Fat arrow functions in JavaScript

The fat arrow function syntax looks like the following −

(param1,param2,..)=>{ }

It doesn’t have the function keyword and only have the => between the parameters and the function body.

Following is the code implementing fat arrow functions in JavaScript −


 Live Demo

<!DOCTYPE html>
<html lang="en">
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
   body {
      font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
      font-size: 20px;
      font-weight: 500;
      color: blueviolet;
<h1>Fat arrow functions</h1>
<div class="result"></div>
<button class="Btn">CLICK HERE</button>
<h3>Click on the above button to call the add() fat arrow function</h3>
   let resEle = document.querySelector(".result");
   let add = (a, b) => {
      return a + b;
   document.querySelector(".Btn").addEventListener("click", () => {
      resEle.innerHTML = "Sum of 32 and 19 =" + add(32, 19);


On clicking the ‘CLICK HERE’ button −

Updated on: 17-Jul-2020


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