[JavaScript] asyncLoadCSS

asyncLoadCSS.js

function asyncLoadCSS (css_href) {
  var css_link = function () {
      var h = document.getElementsByTagName('head')[0]
      var l = document.createElement('link')
      l.rel = 'stylesheet'
      l.href = css_href
      h.parentNode.insertBefore(l, h)
    }, RAF = requestAnimationFrame || mozRequestAnimationFrame
      || webkitRequestAnimationFrame || msRequestAnimationFrame
  if (RAF) RAF(css_link); else window.addEventListener('load', css_link)
}