1. Go to this page and download the library: Download underpin/block-loader library. Choose the download type require.
2. Extract the ZIP file and open the index.php.
3. Add this code to the index.php.
<?php
require_once('vendor/autoload.php');
/* Start to develop here. Best regards https://php-download.com/ */
underpin / block-loader example snippets
// Register styles and scripts.
underpin()->styles()->add( 'test-style', [/*...*/] );
underpin()->scripts()->add( 'test-script', [/*...*/] );
// Register block
underpin()->blocks()->add( 'test', [
'name' => 'Test Block',
'description' => 'Description for block.',
'type' => underpin()->dir() . 'block.json', // Can be the block ID or a link to a block.json file. See register_block_type
'args' => [], // Optional. See register_block_type
] );