Function and usage of get_block_asset_url() in wordpress


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    The get_block_asset_url() function in WordPress is designed to retrieve the URL of a block asset. Here's a detailed explanation of its functionality and usage:

    Function Definition

    get_block_asset_url( string $path ): string|false


    This function is used to get the URL to a block asset within WordPress. Block assets are typically files related to Gutenberg blocks, such as JavaScript or CSS files.


    • $path (string, required): This is a normalized path to a block asset. A normalized path means it should be a relative path from a known directory, like the root of your WordPress installation or the root of your theme or plugin directory.

    Return Value

    • The function returns a string or false:
      • string: If successful, it returns the full URL to the specified block asset.
      • false: It returns false if it fails to find the asset or construct the URL.

    Sample Usage

    Here's an example of how get_block_asset_url() might be used in a WordPress theme or plugin:

    // Example: Getting the URL of a JavaScript file for a custom block
    $script_path = 'js/my-custom-block.js'; // Relative path to the JS file
    $script_url = get_block_asset_url($script_path);
    if ($script_url !== false) {
        // Enqueue the script using the resolved URL
        wp_enqueue_script('my-custom-block-script', $script_url);
    } else {
        // Handle the error scenario, maybe log it or provide a fallback
        error_log('Failed to load script: ' . $script_path);

    In this example, get_block_asset_url() is used to find the full URL of a JavaScript file (my-custom-block.js) that is part of a custom Gutenberg block. If the URL is successfully retrieved, the script is enqueued using wp_enqueue_script(). If not, an error is logged.


    • It's important to ensure that the path provided to get_block_asset_url() is correct and relative to a known directory.
    • This function is particularly useful when working with Gutenberg blocks, as it helps manage block assets more efficiently.

    Remember, this function is part of the WordPress core and is subject to changes in different versions of WordPress. Always refer to the latest WordPress documentation for the most up-to-date information.

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