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Passing empty parameter to a method in JavaScript
Following is the code passing empty parameter to a method 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>Passing empty parameter to a method</h1>
<div class="result"></div>
<button class="Btn">Click here</button>
<h3>Click on the above button to call multiply function and pass empty
parameters to it</h3>
<script>
let resEle = document.querySelector(".result");
let BtnEle = document.querySelector(".Btn");
function multiply(a = 2, b = 4) {
return a * b;
}
BtnEle.addEventListener("click", () => {
resEle.innerHTML = "The multiplication of numbers = " + multiply();
});
</script>
</body>
</html>Output
On clicking the ‘Click here’ button −
Updated on: 17-Jul-2020
853 Views
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