How to get element from an Iframe in JavaScript

In this tutorial, we are going to learn about how to get the html elements from an Iframe in JavaScript.

Consider we have a following <iframe> element in our index.html file.

<iframe id="myIframe" src="/index.html" width="500px" height="500px"></iframe>

Getting the element in Iframe

To get the element in an iframe, first we need access the <iframe> element inside the JavaScript using the document.getElementById() method by passing iframe id as an argument.

const iframe = document.getElementById("myIframe");

Now, it has and contentWindow property which returns the document object by using that we can access the elements from an Iframe.

const iWindow = iframe.contentWindow;
const iDocument = iWindow.document;

// accessing the element
const element = iDocument.getElementsByTagName("p")[0];
element.style.color = "green";

In the example above, we have accessed the first <p> element from an Iframe and changed its color to green.

Similarly, we can access and modify other elements in the iframe using document object.

Note: If you want to access an iframe, it should be on the same domain otherewise you can’t access it because of security reasons (like XSS).