wp-includes/class-wp-scripts.php:1079Filter the list of eligible loading strategies for a script.
$handlestring$eligible_strategiesstring[]|nulloptionalnull$checkedoptionalarray()$stored_resultsarrayoptionalarray()string[] private function filter_eligible_strategies( $handle, $eligible_strategies = null, $checked = array(), array &$stored_results = array() ) { if ( isset( $stored_results[ $handle ] ) ) { return $stored_results[ $handle ]; } // If no strategies are being passed, all strategies are eligible. if ( null === $eligible_strategies ) { $eligible_strategies = $this->delayed_strategies; } // If this handle was already checked, return early. if ( isset( $checked[ $handle ] ) ) { return $eligible_strategies; } // Mark this handle as checked. $checked[ $handle ] = true; // If this handle isn't registered, don't filter anything and return. if ( ! isset( $this->registered[ $handle ] ) ) { return $eligible_strategies; } // If the handle is not enqueued, don't filter anything and return. if ( ! $this->query( $handle, 'enqueued' ) ) { return $eligible_strategies; } $is_alias = (bool) ! $this->registered[ $handle ]->src; $intended_strategy = $this->get_data( $handle, 'strategy' ); // For non-alias handles, an empty intended strategy filters all strategies. if ( ! $is_alias && empty( $intended_strategy ) ) { return array(); } // Handles with inline scripts attached in the 'after' position cannot be delayed. if ( $this->has_inline_script( $handle, 'after' ) ) { return array(); } // If the intended strategy is 'defer', filter out 'async'. if ( 'defer' === $intended_strategy ) { $eligible_strategies = array( 'defer' ); } $dependents = $this->get_dependents( $handle ); // Recursively filter eligible strategies for dependents. foreach ( $dependents as $dependent ) { // Bail early once we know the eligible strategy is blocking. if ( empty( $eligible_strategies ) ) { return array(); } $eligible_strategies = $this->filter_eligible_strategies( $dependent, $eligible_strategies, $checked, $stored_results ); } $stored_results[ $handle ] = $eligible_strategies; return $eligible_strategies; }Introduced in 6.3.0. One change between 6.7.7 and 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
$stored_results added.verified against sourcesrc/wp-includes/class-wp-scripts.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.