Named function expression in JavaScript

Javascript Web Development Object Oriented Programming

Following is the code to implement named function expression in JavaScript.

Example

<!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>Named function expression in JavaScript.</h1>
<div class="result"></div>
<br />
<button class="Btn">CLICK HERE</button>
<h3>Click on the above button to call the fact function expression of obj object</h3>
<script>
   let resEle = document.querySelector(".result");
   let BtnEle = document.querySelector(".Btn");
   let obj = {
      fact: function factorial(n) {
         if (n <= 1) {
            return 1;
         }
         return n * factorial(n - 1);
      },
   };
   BtnEle.addEventListener("click", () => {
      resEle.innerHTML = obj.fact(5);
   });
</script>
</body>
</html>