Trip Invoice Card with Slotted Ticket Effect

This creative CSS-only component simulates a skeuomorphic paper invoice emerging from a card dispenser slot. It leverages relative positioning, absolute stacking, and linear gradient overlays to cast believable ticket-dispenser shadows over the receipt. The clean typography and status tracker create a tactical, mobile-focused travel checkout card.

Technologies:
HTML CSS
Difficulty: Beginner
Browser Support (as of Jul 2026):
Chrome Chrome Edge Edge Firefox Firefox Safari Safari
Features:
Slotted Ticket Illusion Depth Shadowing Progress Timeline Clean CSS Layout
License: MIT
Loading...
<section class="container">
  <section class="invoice-container">
    <div class="invoice-slot">
      <div class="slot-hole"></div>
    </div>
    <div class="invoice">
      <h2 class="title">Trip Invoice &mdash; Japan Summer 2025</h2>
      <p class="amount">
        Total <span class="value">$30,000</span>
      </p>
      <p class="amount">
        Per Person <span class="value">$6,000</span>
      </p>

      <hr />

      <ul class="payers-list">
        <li>
          <div class="payer-image-container">
            <img src="https://res.cloudinary.com/dmuyehme1/image/upload/v1761081494/user1_okmfkd.png" />
          </div>
          <p>
            You
            <span class="pay-tag"><i class="fa-solid fa-circle-check"></i> Paid</span>
          </p>
        </li>
        <li>
          <div class="payer-image-container">
            <img src="https://res.cloudinary.com/dmuyehme1/image/upload/v1761082627/user4_dujvoe.svg" />
          </div>
          <p>
            Olabode
            <span class="pay-tag"><i class="fa-solid fa-circle-check"></i> Paid</span>
          </p>
        </li>
        <li>
          <div class="payer-image-container">
            <img src="https://res.cloudinary.com/dmuyehme1/image/upload/v1761082286/user3_ue0zzq.avif" />
          </div>
          <p>
            Lukmon
            <span class="pay-tag"><i class="fa-solid fa-circle-check"></i> Paid</span>
          </p>
        </li>
        <li>
          <div class="payer-image-container">
            <img src="https://res.cloudinary.com/dmuyehme1/image/upload/v1761081494/user1_okmfkd.png" />
          </div>
          <p>
            Hope
            <span class="pay-tag"><i class="fa-solid fa-clock"></i> Unpaid</span>
          </p>
        </li>
        <li>
          <div class="payer-image-container">
            <img src="https://res.cloudinary.com/dmuyehme1/image/upload/v1761082184/user2_b821x7.avif" />
          </div>
          <p>
            Dara
            <span class="pay-tag"><i class="fa-solid fa-clock"></i> Unpaid</span>
          </p>
        </li>
      </ul>

      <div class="payment-status">
        <p class="heading">
          Payment Status
          <span>Unpaid</span>
        </p>
        <div class="status-progress">
          <div class="checkpoint">
            <i class="fa-solid fa-circle-check"></i>
          </div>
          <div class="checkpoint">
            <i class="fa-solid fa-circle-check"></i>
          </div>
          <div class="checkpoint">
            <i class="fa-solid fa-circle-check"></i>
          </div>
          <div class="checkpoint">
            <span class="circle"></span>
          </div>
          <div class="checkpoint">
            <i class="fa-solid fa-stamp"></i>
          </div>
        </div>
      </div>
      <div class="btn-group">
        <button class="btn reminder-btn">Send Reminder</button>
        <button class="btn download-btn">Download Invoice</button>
      </div>
    </div>
  </section>
  <hr />
  <div class="payment-info">
    <p>Payment Method</p>
    <div class="card-info">
      <p>Visa Ending 2986</p>
      <span class="card-icon"></span>
    </div>
  </div>
  <button class="pay-now-btn">Pay Now</button>
</section>
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: sans-serif;
}

.container {
  width: min(95%, 425px);
  margin: 1em auto;
}

/* ---- invoice ---- */
.invoice-container {
  position: relative;
  margin-bottom: 2em;
  height: 630px;
}

.invoice-slot {
  width: 100%;
  height: 120px;
  background-color: #2b2b2b;
  border: 2px solid #2c2c2c;
  border-radius: 1em;
  box-shadow: 0 0 1px 0 #000, 0 5px 15px 0 rgba(0, 0, 0, 0.45);
}

.slot-hole {
  background-color: #000;
  border-radius: 100vmax;
  width: 90%;
  height: 25px;
  margin: 1em auto;
  border: 1px solid #1b1b1b;
  box-shadow: 0 0 1px 0 #000, 0 5px 15px 0 rgba(0, 0, 0, 0.45);
}

.invoice {
  position: absolute;
  width: 85%;
  top: 1.5em;
  left: 50%;
  transform: translateX(-50%);
  background-color: #fff;
  color: #6b7280;
  padding: 1em;
  border-radius: 0.5em;
  box-shadow: 0 5px 25px 0 rgba(0, 0, 0, 0.15);
}

.invoice::before {
  content: "";
  position: absolute;
  width: 100%;
  height: 80px;
  left: 0;
  top: 0;
  background: linear-gradient(
    180deg,
    rgba(0, 0, 0, 0.95) 0%,
    rgba(0, 0, 0, 0.75) 10%,
    rgba(0, 0, 0, 0.65) 25%,
    rgba(0, 0, 0, 0.45) 40%,
    rgba(0, 0, 0, 0.25) 60%,
    transparent 100%
  );
}

.invoice .title {
  position: relative;
  font-size: 1.15rem;
  padding: 0.55em 0;
  letter-spacing: 0.5px;
  text-align: center;
  margin-bottom: 1.25em;
  font-weight: 500;
  color: #1b1b1b;
}

.invoice .title::before {
  content: "";
  position: absolute;
  height: 1.5px;
  width: 100%;
  top: 0;
  left: 0;
  background-image: repeating-linear-gradient(
    90deg,
    #1b1b1b,
    #1b1b1b 8px,
    transparent 8px,
    transparent 16px
  );
}

.invoice .title::after {
  content: "";
  position: absolute;
  height: 1.5px;
  width: 100%;
  bottom: 0;
  left: 0;
  background-image: repeating-linear-gradient(
    90deg,
    #1b1b1b,
    #1b1b1b 8px,
    transparent 8px,
    transparent 16px
  );
}

.invoice .amount,
.invoice .payment-status .heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 1rem;
  margin-bottom: 0.5em;
}

.invoice .amount .value {
  font-weight: 700;
  color: #000;
}

.invoice .payment-status {
  border: 1px solid #ddd;
  padding: 1em;
  border-radius: 15px;
  margin-top: 1em;
}

.invoice .payment-status .heading span {
  text-transform: uppercase;
  font-weight: 500;
  color: #000;
}

.payers-list {
  list-style-type: none;
  margin: 0.5em 0;
}

.payers-list li {
  border-bottom: 1px solid #eee;
  display: flex;
  align-items: center;
}

.payers-list li p {
  flex-grow: 1;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.9rem;
  padding: 0.5em;
}

.payers-list .payer-image-container {
  padding: 0.5em;
  border-right: 1px solid #eee;
}

.payers-list .payer-image-container img {
  width: 35px;
  border-radius: 50%;
}

.payers-list .pay-tag {
  border: 1px solid #ddd;
  border-radius: 8px;
  padding: 0.3em 0.5em;
}

.fa-circle-check {
  color: #22c55e;
}

.fa-clock {
  color: #d97706;
}

.btn-group {
  display: flex;
  align-items: center;
  gap: 0.75em;
  margin-top: 1.25em;
}

.status-progress {
  position: relative;
  margin: 1.5em 0 0.5em 0;
  height: 6px;
  background-image: linear-gradient(90deg, #000 75%, #eee 75%);
}

.checkpoint {
  position: absolute;
  background: rgba(255, 255, 255, 0.95);
  border: 2px solid red;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 0.5px solid #eee;
  display: flex;
  justify-content: center;
  align-items: center;
  box-shadow: 0 5px 10px 0 rgba(0, 0, 0, 0.15);
}

.checkpoint .circle {
  display: inline-block;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background-color: #000;
}

.checkpoint:nth-child(1) {
  left: 0;
  top: 0;
  transform: translate(-5%, -40%);
}

.checkpoint:nth-child(2) {
  left: 25%;
  top: 0;
  transform: translate(-25%, -40%);
}

.checkpoint:nth-child(3) {
  left: 50%;
  top: 0;
  transform: translate(-50%, -40%);
}

.checkpoint:nth-child(4) {
  left: 75%;
  top: 0;
  transform: translate(-75%, -40%);
}

.checkpoint:nth-child(5) {
  right: 0;
  top: 0;
  transform: translate(5%, -40%);
}

.fa-stamp {
  color: #000;
}

.btn {
  flex-grow: 1;
  border-radius: 100vmax;
  padding: 0.5em 0;
  font-size: 0.85rem;
  box-shadow: 0 5px 10px 0 rgba(0, 0, 0, 0.15);
  cursor: pointer;
}

.reminder-btn {
  color: #fff;
  background-color: #111827;
  border: 1px solid #1b1b1b;
}

.download-btn {
  border: 1px solid #eee;
  background-color: #fff;
}

/* ----------- */

hr {
  border: none;
  height: 1px;
  background-color: #ddd;
  margin: 0.75em 0;
}

/* payment info */

.payment-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 0.75em 1em;
  font-size: 1rem;
  color: #6b7280;
}

.card-info {
  display: flex;
  align-items: center;
  gap: 0.75em;
}

.card-icon {
  display: inline-block;
  width: 35px;
  height: 26px;
  background-color: #1a43bf;
  border-radius: 5px;
}

.pay-now-btn {
  font-size: 1.15rem;
  background-color: #111827;
  color: #fff;
  width: 100%;
  padding: 0.75em 0;
  border: 2px solid #1b1b1b;
  border-radius: 0.75em;
  box-shadow: 0 0 1px 0 #000, 0 5px 15px 0 rgba(0, 0, 0, 0.45);
  cursor: pointer;
}

@media (max-width: 424px) {
  h1 {
    font-size: 1.2rem;
  }

  .invoice {
    padding: 0.75em;
  }

  .invoice .title {
    position: relative;
    font-size: 1rem;
    padding: 0.5em 0;
  }

  .slot-hole {
    width: 95%;
  }
  .invoice {
    width: 90%;
  }

  .invoice .amount {
    font-size: 0.85rem;
  }

  .payers-list li p {
    font-size: 0.85rem;
  }

  .payers-list .pay-tag {
    font-size: 0.8rem;
  }

  .btn {
    padding: 0.5em 0;
    font-size: 0.8rem;
  }

  .payment-info {
    font-size: 0.95rem;
  }

  .pay-now-btn {
    font-size: 1.05rem;
  }
}
Interactive 3D hover cards where characters pop out of the background frame on hover using CSS perspective.

3D Pop-Out Character Card Hover

This component brings flat character illustrations to life by tilting the card background away while scaling up the foreground portrait on hover. Utilizing a grid layout inside semantic <figure> wrappers, it manipulates CSS 3D perspective, transform-origin, and transition curves to create a parallax pop-out illusion. The fold-out caption panel adds a physical card feel, achieving depth completely without JavaScript.

Technologies:
HTML CSS
Difficulty: Intermediate
Browser Support (as of Jul 2026):
Chrome Chrome 88+ Edge Edge 88+ Firefox Firefox 85+ Safari Safari 15+
Features:
3D Pop-Out Effect Tilt Transitions Pure CSS
Code by: Temani Afif Temani Afif
License: MIT
Interactive SVG toggle button that spawns a robotic hand to switch states, throwing a rock-on sign before sliding out.

Celebratory Robotic Toggle Switch Animation

This playful interactive toggle switch features an animated robotic arm that physically switches states upon click. Built with GSAP and responsive SVGs, the custom timeline orchestrates a multi-phase performance: the arm slides into view, pushes the indicator dot from off to on, morphs its fingers into a celebratory “rock-on” gesture, vibrates, and slides back out of the masked window. (Requires: gsap.js)

Technologies:
SVG HTML CSS JavaScript
Difficulty: Advanced
Browser Support (as of Jul 2026):
Chrome Chrome 55+ Edge Edge 79+ Firefox Firefox 54+ Safari Safari 9.1+
Features:
Robotic Hand Toggle Celebratory Gestures SVG Mask Reveal
Code by: Chris Gannon Chris Gannon
License: MIT
Parallax film presentation page featuring full-screen slider images, rotating side text, and dynamic text scramble transitions upon navigating.

Cinematic Parallax Movie Presentation Slideshow

This media-heavy movie promotion template uses custom GSAP transitions to create an expressive slideshow experience. Built with an object-oriented ES6 structure, the script synchronizes 3D parallax card tilting, vertical captions, and dynamic text-scrambling during slide changes. When a panel is selected, the grid expands, transitioning into a full-bleed details drawer with embedded content. (Requires: gsap.js, imagesloaded.js)

Technologies:
HTML/Pug CSS/Stylus JavaScript
Difficulty: Advanced
Browser Support (as of Jul 2026):
Chrome Chrome 65+ Edge Edge 79+ Firefox Firefox 57+ Safari Safari 11.1+
Features:
Text Scramble FX GSAP 3D Parallax Expanding Detail Panels
Code by: Bailh Bailh
License: MIT
Time slider tracking a curved SVG arc where the thumb shifts colors dynamically along a sunset gradient track.

Color Interpolated SVG Arc Time Slider

This interactive time selector maps a custom sliding thumb along an arced vector path using geometric coordinate tracking. By querying getPointAtLength() in real time, the script translates drag coordinates into a 1440-minute day scale, calculating multi-stop RGB color interpolation for the slider head. Tabular numerals in the tooltip prevent text-jitter, resulting in a smooth, high-fidelity clock widget.

Technologies:
SVG HTML CSS/SCSS JavaScript
Difficulty: Intermediate
Browser Support (as of Jul 2026):
Chrome Chrome 55+ Edge Edge 79+ Firefox Firefox 52+ Safari Safari 11.1+
Features:
SVG Path Tracking RGB Color Interpolation Pointer Event Binding
License: MIT
Digital pixel glitch transition effect applied to an image using pure CSS mask-composite and keyframe position offsets.

CSS Mask Glitch Image Effect

The CSS Mask Glitch Image Effect creates a high-performance glitch animation on an <img> element using pure CSS. By combining custom properties, an optimized set of -webkit-mask-position coordinates, and mask-composite: exclude (or xor), it slices the image into a dynamically shifting grid. The keyframe animation handles the rapid displacement of the mask slices without relying on external libraries or heavy JavaScript.

Technologies:
HTML CSS
Difficulty: Intermediate
Browser Support (as of Jul 2026):
Chrome Chrome 120+ Edge Edge 120+ Firefox Firefox 53+ Safari Safari 15.4+
Features:
Glitch Transition Mask Compositing Pure CSS
Code by: Temani Afif Temani Afif
License: MIT
Grid of images splitting into textured tiles that dynamically flip in 3D using CSS custom properties and math-based delay functions.

Directional 3D Flip Grid Animation

This component dynamically fragments an image container into a grid of 3D-flipping tiles upon click. The JavaScript controller parses directional formulas to assign coordinated stagger delays via CSS custom properties. Each tile performs an alternate rotation using CSS 3D transforms and keyframe animations, offering fourteen distinct wave-like patterns without requiring canvas drawing or external WebGL libraries.

Technologies:
HTML CSS/SCSS JavaScript
Difficulty: Advanced
Browser Support (as of Jul 2026):
Chrome Chrome 49+ Edge Edge 12+ Firefox Firefox 49+ Safari Safari 10+
Features:
3D Stagger Animations Dynamic Image Slicing Mathematical Delay Equations
Code by: ApTyyyP ApTyyyP
License: MIT
Newspaper-style multi-column layout with dynamically generated CSS gradient pull quotes that fade in upon scroll.

Dynamic Animated CSS Pull Quotes

This editorial-style multi-column newspaper template dynamically generates floating quote blocks directly from document-contained <aside> nodes. Powered by an Intersection Observer, the script monitors scroll offsets to apply smooth reveal transitions and trigger custom shimmering gradients using animated background-clip: text values. Double linear gradients frame the quote corners to produce bracket borders cleanly without assets. (Requires: font-awesome)

Technologies:
HTML CSS JavaScript
Difficulty: Intermediate
Browser Support (as of Jul 2026):
Chrome Chrome 51+ Edge Edge 15+ Firefox Firefox 55+ Safari Safari 12.1+
Features:
Dynamic Pull Quotes Viewport Intersection Animated Text Gradients
Code by: Nicole Sentis Nicole Sentis
License: MIT
Retro dog treats landing page featuring grainy noise textures, glassmorphism testimonial cards, and a smooth mouse-tracking gradient aura.

Grainy Gradient Interactive Landing Page

This interface features layered testimonial cards that float dynamically above an organic background. Using semantic span elements structured inside a grid container, the glassmorphism review cards apply a frosted blur to isolate customer feedback. Below, an active gradient glow tracks mouse movement to subtly highlight each blockquote, focusing user attention on positive social proof without cluttering the layout.

Technologies:
HTML CSS/SCSS JavaScript/Babel
Difficulty: Intermediate
Browser Support (as of Jul 2026):
Chrome Chrome 76+ Edge Edge 79+ Firefox Firefox 70+ Safari Safari 13+
Features:
Mouse Tracking Aura Noise Texture Overlay Glassmorphism Cards
Code by: Rory Kasasagi Rory Kasasagi
License: MIT
Interactive scrolling webpage displaying butterfly wings and diagram trees that animate upon scroll using GSAP.

Interactive Cicada Genomics Landing Page

This immersive landing page uses an intricate sequence of vector animations and responsive viewport styling to tell a visual story. Built on top of GSAP ScrollTrigger and MotionPathPlugin, it transitions users through interactive text slides and morphs a tree diagram into organic butterfly wings. Smooth motion path travels, audio ambiance, and SVG stroke-drawing create a highly tailored cinematic web experience. (Requires: gsap.js, observer.js, splittext.js, drawsvgplugin.js, motionpathplugin.js, scrolltrigger.js, customease.js)

Technologies:
HTML CSS/Sass JavaScript
Difficulty: Advanced
Browser Support (as of Jul 2026):
Chrome Chrome 61+ Edge Edge 79+ Firefox Firefox 52+ Safari Safari 11+
Features:
Interactive SVG Tree Flapping Wings Animation Smooth Scroll Animations
License: MIT
Robotic hand emerging from a vector switch to reset a toggle and giving a thumbs up animated with GSAP.

Interactive Robotic Hand Toggle Switch

This playful vector toggle switch triggers an elaborate robotic arm animation to reset itself whenever the user clicks it. Choreographed entirely through GSAP timelines, the arm slides into view, physically pushes the knob back to its starting state, and delivers a quick thumbs-up gesture before retreating. The smooth transition between hand states relies on toggling group opacities and precise transform-origin pivots. (Requires: gsap.js)

Technologies:
SVG HTML CSS JavaScript
Difficulty: Advanced
Browser Support (as of Jul 2026):
Chrome Chrome 49+ Edge Edge 12+ Firefox Firefox 49+ Safari Safari 10+
Features:
Robotic Hand Toggle Interactive SVG Gesture Transitions
Code by: Chris Gannon Chris Gannon
License: MIT
Parallax slide layout featuring expanding variable fonts, split background wipes, and offset floating image layers animated via GSAP.

Interactive Variable Font GSAP Slideshow

This masterfully choreographed full-page slider captures wheel, swipe, and key events to drive a multi-layered transition. Utilizing GSAP Observer, the layout animates parent and child containers in opposite directions, producing a clean split-wipe reveal. Simultaneously, a custom variable font dynamically stretches its width axis (wdth) alongside parallax image transformations to create an organic, tactile sense of momentum. (Requires: gsap, gsap-observer)

Technologies:
HTML CSS/SCSS JavaScript
Difficulty: Advanced
Browser Support (as of Jul 2026):
Chrome Chrome 79+ Edge Edge 79+ Firefox Firefox 68+ Safari Safari 13+
Features:
GSAP Observer Scroll Variable Font Stretching Split Parallax Transitions
Code by: Cassie Evans Cassie Evans
License: MIT
Liquid gooey particle letters dispersing under the mouse pointer and resolving dynamically in WebGL using PIXI.js.

Interactive WebGL Liquid Particle Typography

This interactive backdrop turns text into a dynamic liquid particle cluster over a starry sky. Powered by PIXI.js and WebGL, the engine reads pixel matrices from an offscreen canvas to map a swarm of coordinate-tracking particles. A custom metaball shader merges them with a gooey threshold filter, while pointer-tracking physics disperse the letters elastically on mouse swipe. (Requires: pixi.js)

Technologies:
HTML/Pug CSS/SCSS JavaScript/TypeScript
Difficulty: Advanced
Browser Support (as of Jul 2026):
Chrome Chrome 79+ Edge Edge 79+ Firefox Firefox 79+ Safari Safari 14.1+
Features:
WebGL Liquid Metatext High-Performance Particles Responsive Canvas Math
Code by: Andy Andy
License: MIT
Typography poster utilizing CSS mix-blend-mode lighten overlaid on a blurred HTML Canvas bokeh particle background.

Liquid Glow Blend Mode Poster

This design layout overlays sharp, classic typography onto a fluidly shifting background of colored orbs. Underneath the layout, an HTML5 Canvas draws drifting, colored circles that are diffused into a soft glow by a heavy CSS blur filter. By applying mix-blend-mode: lighten (or overlay), the letters dynamically blend with the shifting light underneath, producing a premium print-like digital editorial.

Technologies:
SVG HTML CSS JavaScript
Difficulty: Intermediate
Browser Support (as of Jul 2026):
Chrome Chrome 49+ Edge Edge 79+ Firefox Firefox 47+ Safari Safari 10+
Features:
Canvas Bokeh Glow CSS Mix Blend Mode Responsive Typography
Code by: Sicontis Sicontis
License: MIT
Alphabetical contact list sidebar indicator with active letters dynamically scaling using CSS scroll-driven animations and view-timeline.

Native CSS Scroll Snap Time Picker

This date and time wheel selector leverages the cutting-edge CSS Scroll Snap Events API to build an efficient mobile-style picker. By registering event listeners for scrollsnapchanging and scrollsnapchange, the layout dynamically updates the select state in real time as the wheels rotate. It uses native CSS scroll-start-target-block to set initial positions, offering a smooth, lightweight solution.

Technologies:
HTML CSS JavaScript/Babel
Difficulty: Advanced
Browser Support (as of Jul 2026):
Chrome Chrome 129+ Edge Edge 129+ Safari Safari 18+
Features:
Scroll Snap Events Scroll Start Target Pure CSS Spinner
Code by: Adam Argyle Adam Argyle
License: MIT
Minimalist vertical timeline on a muted beige backdrop, dynamically revealing articles and years with smooth horizontal slide-ins.

Observer-Animated Responsive Vertical Timeline

This chronological content layout uses an Intersection Observer to fade and slide events smoothly into view as the user scrolls. Utilizing Faker to populate mock data, the ES6 script generates semantic <time> and <small> nodes on load. On larger viewports, the grid transitions to a split layout with left-aligned dates, while a native @media query auto-toggles dark mode. (Requires: faker.js)

Technologies:
HTML CSS JavaScript
Difficulty: Intermediate
Browser Support (as of Jul 2026):
Chrome Chrome 51+ Edge Edge 15+ Firefox Firefox 55+ Safari Safari 12.1+
Features:
Intersection Observer Reveal Responsive Split Layout Prefers Color Scheme Dark
Code by: Jon Kantner Jon Kantner
License: MIT
Alphabetical contact list sidebar indicator with active letters dynamically scaling using CSS scroll-driven animations and view-timeline.

Scroll-Driven CSS Alphabet Indicator Sidebar

The “Scroll-Driven CSS Alphabet Indicator Sidebar” connects a scrollable contact list to a sidebar index using CSS Scroll-Driven Animations. It defines a timeline-scope on the parent and a view-timeline on each alphabetical section. Floating sidebar letters scale dynamically as sections cross the viewport, creating smooth, scroll-linked feedback without high-overhead JS scroll listeners. (Requires: react.js, react-dom.js, faker.js)

Technologies:
HTML CSS JavaScript/Babel
Difficulty: Advanced
Browser Support (as of Jul 2026):
Chrome Chrome 115+ Edge Edge 115+ Safari Safari 26+
Features:
Scroll Animations View Timeline Sticky Headers
Code by: Jhey Jhey
License: MIT
Animated list with draggable items that dynamically swap positions with smooth CSS transform translations upon drag and drop.

Smooth Kinetic Drag and Drop List

This interactive UI panel achieves seamless list reordering by pairing raw pointer event listeners with smooth layout shifts. Rather than manipulating complex external layout engines, the script computes spatial intersections in real time, translating idle cards up or down with hardware-accelerated CSS transitions. Once dropped, the list items natively re-sort themselves within the DOM, preserving page flow.

Technologies:
HTML CSS JavaScript
Difficulty: Intermediate
Browser Support (as of Jul 2026):
Chrome Chrome 51+ Edge Edge 15+ Firefox Firefox 48+ Safari Safari 10+
Features:
Kinetic Reordering Custom Drag Handle Pure JS Physics
License: MIT
Pair of skeuomorphic range sliders with tactile plastic dials and smooth linear-gradient color fill tracks.

Tactile CSS Variable Range Slider

This clean interactive range selector combines standard native inputs with a beautifully modeled plastic interface. The lightweight JavaScript companion reads standard input updates and translates them into a parent-scoped --slider-value CSS custom property. A combination of CSS math calculations and overlay blend-modes handles the fluid thumb positioning and track highlight filling completely inside stylesheets.

Technologies:
HTML CSS/SCSS JavaScript
Difficulty: Beginner
Browser Support (as of Jul 2026):
Chrome Chrome 49+ Edge Edge 15+ Firefox Firefox 49+ Safari Safari 10+
Features:
CSS Variable Binding Skeuomorphic Design Fluid Track Blending
License: MIT
Grid of three textured teal cards featuring shifted 3D overlapping backdrop layers on a base64 speculary-lit SVG noise background.

Textured 3D Layered Grid Cards

This lightweight grid layout styles nested cards with an organic paper feel entirely through vector code. It utilizes a base64-encoded SVG filter featuring specular lighting and turbulence to inject a matte noise texture over solid colors. By applying an offset ::after pseudo-element rotated by 8deg with mix-blend-mode: overlay, each card gains a shifted tactile depth layer without heavy graphics.

Technologies:
SVG HTML/Pug CSS/Sass
Difficulty: Beginner
Browser Support (as of Jul 2026):
Chrome Chrome 105+ Edge Edge 105+ Firefox Firefox 103+ Safari Safari 16+
Features:
SVG Specular Noise Layered Overlay Shifting Conic Gradient BG
License: MIT
Interactive delete button that tilts open an SVG trash can, dynamically vacuums the letter spans inside, and fills the bin using pure CSS keyframes.

Trash Bin Letter Disposal Delete Button

This tactile delete button triggers a playful, paper-shredding trash disposal animation on click. Using vanilla JavaScript to toggle data attributes alongside meticulously timed CSS keyframes, the component skews an SVG garbage bin open while dynamically vacuuming separate text letter spans inside. It leverages a native animationend event listener to reset the visual cycle.

Technologies:
SVG HTML CSS JavaScript
Difficulty: Advanced
Browser Support (as of Jul 2026):
Chrome Chrome 55+ Edge Edge 79+ Firefox Firefox 54+ Safari Safari 9.1+
Features:
SVG Disposal Keyframes Sequential Letter Drops Animation Reset Watcher
Code by: Jon Kantner Jon Kantner
License: MIT
Surreal 3D isometric 404 page animation showing a cube rolling continuously along a track of sliding numbers.

3D Rolling Cube 404 Page Animation

This surreal 404 page template features a continuous, 3D animated scene. Built entirely with HTML and CSS, the layout coordinates multiple keyframe animations to move a dimensional cube along an infinite sliding rail track. As the cube rolls 90 degrees with an elastic bounce, its pseudo-elements dynamically swap text strings between ‘4’ and ‘0’ to match the passing terrain.

Technologies:
HTML/Pug CSS/SCSS
Difficulty: Advanced
Browser Support (as of Jun 2026):
Chrome Chrome 36+ Edge Edge 12+ Firefox Firefox 16+ Safari Safari 9+
Features:
3D Rolling Cube Continuous Rail Slide Dynamic Text Swap
Code by: Ris8 Ris8
License: MIT