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Effective Function Signatures with Default and Rest Parameters in JavaScript
Following is the code for to implement function Signatures with Default and Rest Parameters 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>Function Signatures with Default and Rest Parameters</h1>
<div class="result"></div>
<br />
<button class="Btn">CLICK HERE</button>
<h3>Click on the above button to call the add() function with multiple parameters</h3>
<script>
let BtnEle = document.querySelector(".Btn");
let resEle = document.querySelector(".result");
function add(a = 0, b = 0, ...param) {
let total = 0;
total += a + b;
param.forEach((item) => {
total += item;
});
return total;
}
BtnEle.addEventListener("click", (event) => {
resEle.innerHTML =
"The total sum = " + add(2, null, 22, 11, 33, 44, 55);
});
</script>
</body>
</html>
Output
On clicking the ‘CLICK HERE’ button −
Updated on: 2020-07-18T07:37:05+05:30
118 Views
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