requestAnimationFrame shim in 155 bytes (127 gzipped)

README.md

requestAnimationFrame shim

Cross-browser requestAnimationFrame in 155 bytes of JavaScript.

requestanimationframe.js

/*
 * requestAnimationFrame shim
 * a = window object
 * b = string to re-use
 */
!function (a, b) {
  // test for all vendor prefixes
  // concatenating the string stored in b
  // a['r' + b] = window.requestAnimationFrame
  a['r' + b] = a['r' + b] 
    || a['webkitR' + b] // webkit
    || a['mozR' + b] // mozilla
    || a['oR' + b] // opera
    || a['msR' + b] // internet explorer
    // use a setTimeout fallback for unsupported browsers
    // c = callback function
    || function (c) {
    a.setTimeout(c, 1E3 / 60)
  }
}(window, 'equestAnimationFrame');

requestanimationframe.min.js

!function(a,b){a["r"+b]=a["r"+b]||a["webkitR"+b]||a["mozR"+b]||a["oR"+b]||a["msR"+b]||function(c){a.setTimeout(c,1E3/60)}}(window,"equestAnimationFrame");