wordpress-zerro/functions.php

<?php

define('BOOTSTRAP_VERSION', '5.3.1');
define('BOOTSTRAP_ICON_VERSION', '1.9.1');

function zerro_setup() {

	add_theme_support( 'menus' );
	add_theme_support( 'title-tag' );
	
	add_theme_support(
		'post-formats',
		array(
			'image',)
	);

}

function bootstrap_script_init() {
	wp_enqueue_style( 'bootstrap_icons', get_template_directory_uri() . '/css/bootstrap-icons.css', array(), BOOTSTRAP_ICON_VERSION, 'all' );
	wp_enqueue_style( 'bootstrap', get_template_directory_uri() . '/css/bootstrap.min.css', array(), BOOTSTRAP_VERSION, 'all' );
	wp_enqueue_style( 'main-style', get_stylesheet_uri());

	wp_enqueue_script('main', get_template_directory_uri() . '/js/main.js');
	wp_enqueue_script('bootstrap', get_template_directory_uri() . '/js/bootstrap.bundle.min.js', [ 'jquery' ] );
}

add_action( 'after_setup_theme', 'zerro_setup' );
add_action( 'wp_enqueue_scripts', 'bootstrap_script_init' );

?>