JavaScript 中的访问器属性及自定义属性。
访问器属性帮助我们在 JavaScript 中实现 getter 和 setter 函数。在获取或设置值时会执行函数。
访问器属性有四个属性−
- get − 在读取属性时调用。它不接受任何参数。
- set − 在设置属性时调用。它只接受一个参数。
- enumerable − 设置为 true 时允许对象可迭代。
- configurable − 设置为 false 时,不允许删除属性或更改其值。
以下是访问器属性及其属性的代码 -
示例
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0" /> <title>Document</title> <style> body { font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; } .result { font-size: 20px; font-weight: 500; color: blueviolet; } </style> </head> <body> <h1>Accessor property and its attributes</h1> <div class="result"></div> <br /> <button class="Btn">CLICK HERE</button> <h3>Click on the above button to use set and get to modify and display person object properties</h3> <script> let resEle = document.querySelector(".result"); let BtnEle = document.querySelector(".Btn"); let person = { name: "Rohan", age: 22, occupation: "Student", get fullname() { return this.name; }, set job(occupation) { this.occupation = occupation; }, }; BtnEle.addEventListener("click", () => { resEle.innerHTML = "Name = " + person.fullname + " : Occupation = " + person.occupation; resEle.innerHTML += "<br>After modifying occupation property <br>"; person.occupation = "Developer"; resEle.innerHTML += "New Occupation = " + person.occupation; }); </script> </body> </html>
输出
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