How to assign static methods to a class in JavaScript?


To assign static methods to class in JavaScript simply prefix the method with keyword static. The static methods then can be called without instantiating the class.

Following is the code to assign static methods to a class in JavaScript −

Example

 Live Demo

<!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>

Output

The above code will produce the following output −

On clicking the ‘CLICK HERE’ button −

Updated on: 21-Jul-2020

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