That's how I connect js and css
function bankadata_include_js() { wp_enqueue_script( 'myscript1', 'assets/js/main_slider.js', array('jquery') ); wp_enqueue_script( 'myscript2', 'assets/js/second_slider.js', array('jquery') ); } function bankadata_include_css() { wp_enqueue_style('my-styles-1', plugins_url("assets/css/style.css", __FILE__)); wp_enqueue_style('my-styles', "https://maxcdn.bootstrapcdn.com/font-awesome/4.5.0/css/font-awesome.min.css"); } add_action('wp_enqueue_scripts','bankadata_include_js'); add_action('wp_enqueue_scripts','bankadata_include_css'); Slider code itself
$(document).ready(function(){ $('.tabs_menu a').click(function(e){ e.preventDefault(); $('.tabs_menu .active').removeClass('active'); $(this).addClass('active'); var tab = $(this).attr('href'); $('.tab').not(tab).css({'display':'none'}); $(tab).fadeIn(400); }); }); The script itself, without inserting into wp the plugin works as it should. CSS and HTML code pastebin.com/VQXi8FZy