Change the id of a html element using JavaScript

In this tutorial, we are going about how to change the id of a html element using JavaScript with the help of examples.

Consider, we have the following html element with a id attribute:

<h1 id="box">Main heading</h1>

Now, we need to change the id of a above html element.

Changing the id of a html element

To change the id of an html element, first we need to access the element inside the JavaScript using the document.getElementById() method.

const el = document.getElementById("box");

Now, the element object has a id property by using that we can change the id of an element.

el.id = "container";

Note: The document.getElementById() method takes the id attribute as an argument and returns the element object.

Full example

HTML:

<h1 id="box">Main heading</h1>

JavaScript:

const el = document.getElementById("box");
el.id = "container";

In the example above, we have changed the id of a html element from box to container.