prefixed.js

define(['ModernizrProto', 'testPropsAll'], function( ModernizrProto, testPropsAll ) {
  // Modernizr.prefixed() returns the prefixed or nonprefixed property name variant of your input
  // Modernizr.prefixed('boxSizing') // 'MozBoxSizing'

  // Properties must be passed as dom-style camelcase, rather than `box-sizing` hypentated style.
  // Return values will also be the camelCase variant, if you need to translate that to hypenated style use:
  //
  //     str.replace(/([A-Z])/g, function(str,m1){ return '-' + m1.toLowerCase(); }).replace(/^ms-/,'-ms-');

  // If you're trying to ascertain which transition end event to bind to, you might do something like...
  //
  //     var transEndEventNames = {
  //       'WebkitTransition' : 'webkitTransitionEnd',
  //       'MozTransition'    : 'transitionend',
  //       'OTransition'      : 'oTransitionEnd',
  //       'msTransition'     : 'MSTransitionEnd',
  //       'transition'       : 'transitionend'
  //     },
  //     transEndEventName = transEndEventNames[ Modernizr.prefixed('transition') ];

  var prefixed = ModernizrProto.prefixed = function( prop, obj, elem ) {
    if (!obj) {
      return testPropsAll(prop, 'pfx');
    } else {
      // Testing DOM property e.g. Modernizr.prefixed('requestAnimationFrame', window) // 'mozRequestAnimationFrame'
      return testPropsAll(prop, obj, elem);
    }
  };

  return prefixed;
});