Use DOMContentLoaded event instead. Supported by IE9+.

document.addEventListener( 'DOMContentLoaded', function( event ) {
  console.log("DOM is ready. Let's party");
});

Cross browser document ready helper. Supported by IE8+ and good browsers.

docReady( function() {
  console.log("DOM is ready. Let's party");
});

Props to dperini/ContentLoaded for original code

Install with Bower bower install doc-ready

Install with npm npm install doc-ready

docReady is released under the MIT license.