I can replace the Featured Image control in current WP version by PHP:

add_filter( 'admin_post_thumbnail_html', 'my_admin_post_thumbnail_html', 10, 2 );

How do I do the same thing with Gutenberg?

  • 1
    This might be better raised on the GB issue tracker at GitHub, but I will say that since the new picker is entirely done in React, the likelihood of an equivalent filter working the same way is very low
    – Tom J Nowell
    Commented May 1, 2018 at 15:44
  • @TomJNowell thanks for the heads-up, has posted there
    – Edward
    Commented May 4, 2018 at 7:16
  • Ah you deleted it :( what if you find the answer, and come back and post it, or somebody else opens the same question, I'd undelete it if I were you :) It does no harm sitting here, and lots of deleted answers might fool the system into thinking you're a bad actor
    – Tom J Nowell
    Commented May 4, 2018 at 16:00
  • @TomJNowell, okey, some people are very critic at what question should be posted where and I didn't want to receive down votes.
    – Edward
    Commented May 5, 2018 at 13:18
  • Little late, but maybe this is relevant: github.com/WordPress/gutenberg/tree/master/packages/editor/src/… However, I haven't yet figured out how to actually insert any components in place of "The replacement contents or components." Commented Mar 15, 2019 at 14:21

1 Answer 1


Here is an example of adding a new component to the Featured Image area. This was taken from the official docs and updated to use JSX. I am using the @wordpress/scripts package to build this out.

// Import from the hooks package
import { addFilter } from '@wordpress/hooks';

// Some custom component to add.
const CustomComponent = ({ id }) => {
    return id ? (
        <h4>You selected an image, yay!</h4>
    ) : (
        <div>You have not selected anything</div>

// Function to be called by the hook that returns a function containing the new UI
function replacePostFeaturedImage(OriginalComponent) {
    return (props) => {
        const { featuredImageId } = props;
        return (
                <CustomComponent id={featuredImageId} />
                <OriginalComponent {...props} />

// Register the hook.

To replace the entire component, just remove <OriginalComponent /> from the replacePostFeaturedImage function.

Hope it helps and happy to add any further context as needed!

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