The focus event is fired when an element either gets or loses focus. Following are the focus events −
| Event | Description |
|---|---|
| Blur | This event is fired when an element loses focus. |
| Focus | This event is fired when the element gets the focus. |
| focusin | This event is fired when the element is about to get focus. |
| ocusout | This event is fired when an element is about to lose focus. |
Following is the code for focus events 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;
}
input {
padding: 10px;
}
</style>
</head>
<body>
<h1>Focus events in Javascript</h1>
<form id="form">
<input type="text" placeholder="Username" />
<input class="passW" type="password" placeholder="Password" />
</form>
<h3>Focus on the above password input box to change its background color</h3>
<script>
let passEle = document.querySelector(".passW");
passEle.addEventListener("focus", () => {
passEle.style.backgroundColor = "#90EE90";
});
</script>
</body>
</html>Output
On focusing on the password field −
