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
<!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 −