Function redefineProperty

history.js:576–704

* This method is implemented to override the built-in(native) * properties in the browser, unfortunately some browsers are * not allowed to override all the properties and even add. * For this reason, this was written by a method that tries to * do everything necessary to get the desired

(object, prop, descriptor, onWrapped)

   * @return {Object|Boolean} Returns an object on success, otherwise returns false
   */
  function redefineProperty(object, prop, descriptor, onWrapped) {
    var testOnly = 0;
    // test only if descriptor is undefined
    if (!descriptor) {
      descriptor = {set: emptyFunction};
      testOnly = 1;
    }
    // variable will have a value of true the success of attempts to set descriptors
    var isDefinedSetter = !descriptor.set;
    var isDefinedGetter = !descriptor.get;
    // for tests of attempts to set descriptors
    var test = {configurable: true, set: function() {
      isDefinedSetter = 1;
    }, get: function() {
      isDefinedGetter = 1;
    }};

    try {
      // testing for the possibility of overriding/adding properties
      defineProperty(object, prop, test);
      // running the test
      object[prop] = object[prop];
      // attempt to override property using the standard method
      defineProperty(object, prop, descriptor);
    } catch(_e_) {
    }

    // If the variable 'isDefined' has a false value, it means that need to try other methods
    if (!isDefinedSetter || !isDefinedGetter) {
      // try to override/add the property, using deprecated functions
      if (object.__defineGetter__) {
        // testing for the possibility of overriding/adding properties
        object.__defineGetter__(prop, test.get);
        object.__defineSetter__(prop, test.set);
        // running the test
        object[prop] = object[prop];
        // attempt to override property using the deprecated functions
        descriptor.get && object.__defineGetter__(prop, descriptor.get);
        descriptor.set && object.__defineSetter__(prop, descriptor.set);
      }

      // Browser refused to override the property, using the standard and deprecated methods
      if (!isDefinedSetter || !isDefinedGetter) {
        if (testOnly) {
          return false;
        } else if (object === global) {
          // try override global properties
          try {
            // save original value from this property
            var originalValue = object[prop];
            // set null to built-in(native) property
            object[prop] = null;
          } catch(_e_) {
          }
          // This rule for Internet Explorer 8
          if ('execScript' in global) {
            /**
             * to IE8 override the global properties using