掌握JavaScript 原生 002:对象 Object-静态方法 2 Object.create 江山3D编程 302 0 掌握JavaScript 原生 006:对象 Object-静态方法 冻结、密封、防扩展三者对比 江山3D编程 169 0 掌握JavaScript 原生 005:对象 Object-静态方法 ⑤ Object.defineProperties 江山3D编程 224 0 今天给大家推荐 7 款在国内完全免费...
看这里更清晰https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Object/defineProperty 0 回复 收藏 分享 添加回复 普莱那 来自北京 2022-06-26 test.name=会触发set,然后set内部再次调用this.name=又会触发set,然后就爆栈了 ...
Let’s have a javascript object letuser={id:11,name:"frank",salary:5000,active:true,roles: ["admin","hr"],}; #Simple to create a partial set of attributes Let’s create a new object initializing existing partial properties as seen below. varuserinfo={id:user.id,name:user.name};consol...
让我们用getOwnPropertyDescriptors方法克隆对象。 constcrocodilian=Object.defineProperties({},Object.getOwnPropertyDescriptors(gator))); 现在,让我们比较一下我们拥有的每个对象的描述符: console.log(Object.getOwnPropertyDescriptors(gator)); /* name: {value:'Ben', writable: true, enumerable: true, configu...
5 <title>JavaScript Get Properties Values of an Object</title> 6 </head> 7 <body> 8 <script> 9 let book = { 10 "name": "Harry Potter and the Goblet of Fire", 11 "author": "J. K. Rowling", 12 "year": 2000 13 }; 14 15 // Dot notation 16 document.write(book.name + ...
<scripttype="text/javascript"> //定义多个属性 //Object.defineProperties var book = {} Object.defineProperties(book , { _year: { value: 2004 }, edition: { value: 1 }, year: { get: function(){ return this._year; }, set: function(newValue){ ...
To get all own properties of an object in JavaScript, you can use theObject.getOwnPropertyNames()method. This method returns an array containing all the names of the enumerable and non-enumerableown propertiesfound directly on the object passed in as an argument. ...
Object.getOwnPropertyDescriptors方法返回一个对象,所有原对象的属性名都是该对象的属性名,对应的属性值就是该属性的描述对象。 该方法的实现非常容易。 function getOwnPropertyDescriptors(obj) { const result = {}; for (let key of Reflect.ownKeys(obj)) { ...
value:"软件学院",enumerable:true,//enumerable定义了对象的属性是否可以在 for...in 循环和 Object.keys() 中被枚举。writable:false//当writable属性设置为false时,该属性被称为“不可写”。它不能被重新分配。}); },_defineProperties(obj) {Object.defineProperties(obj, {department: {configurable:true,/...
The getOwnPropertyDescriptors() method returns an object containing all the property descriptors of the given object. Example 1: JavaScript Object.getOwnPropertyDescriptors() let obj = { x: 10, get number() { return this.x; }, }; // get the property descriptors for all the properties of...