Function makePrefixMap

docs/external/js/react-dom.development.js:2717–2723

* Generate a mapping of standard vendor prefixes using the defined style property and event name. * * @param {string} styleProp * @param {string} eventName * @returns {object}

(styleProp, eventName)

   */

  function makePrefixMap(styleProp, eventName) {
    var prefixes = {};
    prefixes[styleProp.toLowerCase()] = eventName.toLowerCase();
    prefixes['Webkit' + styleProp] = 'webkit' + eventName;
    prefixes['Moz' + styleProp] = 'moz' + eventName;
    return prefixes;
  }
  /**
   * A list of event names to a configurable list of vendor prefixes.
   */