64 lines
2.2 KiB
JavaScript
64 lines
2.2 KiB
JavaScript
|
;
|
||
|
|
/**
|
||
|
|
* @fileoverview Polyfills for old browsers.
|
||
|
|
* @see https://github.com/inexorabletash/polyfill/blob/master/es5.js
|
||
|
|
* @see https://gist.github.com/jhermsmeier/9a34b06a107bbf5d2c91
|
||
|
|
*/
|
||
|
|
|
||
|
|
// ES 15.2.3.6 Object.defineProperty ( O, P, Attributes )
|
||
|
|
// Partial support for most common case - getters, setters, and values
|
||
|
|
(function() {
|
||
|
|
if (!Object.defineProperty ||
|
||
|
|
!(function () { try { Object.defineProperty({}, 'x', {}); return true; } catch (e) { return false; } } ())) {
|
||
|
|
var orig = Object.defineProperty;
|
||
|
|
Object.defineProperty = function (o, prop, desc) {
|
||
|
|
// In IE8 try built-in implementation for defining properties on DOM prototypes.
|
||
|
|
if (orig) { try { return orig(o, prop, desc); } catch (e) {} }
|
||
|
|
|
||
|
|
if (o !== Object(o)) { throw TypeError("Object.defineProperty called on non-object"); }
|
||
|
|
if (Object.prototype.__defineGetter__ && ('get' in desc)) {
|
||
|
|
Object.prototype.__defineGetter__.call(o, prop, desc.get);
|
||
|
|
}
|
||
|
|
if (Object.prototype.__defineSetter__ && ('set' in desc)) {
|
||
|
|
Object.prototype.__defineSetter__.call(o, prop, desc.set);
|
||
|
|
}
|
||
|
|
if ('value' in desc) {
|
||
|
|
o[prop] = desc.value;
|
||
|
|
}
|
||
|
|
return o;
|
||
|
|
};
|
||
|
|
}
|
||
|
|
}());
|
||
|
|
|
||
|
|
// On older versions of IE Object.getOwnPropertyDescriptor can only be
|
||
|
|
// called with DOM elements; Here it is tested against a non-DOM object.
|
||
|
|
// If an error is raised, the method is replaced.
|
||
|
|
// https://gist.github.com/jhermsmeier/9a34b06a107bbf5d2c91
|
||
|
|
try {
|
||
|
|
Object.getOwnPropertyDescriptor({"t":"o"}, "t");
|
||
|
|
} catch(err) {
|
||
|
|
Object.getOwnPropertyDescriptor = function( object, key ) {
|
||
|
|
|
||
|
|
var hasSupport =
|
||
|
|
typeof object.__lookupGetter__ === 'function' &&
|
||
|
|
typeof object.__lookupSetter__ === 'function'
|
||
|
|
|
||
|
|
// TODO: How does one determine this?!
|
||
|
|
var isGetterSetter = !hasSupport ? null :
|
||
|
|
object.__lookupGetter__( key ) ||
|
||
|
|
object.__lookupSetter__( key )
|
||
|
|
|
||
|
|
return isGetterSetter != null ? {
|
||
|
|
configurable: true,
|
||
|
|
enumerable: true,
|
||
|
|
get: object.__lookupGetter__( key ),
|
||
|
|
set: object.__lookupSetter__( key )
|
||
|
|
} : {
|
||
|
|
configurable: true,
|
||
|
|
writable: true,
|
||
|
|
enumerable: true,
|
||
|
|
value: object[ key ]
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|