classPerson{constructor(name,age){// 私有属性let_name=name;this.age=age;this.setName=function(name){_name=name;};this.getName=function(){return_name;};}greet(){console.log(`hi, i'm${this.getName()}and i'm${this.age}years old`);}} Class中的实现也会存在和构造函数中一样的问题,...
vara1 = document.getElementById("div1").getAttribute("title1");vara2 = document.getElementById("div1").getAttribute("class");vara3 = document.getElementById("div1").getAttribute("id");vara4 = document.getElementById("div1").getAttribute("title"); console.log(a1) console.log(a2) cons...
AI代码解释 // 四边形functionRectangle(length,width){this.length=length;this.width=width;};// 获取面积Rectangle.prototype.getArea=function(){returnthis.length*this.width;};// 获取尺寸信息Rectangle.prototype.getSize=function(){console.log(`Rectangle:${this.length}x${this.width},面积:${this.getAr...
1)window.getComputedStyle()与element.currentStyle 一个元素的计算样式(computed style)都是应用在该元素上的所有样式组合。 这些样式包括样式表、元素的style特性,以及脚本对style属性的各种操作。 现代浏览器(包括IE9)的实现方法为:window.getComputedStyle(),返回接口提供了一个getPropertyValue()的方法。 IE9之前...
primary" data-toggle="modal" data-target="#exampleModal" data-whatever="@fat">Open modal for @fat Open modal for @getbootstrap ...more buttons...
it would be important that they both get the same object, even ifpriorThinggets assigned over and over so that both functions share the same lexical environment. But as soon as a variable is used by any closure, it ends up in the lexical environment shared by all closures in that scope....
defineProperty(person, "_name", { get: function(){ return this.name }, // 定义Set时,则设置一个属性的值时会导致其他属性发生变化 set: function(newValue){ this.name = newValue; this.year = 12; } }) // 定义多个属性 Object。defineProperties(book, { _year: { writable: false, value: ...
如果你不需要跟踪对象中的所有字段,可以使用 Object.defineProperty 或一组 Object.defineProperties 来选择特定的一个或几个。 复制 const person = { _originalName: 'Pavel', // 私有属性 } Object.defineProperty(person, 'name', { get() { console.log('获取属性 name') ...
classCustomDateTimeextendsDayjsUtilsimplementsIUtils<Dayjs> { getWeekdays =()=>{conststart =this.dayjs().startOf("week");return[0,1].map((diff) =>this.formatByString(start.add(diff,"day"),"dd")); }; } Note: that you will need to do this with every adapter you want to support ...
An exception is thrown if a descriptor has both value or writable and get or set keys. Example 1: JavaScript Object.defineProperties() let obj1 = {}; // define two properties for obj1 Object.defineProperties(obj1, { 'name': { value: 'Clint', writable: true }, 'age': { value:...