The best way to add an event to any element is to use the addEventListener() method.
Following is the code to add an event 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: rebeccapurple;
}
</style>
</head>
<body>
<h1>Adding event in JavaScript</h1>
<div style="color: green;" class="result"<Hello world>/div>
<button class="Btn">CLICK HERE</button>
<h3>
Click on the above button to increment the font size of above text
</h3>
<script>
let resEle = document.querySelector(".result");
document.querySelector(".Btn").addEventListener("click", () => {
resEle.style.fontSize = "34px";
});
</script>
</body>
</html>Output
The above code will produce the following output −
On clicking the ‘CLICK HERE’ button −
