New createBlocksFromInnerBlocksTemplate Block API

There is a new BlockBlock Block is the abstract term used to describe units of markup that, composed together, form the content or layout of a webpage using the WordPress editor. The idea combines concepts of what in the past may have achieved with shortcodes, custom HTML, and embed discovery into a single consistent API and user experience. APIAPI An API or Application Programming Interface is a software intermediary that allows programs to interact with each other and share data in limited, clearly defined ways. in WordPress 5.6: createBlocksFromInnerBlocksTemplate, with which you can create blocks from InnerBlocks template.

Given an array of InnerBlocks templates or Block Objects, it returns an array of created Blocks from them.
It handles the case of having InnerBlocks as Blocks by converting them to the proper format to continue recursively.

This is especially useful for handling block variations, transformations and creation/replacement of blocks which use InnerBlocks template.

An example that would create new blocks from a block variation using InnerBlocks’ template and replace the block’s content is:

import { InnerBlocks } from '@wordpress/block-editor';
import { useDispatch } from '@wordpress/data';
import { __ } from '@wordpress/i18n';
import { Button, ToolbarGroup, ToolbarButton } from '@wordpress/components';
import { BlockControls, useBlockProps } from '@wordpress/block-editor';
import { createBlocksFromInnerBlocksTemplate } from '@wordpress/blocks';

function MyEditBlock( { clientId } ) {
    const { replaceInnerBlocks } = useDispatch( 'core/block-editor' );
    const variation = {
        name: 'my-variation',
        title: __( 'My variation' ),
        innerBlocks: [
            [ 'core/paragraph', { content: 'Hello' } ],
            [ 'core/paragraph', { placeholder: __( 'Write title…' ) } ],
        ],
    };
    const onClick = () => {
        replaceInnerBlocks(
            clientId,
            createBlocksFromInnerBlocksTemplate( variation.innerBlocks )
        );
    };
    return (
        <div { ...useBlockProps() }>
            <BlockControls>
                <ToolbarGroup>
                    <ToolbarButton onClick={ onClick }>
                        <span>Change InnerBlocks</span>
                    </ToolbarButton>
                </ToolbarGroup>
            </BlockControls>
            <InnerBlocks />
        </div>
    );
}

See the pull request for implementation details and more.

Props to @ntsekouras for writing this dev notedev note Each important change in WordPress Core is documented in a developers note, (usually called dev note). Good dev notes generally include: a description of the change; the decision that led to this change a description of how developers are supposed to work with that change. Dev notes are published on Make/Core blog during the beta phase of WordPress release cycle. Publishing dev notes is particularly important when plugin/theme authors and WordPress developers need to be aware of those changes.In general, all dev notes are compiled into a Field Guide at the beginning of the release candidate phase..

#5-6, #block-editor, #dev-notes