Posted By
Bajarangi soft ,
Posted On 10-10-2020
Syntax
Without Arrow function
hello = function() {
return "Hello World!";
}
hello = () => {
return "Hello World!";
}
It gets shorter! If the function has only one statement, and the statement returns a value, you can remove the brackets and the return keyword:
Arrow Functions Return Value by Default:
hello = () => "Hello World!";
Note: This works only if the function has only one statement.
If you have parameters, you pass them inside the parentheses:
Arrow Function With Parameters:
hello = (val) => "Hello " + val;
In fact, if you have only one parameter, you can skip the parentheses as well:
Arrow Function Without Parentheses:
hello = val => "Hello " + val;
Complete Code For Arrow Function In JavaScript
<!DOCTYPE html>
<html>
<head>
<title>How To Use Arrow Function In JavaScript With Example</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css">
</head>
<style>
body{
background: black;
}
</style>
<body>
<div class="container">
<br>
<div class="text-center">
<h1 id="color" style="color: White">Use Arrow Function In JavaScript</h1>
</div>
<br>
<br>
<div class="well">
<h2 id="demo1"></h2>
<h2 id="demo2"></h2>
<h2 id="demo3"></h2>
<h2 id="demo4"></h2>
<script>
//without arrow
var hello;
hello = function() {
return "Hello World!";
}
document.getElementById("demo1").innerHTML = hello();
//with arrow
var h;
h = () => {
return "Hello World!";
}
document.getElementById("demo2").innerHTML = h();
hello = (val) => "Hello " + val;
document.getElementById("demo3").innerHTML = hello("Universe!");
hello = val => "Hello " + val;
document.getElementById("demo4").innerHTML = hello("Universe!");
</script>
</div>
</div>
</body>
</html>