html-canvas-animation

A TypeScript (compiles to JavaScript) library for running animations in HTML Canvas. The library can be consumed as a local NPM package (installable through npm or yarn).

Usage

Build with yarn build:prod (production) or yarn build (development).

Using as a library

1. Move ./index.d.ts and build/release/* to <path>/vendor/html-canvas-animation.

2. In package.json add

{
  "dependencies": {
    "html-canvas-animation": "./vendor/html-canvas-animation/"
  }
}

3. Run yarn install

4. Import and use.

Example

import { Rectangle, CanvasLoop, easing } from "html-canvas-animation";

const testAnimation = (ctx: CanvasRenderingContext2D) => {
  const animation = Rectangle.animate(ctx)
    .scale({ duration: 2000, size: { width: 50, height: 50 } })
    .translate({ duration: 2000, to: { x: 125, y: 80 } });

  animation.onFinish = () => animation.fadeOut(1000, easing.easeOutQuad);
  animation.setRectangle(new Rectangle("#9575CD", 50, 50, 25, 25));

  return animation;
};

window.onload = function () {
  const canvas = document.createElement("canvas");
  document.body.appendChild(canvas);

  const canvasLoop = CanvasLoop.create(canvas);

  if (canvasLoop === null) {
    console.warn("Could not create canvas loop.");
    return;
  }

  canvasLoop.onFinish = () => {
    canvasLoop.clear();
    console.log("onFinish");
  };

  const animation = testAnimation(canvasLoop.ctx);
  canvasLoop.addEntity(animation);

  canvasLoop.start();
};