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Concise arrow functions in JavaScript
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 −
Updated on: 17-Jul-2020
253 Views
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