Changeset 61981 for trunk/src/wp-includes/script-loader.php

Timestamp:

03/12/2026 05:44:22 AM (3 months ago)

Author:

westonruter

Message:

Script Loader: Move wp_load_classic_theme_block_styles_on_demand() from init to wp_default_styles.

This ensures the filters to opt in to loading separate block styles on demand are added at the moment WP_Styles is constructed. This accounts for styles being registered at the init action before register_core_block_style_handles() runs at priority 9. Without this, the wp-block-library stylesheet may get registered with the full combined block styles as style.css instead of just common.css, due to wp_should_load_block_assets_on_demand() still returning false. The wp_default_styles action still runs during init.

Developed in ​https://github.com/WordPress/wordpress-develop/pull/11232

Follow-up to r61008.

Props westonruter, adamsilverstein.
See #64099.
Fixes #64846.

File:

• trunk/src/wp-includes/script-loader.php (modified) (1 diff)

trunk/src/wp-includes/script-loader.php

@@ -3675 +3675 @@
  * Adds hooks to load block styles on demand in classic themes.
  *
+ * This function must be called before {@see wp_default_styles()} and {@see register_core_block_style_handles()} so that
+ * the filters are added to cause {@see wp_should_load_separate_core_block_assets()} to return true.
+ *
  * @since 6.9.0
+ * @since 7.0.0 This is now invoked at the `wp_default_styles` action with priority 0 instead of at `init` with priority 8.
  *
  * @see _add_default_theme_supports()
  */
-function wp_load_classic_theme_block_styles_on_demand() {
+function wp_load_classic_theme_block_styles_on_demand(): void {
     // This is not relevant to block themes, as they are opted in to loading separate styles on demand via _add_default_theme_supports().
     if ( wp_is_block_theme() ) {