JavaScript 中的访问器属性及其属性

javascriptweb developmentobject oriented programming更新于 2025/9/3 4:28:17

访问器属性帮助我们在 JavaScript 中实现 getter 和 setter 函数。它们在获取或设置值时执行函数。

访问器属性有四个属性 −

get − 读取属性时调用。它不接受任何参数/
set − 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">点击此处</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>