I need to make a search block by creating a new instance of the core / search block (a basic wordpress block). I tried with the registerBlockType function with which I get this error message:

  TypeError: (0 , c.__experimentalGetElementClassName) is not a function
        at J (index.js?ver=9c7b837095fa2fe0eb45:1:4524)
        at edit (index.js?ver=9c7b837095fa2fe0eb45:1:8127)
        at ct (react-dom.min.js?ver=17.0.1:9:43430)
        at os (react-dom.min.js?ver=17.0.1:9:111136)
        at Ur (react-dom.min.js?ver=17.0.1:9:77643)
        at Ir (react-dom.min.js?ver=17.0.1:9:77571)
        at Dr (react-dom.min.js?ver=17.0.1:9:77434)
        at Pr (react-dom.min.js?ver=17.0.1:9:74429)
        at react-dom.min.js?ver=17.0.1:9:30173
        at unstable_runWithPriority (react.min.js?ver=17.0.1:9:7431)

I also tried with the registerCoreBlocks () function, with which I get this answer instead:

blocks.min.js?ver=65…26a92a46af5c2e489:3 Block "core/search" is already registered.
Be  @   blocks.min.js?ver=65…26a92a46af5c2e489:3
Xy  @   block-library.min.js…a6ecc6aee441005c:14
t_  @   block-library.min.js…a6ecc6aee441005c:14
ha  @   edit-post.min.js?ver…66ab9a430d8318189:7
(anonimo)   @   post.php?post=1&action=edit:1747

I thank in advance anyone who will be able to help me.

EDIT1 This is my index.js with both the functions:

 * WordPress dependencies
 import { search as icon } from '@wordpress/icons';
 import { registerBlockType } from '@wordpress/blocks';

  * Internal dependencies
 import metadata from './block.json';
 import edit from './edit';
 import variations from './variations';
 import save from './save';
 import './style.scss';
 import './editor.scss';
 registerBlockType( metadata.name, {
     * Used to construct a preview for the block to be shown in the block inserter.
    example: {
        attributes: {
            message: 'Search 4',
     * @see ./edit.js
    edit: edit,
     * @see ./save.js
    variations: variations,
} );

 import { registerCoreBlocks } from '@wordpress/block-library';

  • What’s the actual code that produces these errors? Jul 15 at 9:12
  • @JacobPeattle index.js added Jul 15 at 9:33

1 Answer 1



After days of unsuccessful attempts, having tried all kinds of solutions, I decided to remove any reference to the method __experimentalGetElementClassName and solved the problem.

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