wp-includes/script-loader.php:682Returns the suffix that can be used for the scripts.
$typestringoptional''stringfunction wp_scripts_get_suffix( $type = '' ) { static $suffixes; if ( null === $suffixes ) { /* * Include an unmodified $wp_version. * * Note: wp_get_wp_version() is not used here, as this file can be included * via wp-admin/load-scripts.php or wp-admin/load-styles.php, in which case * wp-includes/functions.php is not loaded. */ require ABSPATH . WPINC . '/version.php'; /* * Note: str_contains() is not used here, as this file can be included * via wp-admin/load-scripts.php or wp-admin/load-styles.php, in which case * the polyfills from wp-includes/compat.php are not loaded. */ $develop_src = false !== strpos( $wp_version, '-src' ); if ( ! defined( 'SCRIPT_DEBUG' ) ) { define( 'SCRIPT_DEBUG', $develop_src ); } $suffix = SCRIPT_DEBUG ? '' : '.min'; $dev_suffix = $develop_src ? '' : '.min'; $suffixes = array( 'suffix' => $suffix, 'dev_suffix' => $dev_suffix, ); } if ( 'dev' === $type ) { return $suffixes['dev_suffix']; } return $suffixes['suffix'];}Introduced in 5.0.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/script-loader.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.