如何在 JavaScript 中給類分配靜態方法？

要在 JavaScript 中給類分配靜態方法，只需在方法前加上關鍵字 static。然後無需例項化類就可以呼叫靜態方法。

下面是 JavaScript 中給類分配靜態方法的程式碼：

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: 18px;
      font-weight: 500;
      color: rebeccapurple;
   }
</style>
</head>
<body>
<h1>Assign static methods to a class in JavaScript</h1>
<div class="result"></div>
<button class="Btn">CLICK HERE</button>
<h3>Click on the above button to add two numbers using static method of testClass</h3>
<script>
   let resEle = document.querySelector(".result");
   let BtnEle = document.querySelector(".Btn");
   class testClass {
      constructor(fname, lname) {
         this.fname = fname;
         this.lname = lname;
      }
      static add(a, b) {
         resEle.innerHTML = a + " + " + b + " = " + (a + b);
      }
   }
   BtnEle.addEventListener("click", () => {
      testClass.add(22, 44);
   });
</script>
</body>
</html>