WordPress at a glance
function is not described

wp_scripts_get_suffix() WP 5.0.0

Returns the suffix that can be used for the scripts.

There are two suffix types, the normal one and the dev suffix.

No Hooks.

Return

String. The script suffix.

Usage

wp_scripts_get_suffix( $type );
$type(string)
The type of suffix to retrieve.
Default: ''

Code of wp scripts get suffix: wp-includes/script-loader.php WP 5.2.2

<?php
function wp_scripts_get_suffix( $type = '' ) {
	static $suffixes;

	if ( $suffixes === null ) {
		include( ABSPATH . WPINC . '/version.php' ); // include an unmodified $wp_version

		$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 ( $type === 'dev' ) {
		return $suffixes['dev_suffix'];
	}

	return $suffixes['suffix'];
}