aaac7fed
 liuqimichale
add
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// Workaround for http://code.google.com/p/v8/issues/detail?id=2804
"use strict";
var create = Object.create, shim;
if (!require("./set-prototype-of/is-implemented")()) {
shim = require("./set-prototype-of/shim");
}
module.exports = (function () {
var nullObject, polyProps, desc;
if (!shim) return create;
if (shim.level !== 1) return create;
nullObject = {};
polyProps = {};
desc = {
configurable: false,
enumerable: false,
writable: true,
value: undefined
};
Object.getOwnPropertyNames(Object.prototype).forEach(function (name) {
if (name === "__proto__") {
polyProps[name] = {
configurable: true,
enumerable: false,
writable: true,
value: undefined
};
return;
}
polyProps[name] = desc;
});
Object.defineProperties(nullObject, polyProps);
Object.defineProperty(shim, "nullPolyfill", {
configurable: false,
enumerable: false,
writable: false,
value: nullObject
});
return function (prototype, props) {
return create(prototype === null ? nullObject : prototype, props);
};
}());
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