apply_filters( 'should_load_separate_core_block_assets', bool $load_separate_assets )
Filters whether block styles should be loaded separately.
Description
Returning false loads all core block assets, regardless of whether they are rendered in a page or not. Returning true loads core block assets only when they are rendered.
Parameters
-
$load_separate_assetsbool -
Whether separate assets will be loaded.
Default false (all block assets are loaded, even when not used).
Source
File: wp-includes/script-loader.php.
View all references
return apply_filters( 'should_load_separate_core_block_assets', false );
Changelog
| Version | Description |
|---|---|
| 5.8.0 | Introduced. |
User Contributed Notes
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This hook is poorly named: when returning `true` with this hook; many 3rd-party blocks’ assets (JS and CSS) will only load when those blocks are being used on a page; slightly speeding up your website.
To use:
add_filter( 'should_load_separate_core_block_assets', '__return_true' );it only needs to be added once for each instance of WordPress you are working with; you do not need to add for each block or plugin that you wish to conditionally load.Top ↑
Feedback
This hook affects only loading of core blocks, not third party blocks, hence the name *_core_block_assets — By Lovro Hrust —
Based on my testing, this is correct – it does affects custom blocks. I have an open track ticket about it, and recently found that this filter was the actual culprit: https://core.trac.wordpress.org/ticket/54956 — By pkostadinov —
Just need to keep in mind one thing – that is when using this filter the styles/assets will get loaded almost at end of the body tag rather than loading in the HEAD tag. Not sure if it’s a bug or intended – but this is how it works. — By Saumya Majumder —
It should be noted that using this hook will then load inline styles in the body of the website and not the head, which will invalidate your website on W3C validator.