Package Exports

component-raf

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (component-raf) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

raf

request animation frame

Installation

$ component install component/raf

Example

Request the animation frame with raf(fn), cancel with raf.cancel(id).

var x = 0;
var y = 50;
var canvas = document.querySelector('canvas');
var ctx = canvas.getContext('2d');
var raf = require('raf');

function animate() {
  raf(animate);
  draw();
}

var prev = Date.now();
function draw() {
  var curr = Date.now();
  var diff = curr - prev;
  var p = diff / 16;
  ctx.clearRect(0, 0, 900, 300);
  ctx.beginPath();
  ctx.globalAlpha = .5;
  ctx.arc(x, y, 10, 0, Math.PI * 2, false);
  ctx.fill();
  x += 2;
  y += Math.sin(x/20) * 5;
  prev = curr;
}

animate();

License

MIT