范例

范例1，来源于2020主题：

/**
 * Register and Enqueue Styles.
 */
function twentytwenty_register_styles() {

	$theme_version = wp_get_theme()->get( 'Version' );

	wp_enqueue_style( 'twentytwenty-style', get_stylesheet_uri(), array(), $theme_version );
	wp_style_add_data( 'twentytwenty-style', 'rtl', 'replace' );

	// Add output of Customizer settings as inline style.
	wp_add_inline_style( 'twentytwenty-style', twentytwenty_get_customizer_css( 'front-end' ) );

	// Add print CSS.
	wp_enqueue_style( 'twentytwenty-print-style', get_template_directory_uri() . '/print.css', null, $theme_version, 'print' );

}

add_action( 'wp_enqueue_scripts', 'twentytwenty_register_styles' );

/**
 * Register and Enqueue Scripts.
 */
function twentytwenty_register_scripts() {

	$theme_version = wp_get_theme()->get( 'Version' );

	if ( ( ! is_admin() ) && is_singular() && comments_open() && get_option( 'thread_comments' ) ) {
		wp_enqueue_script( 'comment-reply' );
	}

	wp_enqueue_script( 'twentytwenty-js', get_template_directory_uri() . '/assets/js/index.js', array(), $theme_version, false );
	wp_script_add_data( 'twentytwenty-js', 'async', true );

}

add_action( 'wp_enqueue_scripts', 'twentytwenty_register_scripts' );


/** Enqueue non-latin language styles
 *
 * @since Twenty Twenty 1.0
 *
 * @return void
 */
function twentytwenty_non_latin_languages() {
	$custom_css = TwentyTwenty_Non_Latin_Languages::get_non_latin_css( 'front-end' );

	if ( $custom_css ) {
		wp_add_inline_style( 'twentytwenty-style', $custom_css );
	}
}

add_action( 'wp_enqueue_scripts', 'twentytwenty_non_latin_languages' );

来源：wp-bootstrap-4主题

/**
 * Enqueue scripts and styles.
 */
function wp_bootstrap_4_scripts() {
wp_enqueue_style( 'open-iconic-bootstrap', get_template_directory_uri() . '/assets/css/open-iconic-bootstrap.css', array(), 'v4.0.0', 'all' );
wp_enqueue_style( 'bootstrap-4', get_template_directory_uri() . '/assets/css/bootstrap.css', array(), 'v4.0.0', 'all' );
wp_enqueue_style( 'wp-bootstrap-4-style', get_stylesheet_uri(), array(), '1.0.2', 'all' );

wp_enqueue_script( 'bootstrap-4-js', get_template_directory_uri() . '/assets/js/bootstrap.js', array('jquery'), 'v4.0.0', true );
wp_enqueue_script( 'wp-bootstrap-4-theme', get_template_directory_uri() . '/assets/js/theme.js', array('jquery'), '1.0.5', true );

if ( is_singular() && comments_open() && get_option( 'thread_comments' ) ) {
	wp_enqueue_script( 'comment-reply' );
	}
}
add_action( 'wp_enqueue_scripts', 'wp_bootstrap_4_scripts' );

说明：