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Function returning another function in JavaScript
Following is the code wherein a function returns another function 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: 18px;
font-weight: 500;
color: blueviolet;
}
</style>
</head>
<body>
<h1>Function returning another function in JavaScript</h1>
<div class="result"></div>
<button class="Btn">CLICK HERE</button>
<h3>Click on the above button to double the number</h3>
<script>
let BtnEle = document.querySelector(".Btn");
let resEle = document.querySelector(".result");
function test() {
let b = 1;
return function () {
resEle.innerHTML = "Number = " + (b *= 2);
};
}
let returnFunc = test();
BtnEle.addEventListener("click", () => {
returnFunc();
});
</script>
</body>
</html>Output
On clicking the ‘CLICK HERE’ button, the number will be multiplied by 2 on each click −
Published on 16-Jul-2020 13:48:37
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