Move WordPress jQuery to the footer

jquery-in-footer.php

<?php

/**
 * Move jQuery to the footer so that it is not render-blocking
 *
 * @param WP_Scripts $wp_scripts
 *
 * @return void
 */
function sitecare_jquery_in_footer( WP_Scripts $wp_scripts ) {

	if ( ! is_admin() ) {
		$wp_scripts->add_data( 'jquery', 'group', 1 );
		$wp_scripts->add_data( 'jquery-core', 'group', 1 );
		$wp_scripts->add_data( 'jquery-migrate', 'group', 1 );
	}
}
add_action( 'wp_default_scripts', 'sitecare_jquery_in_footer', 20 );