How to Change an Element's ID Attribute using JavaScript

JavaScript makes DOM manipulation extremely easy thanks to its powerful API.

One of the most useful things to know is how to change the id of an element programmatically.

In this post, we'll learn how to change an element's id attribute using JavaScript.

How to change an element's id attribute

To change an element's id attribute, we can use the setAttribute method.

This method is called on the element you want to change the attribute of, and pass the attribute name and the new value as arguments.

Let's first start off with the example HTML:

HTML
<div id="cat">Hello world</div>

Now, you can get the element by querying the DOM, like this:

JAVASCRIPT
const element = document.querySelector("#cat");

Then, you can change the id attribute like this:

JAVASCRIPT
const element = document.querySelector("#cat");

element.setAttribute("id", "dog");

Now, if you look at the DOM, it should look like this:

HTML
<div id="dog">Hello world</div>

Conclusion

In this post, we learned how to change an element's id attribute using JavaScript.

Simply use the setAttribute method and pass in the attribute name and the new value to it.

Thanks for reading and happy coding!

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