apply_filters( ‘should_load_separate_core_block_assets’, bool $load_separate_assets )

User Contributed Notes

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   Fabian Kägy 6 months ago

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   Also whilst the default value of this filter is false it actually gets changed to true by default for any block theme.
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   Oliver Campion 6 months ago

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   Since v6.4 you need to add a priority of 11 for this filter to work if you are trying to force block themes to load all block styles rather than just those which WordPress detects are being used …

   add_filter( 'should_load_separate_core_block_assets', '__return_false', 11 );

   • You are my hero :) Number 11 saved my CLS.

     cresis 3 weeks ago
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   Will Skora 2 years ago

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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.

   • This hook affects only loading of core blocks, not third party blocks, hence the name *_core_block_assets

     Lovro Hrust 2 years ago
   • 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

     pkostadinov 2 years ago
   • 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.

     iSaumya 2 years ago
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   fredbir 1 year ago

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   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.