wp-includes/class-wp-scripts.php:1016Checks if the strategy passed is a valid delayed (non-blocking) strategy.
$strategystring|mixedbool private function is_delayed_strategy( $strategy ): bool { return in_array( $strategy, $this->delayed_strategies, true ); }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.
$strategy retyped from string to string|mixed.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.