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Selected Reading
Execute a script when the element gets focus in HTML?
Use the onfocus attribute to execute a script when the element gets focus in HTML.
Example
You can try to run the following code to implement the onfocus attribute −
<!DOCTYPE html>
<html>
<body>
<p>Enter subject name below,</p>
Subject: <input type = "text" id = "sname" onfocus = "display(this.id)">
<br>
<script>
function display(val) {
document.getElementById(val).style.background = "blue";
}
</script>
</body>
</html> 
Updated on: 2020-06-01T10:41:55+05:30
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