在 JavaScript 中分享方法

可以通过将方法附加到对象的 prototype 属性来共享方法。这些方法将在对象的全部实例中共享。

以下是 JavaScript 中共享方法的代码 −

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>Shared methods in JavaScript</h1>
<div class="result"></div>
<button class="Btn">CLICK HERE</button>
<h3>Click on the above button to the call the displayInfo method of student1 and student2 object</h3>
<script>
   let resEle = document.querySelector(".result");
   function Student(name, age, standard) {
      this.name = name;
      this.age = age;
      this.standard = standard;
   }
   Student.prototype.displayInfo = function () {
      return `${this.name} age ${this.age} : standard :${this.standard} <br>`;
   };
   let student1 = new Student("Rohan", 17, 12);
   let student2 = new Student("Shawn", 16, 11);
   document.querySelector(".Btn").addEventListener("click", () => {
      resEle.innerHTML = student1.displayInfo();
      resEle.innerHTML += student2.displayInfo();
   });
</script>
</body>
</html>