mirror of
https://github.com/reddit-archive/reddit.git
synced 2026-04-27 03:00:12 -04:00
Add es5-sham to reddit-init-legacy.
es5-shim only adds polyfills for es5 methods whose behavior can be faithfully emulated in legacy javascript engines. es5-sham adds stubs and partial support for additional es5 methods (e.g. Object.freeze) with the goal of preventing runtime errors. react-with-addons.js uses some of these methods, and as such breaks on old IE. The 'shams' work perfectly fine for it.
This commit is contained in:
Matt Lee
@@ -399,7 +399,6 @@ catch_errors = "try {{ {content} }} catch (err) {{ r.sendError('Error running mo
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module["reddit-init-base"] = LocalizedModule("reddit-init-base.js",
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"lib/es5-shim.js",
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"lib/modernizr.js",
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"lib/json2.js",
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"lib/underscore-1.4.4.js",
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@@ -432,11 +431,14 @@ module["reddit-init-base"] = LocalizedModule("reddit-init-base.js",
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module["reddit-init-legacy"] = LocalizedModule("reddit-init-legacy.js",
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"lib/html5shiv.js",
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"lib/jquery-1.11.1.js",
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"lib/es5-shim.js",
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"lib/es5-sham.js",
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module["reddit-init-base"],
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)
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module["reddit-init"] = LocalizedModule("reddit-init.js",
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"lib/jquery-2.1.1.js",
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"lib/es5-shim.js",
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module["reddit-init-base"],
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)
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496
r2/r2/public/static/js/lib/es5-sham.js
Normal file
496
r2/r2/public/static/js/lib/es5-sham.js
Normal file
@@ -0,0 +1,496 @@
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/*!
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* https://github.com/es-shims/es5-shim
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* @license es5-shim Copyright 2009-2014 by contributors, MIT License
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* see https://github.com/es-shims/es5-shim/blob/master/LICENSE
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*/
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// vim: ts=4 sts=4 sw=4 expandtab
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//Add semicolon to prevent IIFE from being passed as argument to concated code.
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;
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// UMD (Universal Module Definition)
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// see https://github.com/umdjs/umd/blob/master/returnExports.js
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(function (root, factory) {
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'use strict';
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/*global define, exports, module */
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if (typeof define === 'function' && define.amd) {
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// AMD. Register as an anonymous module.
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define(factory);
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} else if (typeof exports === 'object') {
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// Node. Does not work with strict CommonJS, but
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// only CommonJS-like enviroments that support module.exports,
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// like Node.
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module.exports = factory();
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} else {
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// Browser globals (root is window)
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root.returnExports = factory();
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}
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}(this, function () {
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var call = Function.prototype.call;
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var prototypeOfObject = Object.prototype;
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var owns = call.bind(prototypeOfObject.hasOwnProperty);
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// If JS engine supports accessors creating shortcuts.
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var defineGetter;
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var defineSetter;
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var lookupGetter;
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var lookupSetter;
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var supportsAccessors = owns(prototypeOfObject, '__defineGetter__');
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if (supportsAccessors) {
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/*eslint-disable no-underscore-dangle */
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defineGetter = call.bind(prototypeOfObject.__defineGetter__);
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defineSetter = call.bind(prototypeOfObject.__defineSetter__);
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lookupGetter = call.bind(prototypeOfObject.__lookupGetter__);
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lookupSetter = call.bind(prototypeOfObject.__lookupSetter__);
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/*eslint-enable no-underscore-dangle */
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}
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// ES5 15.2.3.2
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// http://es5.github.com/#x15.2.3.2
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if (!Object.getPrototypeOf) {
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// https://github.com/es-shims/es5-shim/issues#issue/2
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// http://ejohn.org/blog/objectgetprototypeof/
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// recommended by fschaefer on github
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//
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// sure, and webreflection says ^_^
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// ... this will nerever possibly return null
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// ... Opera Mini breaks here with infinite loops
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Object.getPrototypeOf = function getPrototypeOf(object) {
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/*eslint-disable no-proto */
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var proto = object.__proto__;
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/*eslint-enable no-proto */
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if (proto || proto === null) {
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return proto;
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} else if (object.constructor) {
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return object.constructor.prototype;
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} else {
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return prototypeOfObject;
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}
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};
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}
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//ES5 15.2.3.3
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//http://es5.github.com/#x15.2.3.3
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function doesGetOwnPropertyDescriptorWork(object) {
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try {
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object.sentinel = 0;
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return Object.getOwnPropertyDescriptor(object, 'sentinel').value === 0;
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} catch (exception) {
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// returns falsy
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}
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}
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//check whether getOwnPropertyDescriptor works if it's given. Otherwise,
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//shim partially.
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if (Object.defineProperty) {
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var getOwnPropertyDescriptorWorksOnObject = doesGetOwnPropertyDescriptorWork({});
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var getOwnPropertyDescriptorWorksOnDom = typeof document === 'undefined' ||
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doesGetOwnPropertyDescriptorWork(document.createElement('div'));
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if (!getOwnPropertyDescriptorWorksOnDom || !getOwnPropertyDescriptorWorksOnObject) {
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var getOwnPropertyDescriptorFallback = Object.getOwnPropertyDescriptor;
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}
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}
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if (!Object.getOwnPropertyDescriptor || getOwnPropertyDescriptorFallback) {
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var ERR_NON_OBJECT = 'Object.getOwnPropertyDescriptor called on a non-object: ';
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/*eslint-disable no-proto */
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Object.getOwnPropertyDescriptor = function getOwnPropertyDescriptor(object, property) {
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if ((typeof object !== 'object' && typeof object !== 'function') || object === null) {
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throw new TypeError(ERR_NON_OBJECT + object);
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}
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// make a valiant attempt to use the real getOwnPropertyDescriptor
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// for I8's DOM elements.
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if (getOwnPropertyDescriptorFallback) {
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try {
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return getOwnPropertyDescriptorFallback.call(Object, object, property);
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} catch (exception) {
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// try the shim if the real one doesn't work
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}
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}
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var descriptor;
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// If object does not owns property return undefined immediately.
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if (!owns(object, property)) {
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return descriptor;
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}
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// If object has a property then it's for sure both `enumerable` and
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// `configurable`.
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descriptor = { enumerable: true, configurable: true };
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// If JS engine supports accessor properties then property may be a
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// getter or setter.
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if (supportsAccessors) {
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// Unfortunately `__lookupGetter__` will return a getter even
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// if object has own non getter property along with a same named
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// inherited getter. To avoid misbehavior we temporary remove
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// `__proto__` so that `__lookupGetter__` will return getter only
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// if it's owned by an object.
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var prototype = object.__proto__;
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var notPrototypeOfObject = object !== prototypeOfObject;
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// avoid recursion problem, breaking in Opera Mini when
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// Object.getOwnPropertyDescriptor(Object.prototype, 'toString')
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// or any other Object.prototype accessor
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if (notPrototypeOfObject) {
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object.__proto__ = prototypeOfObject;
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}
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var getter = lookupGetter(object, property);
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var setter = lookupSetter(object, property);
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if (notPrototypeOfObject) {
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// Once we have getter and setter we can put values back.
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object.__proto__ = prototype;
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}
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if (getter || setter) {
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if (getter) {
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descriptor.get = getter;
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}
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if (setter) {
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descriptor.set = setter;
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}
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// If it was accessor property we're done and return here
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// in order to avoid adding `value` to the descriptor.
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return descriptor;
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}
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}
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// If we got this far we know that object has an own property that is
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// not an accessor so we set it as a value and return descriptor.
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descriptor.value = object[property];
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descriptor.writable = true;
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return descriptor;
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};
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/*eslint-enable no-proto */
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}
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// ES5 15.2.3.4
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// http://es5.github.com/#x15.2.3.4
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if (!Object.getOwnPropertyNames) {
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Object.getOwnPropertyNames = function getOwnPropertyNames(object) {
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return Object.keys(object);
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};
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}
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// ES5 15.2.3.5
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// http://es5.github.com/#x15.2.3.5
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if (!Object.create) {
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// Contributed by Brandon Benvie, October, 2012
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var createEmpty;
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var supportsProto = !({ __proto__: null } instanceof Object);
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// the following produces false positives
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// in Opera Mini => not a reliable check
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// Object.prototype.__proto__ === null
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/*global document */
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if (supportsProto || typeof document === 'undefined') {
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createEmpty = function () {
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return { __proto__: null };
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};
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} else {
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// In old IE __proto__ can't be used to manually set `null`, nor does
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// any other method exist to make an object that inherits from nothing,
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// aside from Object.prototype itself. Instead, create a new global
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// object and *steal* its Object.prototype and strip it bare. This is
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// used as the prototype to create nullary objects.
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createEmpty = function () {
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var iframe = document.createElement('iframe');
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var parent = document.body || document.documentElement;
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iframe.style.display = 'none';
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parent.appendChild(iframe);
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/*eslint-disable no-script-url */
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iframe.src = 'javascript:';
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/*eslint-enable no-script-url */
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var empty = iframe.contentWindow.Object.prototype;
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parent.removeChild(iframe);
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iframe = null;
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delete empty.constructor;
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delete empty.hasOwnProperty;
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delete empty.propertyIsEnumerable;
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delete empty.isPrototypeOf;
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delete empty.toLocaleString;
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delete empty.toString;
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delete empty.valueOf;
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/*eslint-disable no-proto */
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empty.__proto__ = null;
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/*eslint-enable no-proto */
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function Empty() {}
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Empty.prototype = empty;
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// short-circuit future calls
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createEmpty = function () {
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return new Empty();
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};
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return new Empty();
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};
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}
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Object.create = function create(prototype, properties) {
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var object;
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function Type() {} // An empty constructor.
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if (prototype === null) {
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object = createEmpty();
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} else {
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if (typeof prototype !== 'object' && typeof prototype !== 'function') {
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// In the native implementation `parent` can be `null`
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// OR *any* `instanceof Object` (Object|Function|Array|RegExp|etc)
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// Use `typeof` tho, b/c in old IE, DOM elements are not `instanceof Object`
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// like they are in modern browsers. Using `Object.create` on DOM elements
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// is...err...probably inappropriate, but the native version allows for it.
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throw new TypeError('Object prototype may only be an Object or null'); // same msg as Chrome
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}
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Type.prototype = prototype;
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object = new Type();
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// IE has no built-in implementation of `Object.getPrototypeOf`
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// neither `__proto__`, but this manually setting `__proto__` will
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// guarantee that `Object.getPrototypeOf` will work as expected with
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// objects created using `Object.create`
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/*eslint-disable no-proto */
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object.__proto__ = prototype;
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/*eslint-enable no-proto */
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}
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if (properties !== void 0) {
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Object.defineProperties(object, properties);
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}
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return object;
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};
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}
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// ES5 15.2.3.6
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// http://es5.github.com/#x15.2.3.6
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// Patch for WebKit and IE8 standard mode
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// Designed by hax <hax.github.com>
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// related issue: https://github.com/es-shims/es5-shim/issues#issue/5
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// IE8 Reference:
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// http://msdn.microsoft.com/en-us/library/dd282900.aspx
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// http://msdn.microsoft.com/en-us/library/dd229916.aspx
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// WebKit Bugs:
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// https://bugs.webkit.org/show_bug.cgi?id=36423
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function doesDefinePropertyWork(object) {
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try {
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Object.defineProperty(object, 'sentinel', {});
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return 'sentinel' in object;
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} catch (exception) {
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// returns falsy
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}
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}
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// check whether defineProperty works if it's given. Otherwise,
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// shim partially.
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if (Object.defineProperty) {
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var definePropertyWorksOnObject = doesDefinePropertyWork({});
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var definePropertyWorksOnDom = typeof document === 'undefined' ||
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doesDefinePropertyWork(document.createElement('div'));
|
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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 ((typeof object !== 'object' && typeof object !== 'function') || object === null) {
|
||||
throw new TypeError(ERR_NON_OBJECT_TARGET + object);
|
||||
}
|
||||
if ((typeof descriptor !== 'object' && typeof descriptor !== 'function') || descriptor === null) {
|
||||
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 {
|
||||
if (!supportsAccessors) {
|
||||
throw new TypeError(ERR_ACCESSORS_NOT_SUPPORTED);
|
||||
}
|
||||
// If we got that far then getters and setters can be defined !!
|
||||
if ('get' in descriptor) {
|
||||
defineGetter(object, property, descriptor.get);
|
||||
}
|
||||
if ('set' in descriptor) {
|
||||
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
|
||||
}
|
||||
}
|
||||
|
||||
for (var property in properties) {
|
||||
if (owns(properties, property) && 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 freeze(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;
|
||||
};
|
||||
}
|
||||
|
||||
}));
|
||||
Reference in New Issue
Block a user