2 JavaScript Snow Effects
This collection demonstrates how to create JavaScript snow effects using <canvas> - the most performant way to render a large number of particles. At the heart of each example is a requestAnimationFrame loop that smoothly updates the position of each snowflake on the canvas. JavaScript handles everything here: from generating particles with random parameters (size, speed, opacity) to redrawing them on every frame. This approach allows for creating dense and realistic snowfall that doesn’t overload the DOM and runs smoothly.
Examples

SVG Snowfall Overlay with JavaScript
An atmospheric snowfall effect generated dynamically via JavaScript, utilizing SMIL animateMotion along complex SVG Bezier paths to create organic, drifting flake movement over a full-screen background.
See the Pen SVG Snowfall Overlay with JavaScript.

Random SVG Snowflake Generator
A snowflake generator in pure JS that creates unique SVG shapes on the fly. The geometry of each arm is determined by random parameters in a <path>, and symmetry is achieved through efficient cloning using the <use> tag.
See the Pen Random SVG Snowflake Generator.