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. TheObject.getOwnPropertyNames()metho...
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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 + ...
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...
getOwnPropertyDescriptor(target, propKey):拦截 Object.getOwnPropertyDescriptor(proxy, propKey),返回属性的描述对象。 defineProperty(target, propKey, propDesc):拦截 Object.defineProperty(proxy, propKey, propDesc)、Object.defineProperties(proxy, propDescs),返回一个布尔值。
Example 1: JavaScript Object.getOwnPropertyDescriptors() let obj = { x: 10, get number() { return this.x; }, }; // get the property descriptors for all the properties of obj let value = Object.getOwnPropertyDescriptors(obj); console.log(value); Run Code Output { x: { value: ...
for (let key of Reflect.ownKeys(obj)) { result[key] = Object.getOwnPropertyDescriptor(obj, key); } return result; } 1. 2. 3. 4. 5. 6. 7. 该方法的提出目的,主要是为了解决Object.assign()无法正确拷贝get属性和set属性的问题。
<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){ ...
function(e){return t.flat.call(e)}:function(e){return t.concat.apply([],e)},u=t.push,i=t.indexOf,n={},o=n.toString,v=n.hasOwnProperty,a=v.toString,l=a.call(Object),y={},m=function(e){return"function"==typeof e&&"number"!=typeof e.nodeType},x=function(e){return null...
代码语言:javascript 代码运行次数:0 运行 AI代码解释 <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.1.7</version> <relativePath/> <!-- lookup parent from update --> </parent> <properties> <project.build.sourceEncoding>UTF-...