Getting access to the CSS class selector within the HTML document in the application

Question

Getting access to the CSS class selector within the HTML document in the application

Upon examining this snippet of HTML:

<html>
  ...
  <iframe>
    #document
    <html>
      ...
      <div className='change-me'></div>
      ...
    </html>
  </iframe>
</html>

This iframe has been extracted from the stripe React element, and I am interested in accessing and modifying its internal CSS settings.

In previous experiences with libraries containing reusable React components, it was a seamless task to tweak various CSS aspects effortlessly.

Challenge: However, my attempts at customization are proving futile in this scenario.

.change-me { background: red } // This declaration fails to apply

It is possible that the component's creation of its own HTML document is hindering my progress, or perhaps I am approaching the issue incorrectly...

html css reactjs

Answer 1

Answer №1

Simply relying on plain CSS won't cut it. To achieve the desired result, you'll have to dynamically change the class of the element using JavaScript and ensure that the CSS file with the necessary styling is included in the iframe.

One way to do this is by injecting your CSS file into the iframe:

var iFrame = document.getElementById("yourIframeId");
var head = iFrame.getElementsByTagName("head")[0];

var link = document.createElement('link');
link.rel = 'stylesheet';
link.href = 'path/to/cssFile.css';

head.appendChild(link);

Afterwards, you can assign your custom class to the target element like so:

iFrame.getElementById('targetElementId').classList.add("yourClass");

Answer 2

Simply relying on plain CSS won't cut it. To achieve the desired result, you'll have to dynamically change the class of the element using JavaScript and ensure that the CSS file with the necessary styling is included in the iframe.

One way to do this is by injecting your CSS file into the iframe:

var iFrame = document.getElementById("yourIframeId");
var head = iFrame.getElementsByTagName("head")[0];

var link = document.createElement('link');
link.rel = 'stylesheet';
link.href = 'path/to/cssFile.css';

head.appendChild(link);

Afterwards, you can assign your custom class to the target element like so:

iFrame.getElementById('targetElementId').classList.add("yourClass");

Getting access to the CSS class selector within the HTML document in the application

Answer №1

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