114 lines
3.7 KiB
JavaScript
114 lines
3.7 KiB
JavaScript
|
/*!
|
||
|
|
* https://github.com/paulmillr/es6-shim
|
||
|
|
* @license es6-shim Copyright 2013-2014 by Paul Miller (http://paulmillr.com)
|
||
|
|
* and contributors, MIT License
|
||
|
|
* es6-sham: v0.20.1
|
||
|
|
* see https://github.com/paulmillr/es6-shim/blob/master/LICENSE
|
||
|
|
* Details and documentation:
|
||
|
|
* https://github.com/paulmillr/es6-shim/
|
||
|
|
*/
|
||
|
|
|
||
|
|
(function (undefined) {
|
||
|
|
'use strict';
|
||
|
|
|
||
|
|
/*jshint evil: true */
|
||
|
|
var getGlobal = new Function('return this;');
|
||
|
|
/*jshint evil: false */
|
||
|
|
|
||
|
|
var main = function () {
|
||
|
|
var globals = getGlobal();
|
||
|
|
var Object = globals.Object;
|
||
|
|
|
||
|
|
// NOTE: This versions needs object ownership
|
||
|
|
// beacuse every promoted object needs to be reassigned
|
||
|
|
// otherwise uncompatible browsers cannot work as expected
|
||
|
|
//
|
||
|
|
// NOTE: This might need es5-shim or polyfills upfront
|
||
|
|
// because it's based on ES5 API.
|
||
|
|
// (probably just an IE <= 8 problem)
|
||
|
|
//
|
||
|
|
// NOTE: nodejs is fine in version 0.8, 0.10, and future versions.
|
||
|
|
(function () {
|
||
|
|
if (Object.setPrototypeOf) { return; }
|
||
|
|
|
||
|
|
/*jshint proto: true */
|
||
|
|
// @author Andrea Giammarchi - @WebReflection
|
||
|
|
// define into target descriptors from source
|
||
|
|
var copyDescriptors = function (target, source) {
|
||
|
|
getOwnPropertyNames(source).forEach(function (key) {
|
||
|
|
defineProperty(
|
||
|
|
target,
|
||
|
|
key,
|
||
|
|
getOwnPropertyDescriptor(source, key)
|
||
|
|
);
|
||
|
|
});
|
||
|
|
return target;
|
||
|
|
};
|
||
|
|
// used as fallback when no promotion is possible
|
||
|
|
var createAndCopy = function (origin, proto) {
|
||
|
|
return copyDescriptors(create(proto), origin);
|
||
|
|
};
|
||
|
|
var create = Object.create;
|
||
|
|
var defineProperty = Object.defineProperty;
|
||
|
|
var getPrototypeOf = Object.getPrototypeOf;
|
||
|
|
var getOwnPropertyNames = Object.getOwnPropertyNames;
|
||
|
|
var getOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;
|
||
|
|
var proto = Object.prototype;
|
||
|
|
var set, setPrototypeOf;
|
||
|
|
|
||
|
|
try {
|
||
|
|
// this might fail for various reasons
|
||
|
|
// ignore if Chrome cought it at runtime
|
||
|
|
set = getOwnPropertyDescriptor(proto, '__proto__').set;
|
||
|
|
set.call({}, null);
|
||
|
|
// setter not poisoned, it can promote
|
||
|
|
// Firefox, Chrome
|
||
|
|
setPrototypeOf = function (origin, proto) {
|
||
|
|
set.call(origin, proto);
|
||
|
|
return origin;
|
||
|
|
};
|
||
|
|
} catch (e) {
|
||
|
|
// do one or more feature detections
|
||
|
|
set = {__proto__: null};
|
||
|
|
// if proto does not work, needs to fallback
|
||
|
|
// some Opera, Rhino, ducktape
|
||
|
|
if (set instanceof Object) {
|
||
|
|
setPrototypeOf = createAndCopy;
|
||
|
|
} else {
|
||
|
|
// verify if null objects are buggy
|
||
|
|
set.__proto__ = proto;
|
||
|
|
// if null objects are buggy
|
||
|
|
// nodejs 0.8 to 0.10
|
||
|
|
if (set instanceof Object) {
|
||
|
|
setPrototypeOf = function (origin, proto) {
|
||
|
|
// use such bug to promote
|
||
|
|
origin.__proto__ = proto;
|
||
|
|
return origin;
|
||
|
|
};
|
||
|
|
} else {
|
||
|
|
// try to use proto or fallback
|
||
|
|
// Safari, old Firefox, many others
|
||
|
|
setPrototypeOf = function (origin, proto) {
|
||
|
|
// if proto is not null
|
||
|
|
return getPrototypeOf(origin) ?
|
||
|
|
// use __proto__ to promote
|
||
|
|
((origin.__proto__ = proto), origin) :
|
||
|
|
// otherwise unable to promote: fallback
|
||
|
|
createAndCopy(origin, proto);
|
||
|
|
};
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
Object.setPrototypeOf = setPrototypeOf;
|
||
|
|
}());
|
||
|
|
|
||
|
|
};
|
||
|
|
|
||
|
|
if (typeof define === 'function' && define.amd) {
|
||
|
|
define(main); // RequireJS
|
||
|
|
} else {
|
||
|
|
main(); // CommonJS and <script>
|
||
|
|
}
|
||
|
|
}());
|
||
|
|
|