|
@@ -0,0 +1,560 @@
|
|
|
+/*!
|
|
|
+ * https://github.com/es-shims/es5-shim
|
|
|
+ * @license es5-shim Copyright 2009-2015 by contributors, MIT License
|
|
|
+ * see https://github.com/es-shims/es5-shim/blob/master/LICENSE
|
|
|
+ */
|
|
|
+
|
|
|
+// vim: ts=4 sts=4 sw=4 expandtab
|
|
|
+
|
|
|
+// Add semicolon to prevent IIFE from being passed as argument to concatenated code.
|
|
|
+;
|
|
|
+
|
|
|
+// UMD (Universal Module Definition)
|
|
|
+// see https://github.com/umdjs/umd/blob/master/templates/returnExports.js
|
|
|
+(function (root, factory) {
|
|
|
+ 'use strict';
|
|
|
+
|
|
|
+ /* global define, exports, module */
|
|
|
+ if (typeof define === 'function' && define.amd) {
|
|
|
+ // AMD. Register as an anonymous module.
|
|
|
+ define(factory);
|
|
|
+ } else if (typeof exports === 'object') {
|
|
|
+ // Node. Does not work with strict CommonJS, but
|
|
|
+ // only CommonJS-like enviroments that support module.exports,
|
|
|
+ // like Node.
|
|
|
+ module.exports = factory();
|
|
|
+ } else {
|
|
|
+ // Browser globals (root is window)
|
|
|
+ root.returnExports = factory();
|
|
|
+ }
|
|
|
+}(this, function () {
|
|
|
+
|
|
|
+ var call = Function.call;
|
|
|
+ var prototypeOfObject = Object.prototype;
|
|
|
+ var owns = call.bind(prototypeOfObject.hasOwnProperty);
|
|
|
+ var isEnumerable = call.bind(prototypeOfObject.propertyIsEnumerable);
|
|
|
+ var toStr = call.bind(prototypeOfObject.toString);
|
|
|
+
|
|
|
+ // If JS engine supports accessors creating shortcuts.
|
|
|
+ var defineGetter;
|
|
|
+ var defineSetter;
|
|
|
+ var lookupGetter;
|
|
|
+ var lookupSetter;
|
|
|
+ var supportsAccessors = owns(prototypeOfObject, '__defineGetter__');
|
|
|
+ if (supportsAccessors) {
|
|
|
+ /* eslint-disable no-underscore-dangle, no-restricted-properties */
|
|
|
+ defineGetter = call.bind(prototypeOfObject.__defineGetter__);
|
|
|
+ defineSetter = call.bind(prototypeOfObject.__defineSetter__);
|
|
|
+ lookupGetter = call.bind(prototypeOfObject.__lookupGetter__);
|
|
|
+ lookupSetter = call.bind(prototypeOfObject.__lookupSetter__);
|
|
|
+ /* eslint-enable no-underscore-dangle, no-restricted-properties */
|
|
|
+ }
|
|
|
+
|
|
|
+ var isPrimitive = function isPrimitive(o) {
|
|
|
+ return o == null || (typeof o !== 'object' && typeof o !== 'function');
|
|
|
+ };
|
|
|
+
|
|
|
+ // ES5 15.2.3.2
|
|
|
+ // http://es5.github.com/#x15.2.3.2
|
|
|
+ if (!Object.getPrototypeOf) {
|
|
|
+ // https://github.com/es-shims/es5-shim/issues#issue/2
|
|
|
+ // http://ejohn.org/blog/objectgetprototypeof/
|
|
|
+ // recommended by fschaefer on github
|
|
|
+ //
|
|
|
+ // sure, and webreflection says ^_^
|
|
|
+ // ... this will nerever possibly return null
|
|
|
+ // ... Opera Mini breaks here with infinite loops
|
|
|
+ Object.getPrototypeOf = function getPrototypeOf(object) {
|
|
|
+ // eslint-disable-next-line no-proto
|
|
|
+ var proto = object.__proto__;
|
|
|
+ if (proto || proto === null) {
|
|
|
+ return proto;
|
|
|
+ } else if (toStr(object.constructor) === '[object Function]') {
|
|
|
+ return object.constructor.prototype;
|
|
|
+ } else if (object instanceof Object) {
|
|
|
+ return prototypeOfObject;
|
|
|
+ } else {
|
|
|
+ // Correctly return null for Objects created with `Object.create(null)`
|
|
|
+ // (shammed or native) or `{ __proto__: null}`. Also returns null for
|
|
|
+ // cross-realm objects on browsers that lack `__proto__` support (like
|
|
|
+ // IE <11), but that's the best we can do.
|
|
|
+ return null;
|
|
|
+ }
|
|
|
+ };
|
|
|
+ }
|
|
|
+
|
|
|
+ // ES5 15.2.3.3
|
|
|
+ // http://es5.github.com/#x15.2.3.3
|
|
|
+
|
|
|
+ var doesGetOwnPropertyDescriptorWork = function doesGetOwnPropertyDescriptorWork(object) {
|
|
|
+ try {
|
|
|
+ object.sentinel = 0;
|
|
|
+ return Object.getOwnPropertyDescriptor(object, 'sentinel').value === 0;
|
|
|
+ } catch (exception) {
|
|
|
+ return false;
|
|
|
+ }
|
|
|
+ };
|
|
|
+
|
|
|
+ // check whether getOwnPropertyDescriptor works if it's given. Otherwise, shim partially.
|
|
|
+ if (Object.defineProperty) {
|
|
|
+ var getOwnPropertyDescriptorWorksOnObject = doesGetOwnPropertyDescriptorWork({});
|
|
|
+ var getOwnPropertyDescriptorWorksOnDom = typeof document === 'undefined'
|
|
|
+ || doesGetOwnPropertyDescriptorWork(document.createElement('div'));
|
|
|
+ if (!getOwnPropertyDescriptorWorksOnDom || !getOwnPropertyDescriptorWorksOnObject) {
|
|
|
+ var getOwnPropertyDescriptorFallback = Object.getOwnPropertyDescriptor;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ if (!Object.getOwnPropertyDescriptor || getOwnPropertyDescriptorFallback) {
|
|
|
+ var ERR_NON_OBJECT = 'Object.getOwnPropertyDescriptor called on a non-object: ';
|
|
|
+
|
|
|
+ /* eslint-disable no-proto */
|
|
|
+ Object.getOwnPropertyDescriptor = function getOwnPropertyDescriptor(object, property) {
|
|
|
+ if (isPrimitive(object)) {
|
|
|
+ throw new TypeError(ERR_NON_OBJECT + object);
|
|
|
+ }
|
|
|
+
|
|
|
+ // make a valiant attempt to use the real getOwnPropertyDescriptor
|
|
|
+ // for I8's DOM elements.
|
|
|
+ if (getOwnPropertyDescriptorFallback) {
|
|
|
+ try {
|
|
|
+ return getOwnPropertyDescriptorFallback.call(Object, object, property);
|
|
|
+ } catch (exception) {
|
|
|
+ // try the shim if the real one doesn't work
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ var descriptor;
|
|
|
+
|
|
|
+ // If object does not owns property return undefined immediately.
|
|
|
+ if (!owns(object, property)) {
|
|
|
+ return descriptor;
|
|
|
+ }
|
|
|
+
|
|
|
+ // If object has a property then it's for sure `configurable`, and
|
|
|
+ // probably `enumerable`. Detect enumerability though.
|
|
|
+ descriptor = {
|
|
|
+ enumerable: isEnumerable(object, property),
|
|
|
+ configurable: true
|
|
|
+ };
|
|
|
+
|
|
|
+ // If JS engine supports accessor properties then property may be a
|
|
|
+ // getter or setter.
|
|
|
+ if (supportsAccessors) {
|
|
|
+ // Unfortunately `__lookupGetter__` will return a getter even
|
|
|
+ // if object has own non getter property along with a same named
|
|
|
+ // inherited getter. To avoid misbehavior we temporary remove
|
|
|
+ // `__proto__` so that `__lookupGetter__` will return getter only
|
|
|
+ // if it's owned by an object.
|
|
|
+ var prototype = object.__proto__;
|
|
|
+ var notPrototypeOfObject = object !== prototypeOfObject;
|
|
|
+ // avoid recursion problem, breaking in Opera Mini when
|
|
|
+ // Object.getOwnPropertyDescriptor(Object.prototype, 'toString')
|
|
|
+ // or any other Object.prototype accessor
|
|
|
+ if (notPrototypeOfObject) {
|
|
|
+ object.__proto__ = prototypeOfObject;
|
|
|
+ }
|
|
|
+
|
|
|
+ var getter = lookupGetter(object, property);
|
|
|
+ var setter = lookupSetter(object, property);
|
|
|
+
|
|
|
+ if (notPrototypeOfObject) {
|
|
|
+ // Once we have getter and setter we can put values back.
|
|
|
+ object.__proto__ = prototype;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (getter || setter) {
|
|
|
+ if (getter) {
|
|
|
+ descriptor.get = getter;
|
|
|
+ }
|
|
|
+ if (setter) {
|
|
|
+ descriptor.set = setter;
|
|
|
+ }
|
|
|
+ // If it was accessor property we're done and return here
|
|
|
+ // in order to avoid adding `value` to the descriptor.
|
|
|
+ return descriptor;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ // If we got this far we know that object has an own property that is
|
|
|
+ // not an accessor so we set it as a value and return descriptor.
|
|
|
+ descriptor.value = object[property];
|
|
|
+ descriptor.writable = true;
|
|
|
+ return descriptor;
|
|
|
+ };
|
|
|
+ /* eslint-enable no-proto */
|
|
|
+ }
|
|
|
+
|
|
|
+ // ES5 15.2.3.4
|
|
|
+ // http://es5.github.com/#x15.2.3.4
|
|
|
+ if (!Object.getOwnPropertyNames) {
|
|
|
+ Object.getOwnPropertyNames = function getOwnPropertyNames(object) {
|
|
|
+ return Object.keys(object);
|
|
|
+ };
|
|
|
+ }
|
|
|
+
|
|
|
+ // ES5 15.2.3.5
|
|
|
+ // http://es5.github.com/#x15.2.3.5
|
|
|
+ if (!Object.create) {
|
|
|
+
|
|
|
+ // Contributed by Brandon Benvie, October, 2012
|
|
|
+ var createEmpty;
|
|
|
+ var supportsProto = !({ __proto__: null } instanceof Object);
|
|
|
+ // the following produces false positives
|
|
|
+ // in Opera Mini => not a reliable check
|
|
|
+ // Object.prototype.__proto__ === null
|
|
|
+
|
|
|
+ // Check for document.domain and active x support
|
|
|
+ // No need to use active x approach when document.domain is not set
|
|
|
+ // see https://github.com/es-shims/es5-shim/issues/150
|
|
|
+ // variation of https://github.com/kitcambridge/es5-shim/commit/4f738ac066346
|
|
|
+ /* global ActiveXObject */
|
|
|
+ var shouldUseActiveX = function shouldUseActiveX() {
|
|
|
+ // return early if document.domain not set
|
|
|
+ if (!document.domain) {
|
|
|
+ return false;
|
|
|
+ }
|
|
|
+
|
|
|
+ try {
|
|
|
+ return !!new ActiveXObject('htmlfile');
|
|
|
+ } catch (exception) {
|
|
|
+ return false;
|
|
|
+ }
|
|
|
+ };
|
|
|
+
|
|
|
+ // This supports IE8 when document.domain is used
|
|
|
+ // see https://github.com/es-shims/es5-shim/issues/150
|
|
|
+ // variation of https://github.com/kitcambridge/es5-shim/commit/4f738ac066346
|
|
|
+ var getEmptyViaActiveX = function getEmptyViaActiveX() {
|
|
|
+ var empty;
|
|
|
+ var xDoc;
|
|
|
+
|
|
|
+ xDoc = new ActiveXObject('htmlfile');
|
|
|
+
|
|
|
+ var script = 'script';
|
|
|
+ xDoc.write('<' + script + '></' + script + '>');
|
|
|
+ xDoc.close();
|
|
|
+
|
|
|
+ empty = xDoc.parentWindow.Object.prototype;
|
|
|
+ xDoc = null;
|
|
|
+
|
|
|
+ return empty;
|
|
|
+ };
|
|
|
+
|
|
|
+ // The original implementation using an iframe
|
|
|
+ // before the activex approach was added
|
|
|
+ // see https://github.com/es-shims/es5-shim/issues/150
|
|
|
+ var getEmptyViaIFrame = function getEmptyViaIFrame() {
|
|
|
+ var iframe = document.createElement('iframe');
|
|
|
+ var parent = document.body || document.documentElement;
|
|
|
+ var empty;
|
|
|
+
|
|
|
+ iframe.style.display = 'none';
|
|
|
+ parent.appendChild(iframe);
|
|
|
+ // eslint-disable-next-line no-script-url
|
|
|
+ iframe.src = 'javascript:';
|
|
|
+
|
|
|
+ empty = iframe.contentWindow.Object.prototype;
|
|
|
+ parent.removeChild(iframe);
|
|
|
+ iframe = null;
|
|
|
+
|
|
|
+ return empty;
|
|
|
+ };
|
|
|
+
|
|
|
+ /* global document */
|
|
|
+ if (supportsProto || typeof document === 'undefined') {
|
|
|
+ createEmpty = function () {
|
|
|
+ return { __proto__: null };
|
|
|
+ };
|
|
|
+ } else {
|
|
|
+ // In old IE __proto__ can't be used to manually set `null`, nor does
|
|
|
+ // any other method exist to make an object that inherits from nothing,
|
|
|
+ // aside from Object.prototype itself. Instead, create a new global
|
|
|
+ // object and *steal* its Object.prototype and strip it bare. This is
|
|
|
+ // used as the prototype to create nullary objects.
|
|
|
+ createEmpty = function () {
|
|
|
+ // Determine which approach to use
|
|
|
+ // see https://github.com/es-shims/es5-shim/issues/150
|
|
|
+ var empty = shouldUseActiveX() ? getEmptyViaActiveX() : getEmptyViaIFrame();
|
|
|
+
|
|
|
+ delete empty.constructor;
|
|
|
+ delete empty.hasOwnProperty;
|
|
|
+ delete empty.propertyIsEnumerable;
|
|
|
+ delete empty.isPrototypeOf;
|
|
|
+ delete empty.toLocaleString;
|
|
|
+ delete empty.toString;
|
|
|
+ delete empty.valueOf;
|
|
|
+
|
|
|
+ var Empty = function Empty() {};
|
|
|
+ Empty.prototype = empty;
|
|
|
+ // short-circuit future calls
|
|
|
+ createEmpty = function () {
|
|
|
+ return new Empty();
|
|
|
+ };
|
|
|
+ return new Empty();
|
|
|
+ };
|
|
|
+ }
|
|
|
+
|
|
|
+ Object.create = function create(prototype, properties) {
|
|
|
+
|
|
|
+ var object;
|
|
|
+ var Type = function Type() {}; // An empty constructor.
|
|
|
+
|
|
|
+ if (prototype === null) {
|
|
|
+ object = createEmpty();
|
|
|
+ } else {
|
|
|
+ if (prototype !== null && isPrimitive(prototype)) {
|
|
|
+ // In the native implementation `parent` can be `null`
|
|
|
+ // OR *any* `instanceof Object` (Object|Function|Array|RegExp|etc)
|
|
|
+ // Use `typeof` tho, b/c in old IE, DOM elements are not `instanceof Object`
|
|
|
+ // like they are in modern browsers. Using `Object.create` on DOM elements
|
|
|
+ // is...err...probably inappropriate, but the native version allows for it.
|
|
|
+ throw new TypeError('Object prototype may only be an Object or null'); // same msg as Chrome
|
|
|
+ }
|
|
|
+ Type.prototype = prototype;
|
|
|
+ object = new Type();
|
|
|
+ // IE has no built-in implementation of `Object.getPrototypeOf`
|
|
|
+ // neither `__proto__`, but this manually setting `__proto__` will
|
|
|
+ // guarantee that `Object.getPrototypeOf` will work as expected with
|
|
|
+ // objects created using `Object.create`
|
|
|
+ // eslint-disable-next-line no-proto
|
|
|
+ object.__proto__ = prototype;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (properties !== void 0) {
|
|
|
+ Object.defineProperties(object, properties);
|
|
|
+ }
|
|
|
+
|
|
|
+ return object;
|
|
|
+ };
|
|
|
+ }
|
|
|
+
|
|
|
+ // ES5 15.2.3.6
|
|
|
+ // http://es5.github.com/#x15.2.3.6
|
|
|
+
|
|
|
+ // Patch for WebKit and IE8 standard mode
|
|
|
+ // Designed by hax <hax.github.com>
|
|
|
+ // related issue: https://github.com/es-shims/es5-shim/issues#issue/5
|
|
|
+ // IE8 Reference:
|
|
|
+ // http://msdn.microsoft.com/en-us/library/dd282900.aspx
|
|
|
+ // http://msdn.microsoft.com/en-us/library/dd229916.aspx
|
|
|
+ // WebKit Bugs:
|
|
|
+ // https://bugs.webkit.org/show_bug.cgi?id=36423
|
|
|
+
|
|
|
+ var doesDefinePropertyWork = function doesDefinePropertyWork(object) {
|
|
|
+ try {
|
|
|
+ Object.defineProperty(object, 'sentinel', {});
|
|
|
+ return 'sentinel' in object;
|
|
|
+ } catch (exception) {
|
|
|
+ return false;
|
|
|
+ }
|
|
|
+ };
|
|
|
+
|
|
|
+ // check whether defineProperty works if it's given. Otherwise,
|
|
|
+ // shim partially.
|
|
|
+ if (Object.defineProperty) {
|
|
|
+ var definePropertyWorksOnObject = doesDefinePropertyWork({});
|
|
|
+ var definePropertyWorksOnDom = typeof document === 'undefined'
|
|
|
+ || doesDefinePropertyWork(document.createElement('div'));
|
|
|
+ if (!definePropertyWorksOnObject || !definePropertyWorksOnDom) {
|
|
|
+ var definePropertyFallback = Object.defineProperty,
|
|
|
+ definePropertiesFallback = Object.defineProperties;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ if (!Object.defineProperty || definePropertyFallback) {
|
|
|
+ var ERR_NON_OBJECT_DESCRIPTOR = 'Property description must be an object: ';
|
|
|
+ var ERR_NON_OBJECT_TARGET = 'Object.defineProperty called on non-object: ';
|
|
|
+ var ERR_ACCESSORS_NOT_SUPPORTED = 'getters & setters can not be defined on this javascript engine';
|
|
|
+
|
|
|
+ Object.defineProperty = function defineProperty(object, property, descriptor) {
|
|
|
+ if (isPrimitive(object)) {
|
|
|
+ throw new TypeError(ERR_NON_OBJECT_TARGET + object);
|
|
|
+ }
|
|
|
+ if (isPrimitive(descriptor)) {
|
|
|
+ throw new TypeError(ERR_NON_OBJECT_DESCRIPTOR + descriptor);
|
|
|
+ }
|
|
|
+ // make a valiant attempt to use the real defineProperty
|
|
|
+ // for I8's DOM elements.
|
|
|
+ if (definePropertyFallback) {
|
|
|
+ try {
|
|
|
+ return definePropertyFallback.call(Object, object, property, descriptor);
|
|
|
+ } catch (exception) {
|
|
|
+ // try the shim if the real one doesn't work
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ // If it's a data property.
|
|
|
+ if ('value' in descriptor) {
|
|
|
+ // fail silently if 'writable', 'enumerable', or 'configurable'
|
|
|
+ // are requested but not supported
|
|
|
+ /*
|
|
|
+ // alternate approach:
|
|
|
+ if ( // can't implement these features; allow false but not true
|
|
|
+ ('writable' in descriptor && !descriptor.writable) ||
|
|
|
+ ('enumerable' in descriptor && !descriptor.enumerable) ||
|
|
|
+ ('configurable' in descriptor && !descriptor.configurable)
|
|
|
+ ))
|
|
|
+ throw new RangeError(
|
|
|
+ 'This implementation of Object.defineProperty does not support configurable, enumerable, or writable.'
|
|
|
+ );
|
|
|
+ */
|
|
|
+
|
|
|
+ if (supportsAccessors && (lookupGetter(object, property) || lookupSetter(object, property))) {
|
|
|
+ // As accessors are supported only on engines implementing
|
|
|
+ // `__proto__` we can safely override `__proto__` while defining
|
|
|
+ // a property to make sure that we don't hit an inherited
|
|
|
+ // accessor.
|
|
|
+ /* eslint-disable no-proto */
|
|
|
+ var prototype = object.__proto__;
|
|
|
+ object.__proto__ = prototypeOfObject;
|
|
|
+ // Deleting a property anyway since getter / setter may be
|
|
|
+ // defined on object itself.
|
|
|
+ delete object[property];
|
|
|
+ object[property] = descriptor.value;
|
|
|
+ // Setting original `__proto__` back now.
|
|
|
+ object.__proto__ = prototype;
|
|
|
+ /* eslint-enable no-proto */
|
|
|
+ } else {
|
|
|
+ object[property] = descriptor.value;
|
|
|
+ }
|
|
|
+ } else {
|
|
|
+ var hasGetter = 'get' in descriptor;
|
|
|
+ var hasSetter = 'set' in descriptor;
|
|
|
+ if (!supportsAccessors && (hasGetter || hasSetter)) {
|
|
|
+ throw new TypeError(ERR_ACCESSORS_NOT_SUPPORTED);
|
|
|
+ }
|
|
|
+ // If we got that far then getters and setters can be defined !!
|
|
|
+ if (hasGetter) {
|
|
|
+ defineGetter(object, property, descriptor.get);
|
|
|
+ }
|
|
|
+ if (hasSetter) {
|
|
|
+ defineSetter(object, property, descriptor.set);
|
|
|
+ }
|
|
|
+ }
|
|
|
+ return object;
|
|
|
+ };
|
|
|
+ }
|
|
|
+
|
|
|
+ // ES5 15.2.3.7
|
|
|
+ // http://es5.github.com/#x15.2.3.7
|
|
|
+ if (!Object.defineProperties || definePropertiesFallback) {
|
|
|
+ Object.defineProperties = function defineProperties(object, properties) {
|
|
|
+ // make a valiant attempt to use the real defineProperties
|
|
|
+ if (definePropertiesFallback) {
|
|
|
+ try {
|
|
|
+ return definePropertiesFallback.call(Object, object, properties);
|
|
|
+ } catch (exception) {
|
|
|
+ // try the shim if the real one doesn't work
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ Object.keys(properties).forEach(function (property) {
|
|
|
+ if (property !== '__proto__') {
|
|
|
+ Object.defineProperty(object, property, properties[property]);
|
|
|
+ }
|
|
|
+ });
|
|
|
+ return object;
|
|
|
+ };
|
|
|
+ }
|
|
|
+
|
|
|
+ // ES5 15.2.3.8
|
|
|
+ // http://es5.github.com/#x15.2.3.8
|
|
|
+ if (!Object.seal) {
|
|
|
+ Object.seal = function seal(object) {
|
|
|
+ if (Object(object) !== object) {
|
|
|
+ throw new TypeError('Object.seal can only be called on Objects.');
|
|
|
+ }
|
|
|
+ // this is misleading and breaks feature-detection, but
|
|
|
+ // allows "securable" code to "gracefully" degrade to working
|
|
|
+ // but insecure code.
|
|
|
+ return object;
|
|
|
+ };
|
|
|
+ }
|
|
|
+
|
|
|
+ // ES5 15.2.3.9
|
|
|
+ // http://es5.github.com/#x15.2.3.9
|
|
|
+ if (!Object.freeze) {
|
|
|
+ Object.freeze = function freeze(object) {
|
|
|
+ if (Object(object) !== object) {
|
|
|
+ throw new TypeError('Object.freeze can only be called on Objects.');
|
|
|
+ }
|
|
|
+ // this is misleading and breaks feature-detection, but
|
|
|
+ // allows "securable" code to "gracefully" degrade to working
|
|
|
+ // but insecure code.
|
|
|
+ return object;
|
|
|
+ };
|
|
|
+ }
|
|
|
+
|
|
|
+ // detect a Rhino bug and patch it
|
|
|
+ try {
|
|
|
+ Object.freeze(function () {});
|
|
|
+ } catch (exception) {
|
|
|
+ Object.freeze = (function (freezeObject) {
|
|
|
+ return function freeze(object) {
|
|
|
+ if (typeof object === 'function') {
|
|
|
+ return object;
|
|
|
+ } else {
|
|
|
+ return freezeObject(object);
|
|
|
+ }
|
|
|
+ };
|
|
|
+ }(Object.freeze));
|
|
|
+ }
|
|
|
+
|
|
|
+ // ES5 15.2.3.10
|
|
|
+ // http://es5.github.com/#x15.2.3.10
|
|
|
+ if (!Object.preventExtensions) {
|
|
|
+ Object.preventExtensions = function preventExtensions(object) {
|
|
|
+ if (Object(object) !== object) {
|
|
|
+ throw new TypeError('Object.preventExtensions can only be called on Objects.');
|
|
|
+ }
|
|
|
+ // this is misleading and breaks feature-detection, but
|
|
|
+ // allows "securable" code to "gracefully" degrade to working
|
|
|
+ // but insecure code.
|
|
|
+ return object;
|
|
|
+ };
|
|
|
+ }
|
|
|
+
|
|
|
+ // ES5 15.2.3.11
|
|
|
+ // http://es5.github.com/#x15.2.3.11
|
|
|
+ if (!Object.isSealed) {
|
|
|
+ Object.isSealed = function isSealed(object) {
|
|
|
+ if (Object(object) !== object) {
|
|
|
+ throw new TypeError('Object.isSealed can only be called on Objects.');
|
|
|
+ }
|
|
|
+ return false;
|
|
|
+ };
|
|
|
+ }
|
|
|
+
|
|
|
+ // ES5 15.2.3.12
|
|
|
+ // http://es5.github.com/#x15.2.3.12
|
|
|
+ if (!Object.isFrozen) {
|
|
|
+ Object.isFrozen = function isFrozen(object) {
|
|
|
+ if (Object(object) !== object) {
|
|
|
+ throw new TypeError('Object.isFrozen can only be called on Objects.');
|
|
|
+ }
|
|
|
+ return false;
|
|
|
+ };
|
|
|
+ }
|
|
|
+
|
|
|
+ // ES5 15.2.3.13
|
|
|
+ // http://es5.github.com/#x15.2.3.13
|
|
|
+ if (!Object.isExtensible) {
|
|
|
+ Object.isExtensible = function isExtensible(object) {
|
|
|
+ // 1. If Type(O) is not Object throw a TypeError exception.
|
|
|
+ if (Object(object) !== object) {
|
|
|
+ throw new TypeError('Object.isExtensible can only be called on Objects.');
|
|
|
+ }
|
|
|
+ // 2. Return the Boolean value of the [[Extensible]] internal property of O.
|
|
|
+ var name = '';
|
|
|
+ while (owns(object, name)) {
|
|
|
+ name += '?';
|
|
|
+ }
|
|
|
+ object[name] = true;
|
|
|
+ var returnValue = owns(object, name);
|
|
|
+ delete object[name];
|
|
|
+ return returnValue;
|
|
|
+ };
|
|
|
+ }
|
|
|
+
|
|
|
+}));
|