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Filename :
es5.js
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var isES5 = (function(){ "use strict"; return this === undefined; })(); if (isES5) { module.exports = { freeze: Object.freeze, defineProperty: Object.defineProperty, getDescriptor: Object.getOwnPropertyDescriptor, keys: Object.keys, names: Object.getOwnPropertyNames, getPrototypeOf: Object.getPrototypeOf, isArray: Array.isArray, isES5: isES5, propertyIsWritable: function(obj, prop) { var descriptor = Object.getOwnPropertyDescriptor(obj, prop); return !!(!descriptor || descriptor.writable || descriptor.set); } }; } else { var has = {}.hasOwnProperty; var str = {}.toString; var proto = {}.constructor.prototype; var ObjectKeys = function (o) { var ret = []; for (var key in o) { if (has.call(o, key)) { ret.push(key); } } return ret; }; var ObjectGetDescriptor = function(o, key) { return {value: o[key]}; }; var ObjectDefineProperty = function (o, key, desc) { o[key] = desc.value; return o; }; var ObjectFreeze = function (obj) { return obj; }; var ObjectGetPrototypeOf = function (obj) { try { return Object(obj).constructor.prototype; } catch (e) { return proto; } }; var ArrayIsArray = function (obj) { try { return str.call(obj) === "[object Array]"; } catch(e) { return false; } }; module.exports = { isArray: ArrayIsArray, keys: ObjectKeys, names: ObjectKeys, defineProperty: ObjectDefineProperty, getDescriptor: ObjectGetDescriptor, freeze: ObjectFreeze, getPrototypeOf: ObjectGetPrototypeOf, isES5: isES5, propertyIsWritable: function() { return true; } }; }