Concise arrow functions in JavaScript

JavascriptWeb DevelopmentObject Oriented Programming

The conscise arrow function syntax is as follows −

(param1, param2) =>param1+param2

It doesn’t have the function keyword and the function body. There is only => between the parameters and function body and if there is single parameter than it can also be written like this −

param1=>param1*2

It has implicit return if there aren’t curly braces {} after the =>.

Following is the code to implement concise arrow functions 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: 20px;
      font-weight: 500;
      color: blueviolet;
   }
</style>
</head>
<body>
<h1>Concise arrow functions</h1>
<div class="result"></div>
<button class="Btn">CLICK HERE</button>
<h3>Click on the above button to call the add() concise arrow function</h3>
<script>
   let resEle = document.querySelector(".result");
   let add = (a, b) => a + b;
   document.querySelector(".Btn").addEventListener("click", () => {
      resEle.innerHTML = "Sum of 32 and 19 =" + add(32, 19);
   });
</script>
</body>
</html>

Output

On clicking the ‘CLICK HERE’ button −


raja
Updated on 17-Jul-2020 11:39:29

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