Object ParallelArray Promise Proxy RangeError[我来译!] ReferenceError Reflect RegExp SIMD SIMD.Bool16x8[我来译!] SIMD.Bool32x4[我来译!] SIMD.Bool64x2[我来译!] SIMD.Bool8x16[我来译!] SIMD.Float32x4[我来译!] SIMD.Float64x2[我来译!] ...
};varcar2 =Object.create(Car2.prototype, {//value propertiescolor: {writable:true,configurable:true,value:'red'},//concrete desc valuerawDesc: {writable:false,configurable:true,value:'Porsche boxter'},// data properties (assigned using getters and setters)desc: {configurable:true,get:function(...
1 // 解决IE9及其以下 不支持classList属性的问题 2 if (!...("classList" in document.documentElement)) { 3 Object.defineProperty(HTMLElement.prototype..., 'classList', { 4 get: function() { 5 var self = this; 93141 第88天:HTML5中使用classList操作css类 ...
Class, Factory, and Object Prototypes in JavaScript (opens new window) 创建对象的工厂模式和构造函数模式 (opens new window)# 任务请你使用 ES6 class 运用面向对象的方法编写一个 在浏览器可以玩的 Tic-Tac-Toe 游戏游戏介绍Tic-Tac-Toe 是一种在 3 x 3 网格上进行的两人游戏。一个标记“X”,另一个...
- If the deserialized JSON object was missing any required properties. mdnText public String mdnText() Get the mdnText property: The MDN text. Returns: the mdnText value.micHashingAlgorithm public HashingAlgorithm micHashingAlgorithm() Get the micHashingAlgorithm property: The signing or hashing al...
What happens behind the scenes?primeaccepts a single argument as a config object. The object is a simple JavaScript Object - with special keys (also referred tomutator keys). Amutator keyis a key:value pair that has a special meaning and is used differently by the Class constructor. The fo...
And while we can test for membership, it’s not simple:function isMember(theEnum, value) { return Object.values(theEnum).includes(value); } assert.equal(isMember(Color, Color.blue), true); assert.equal(isMember(Color, 'blue'), false); ...
the AgreementContent object itself. withX12 public AgreementContent withX12(X12AgreementContent x12) Set the x12 property: The X12 agreement content. Parameters: x12 - the x12 value to set. Returns: the AgreementContent object itself. x12 public X12AgreementContent x12() Get the x12 property: ...
It's important to note that this only applies to classes that extend EmberObject! For classes that do not, you should define your own constructor and use new: class Person { constructor(firstName, lastName) { this.firstName = firstName; this.lastName = lastName; } } let person = new...
与Object.create比起来,Object.setPrototypeOf具有严重的性能问题,因此在如果你很在乎这个,使用前应好好考虑。 对性能问题的说明 使用Object.setPrototypeOf来改变一个对象的原型是一个昂贵的操作,MDN是这样解释的: 由于现代 JavaScript 引擎优化属性访问所带来的特性的关系,更改对象的 [[Prototype]]在各个浏览器和 Ja...