6.4 beta 1: Function WP_Scripts::add_data was called incorrectly.

[kebbet]

Just updated to 6.4 beta 1, and got this warning with Query Monitor under the section ”Doing it wrong”, on both frontend and backend:

Function WP_Scripts::add_data was called incorrectly. 
Cannot supply a strategy `defer` for script `wp-block-image-view` 
because it is an alias (it lacks a `src` value). 
(This message was added in version 6.3.0.)

Call stack

    WP_Scripts->add_data()
    wp-includes/class-wp-scripts.php:819
    wp_register_script()
    wp-includes/functions.wp-scripts.php:194
    register_block_script_handle()
    wp-includes/blocks.php:191
    register_block_type_from_metadata()
    wp-includes/blocks.php:458
    register_block_core_image()
    wp-includes/blocks/image.php:311
    do_action('init')
    wp-includes/plugin.php:517

[mukesh27]

Thanks @kebbet you beats on the reporting the issue.

[swissspidy]

Related Slack discussion: ​https://wordpress.slack.com/archives/C02RQBWTW/p1695745900743789

See [56683] and ​https://github.com/WordPress/wordpress-develop/pull/5320

cc @westonruter @spacedmonkey

Trac ticket: https://core.trac.wordpress.org/ticket/59475

[mukesh27]

@kebbet Could you please review the PR as its working for me.

[spacedmonkey]

In 56744:

Editor: Avoid Deferring Loading for Empty Block Script URI

In the context of register_block_script_handle, the get_block_asset_url function may return false when an empty string is provided as the input. This behavior is intended to prevent the generation of invalid URLs. However, when the script loading strategy is set to "defer" while passing false, it triggers a "doing it wrong" message.

This situation becomes problematic, especially for scenarios where the scripts haven't been built yet. In such cases, the realpath call returns an empty string because the file doesn't exist. To address this issue, we now perform a simple check to ensure that the script URI is not empty before applying the "defer" loading strategy. This adjustment prevents unnecessary deferral of loading for scripts with empty URIs.

Follow on from [56683] and [56033].

Props kebbet, mukesh27, swissspidy, westonruter, spacedmonkey.
Fixes #59475

Committed in ​https://github.com/WordPress/wordpress-develop/commit/345fb48865215a1675ef209820951f6a4cf1e50d