API interactivity

In block.json : { supports: { interactivity: true }, viewScriptModule: file:./view.js }

1/ create directive

data-wp-interactive="namespace"

data-wp-context='{"foo": "bar"}' → local state

data-wp-class--{class-name} the class presence will be tied to a value

data-wp-bind--{attribute-name}

data-wp-on--{event-name}

2/ create a store

• state
• actions
• callback

• getElement()
• getContext()

Example

view.js :

import { store, getContext } from '@wordpress/interactivity';

store( 'wpdsfr', {
	actions: {
		toggle: () => {
			const context = getContext();
			context.isOpen = ! context.isOpen;
		},
	}
} );

render.php

<section
	data-wp-interactive="wpdsfr"
	data-wp-context='{ "isOpen": false}'
	<?php echo get_block_wrapper_attributes(); ?>>

	<h3	data-wp-on--click="actions.toggle">
		item title
	</h3>

	<div data-wp-class--is-open="context.isOpen">
		<?php echo $content; ?>
	</div>
</section>

Sources:

• https://make.wordpress.org/core/2024/03/04/interactivity-api-dev-note/
• https://developer.wordpress.org/news/2024/04/11/a-first-look-at-the-interactivity-api/
• https://developer.wordpress.org/block-editor/reference-guides/interactivity-api/api-reference/#list-of-directives (*)
• https://www.youtube.com/watch?v=49_XlQJYztA&list=LL&index=1