Get ID of Clicked Element using JavaScript

In this tutorial we will see How To Get ID of Clicked Element using JavaScript. The JavaScript this object is used which contain all properties of selected element.

HTML Code

HTML Code is given below, This code contains button elements, Whichever button is clicked, it will fire the getId() function and this object is passed to it.

<!DOCTYPE html>
<html>
<head>
    <title>Get ID of Clicked Element using JavaScript</title>
</head>
<body>
    <button id='1' onclick="getId(this)">Button 1</button>
    <button id='2' onclick="getId(this)">Button 2</button>
</body>
</html>

JavaScript Code

JavaScript Code is given below, In this code the JavaScript this object refers to the clicked button element.

The JavaScript function will take the selected button element as object inside the variable named 'btn'. This variable will be used as object to read id of the clicked button.

HTML Dom Id property is used to read the id, HTML dom id property of object sets or returns the id of html element.

The Id of clicked button is then displayed using alert method.

<script>
function getId(btn)
{
alert(btn.id);
}
</script>

Demo

Video Tutorial

Watch video tutorial on How To Get ID of Clicked Element using JavaScript.

Also Read Get ID of Clicked Element using JQuery.

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