JSFiddle - React, Tailwind, and code Playground

by ozzon91

HTML

<ul class='menu_left'>
<li class='border_bot' style='width: 116px;'><a href="#">Logo muvik</a></li>
<li class='border_bot dropdown_menu'><span>Dota 2</span>
    <ul class='head_dropdown'>
        <li><a href="#">CS:GO</a></li>
        <li><a href="#">LINEAGE 2</a></li>
        <li><a href="#">DOTA 2</a></li>
        <li><a href="#">BUTTLEFIELD 3</a></li>
    </ul>
</li>
<li class='cat_item'><a href="#">Каталог</a></li>
</ul>

CSS

body {background: #141414;}

.head_dropdown {display: none;}

.menu_left .dropdown_menu:hover > .head_dropdown {
    display: block;
}

.border_bot {
    border-bottom: 2px #ED1C24 solid;
}

.menu_left {
    background: #000;
    list-style: none;
    position: relative;
    display: inline-block;
    font-family: arial;
    width: 100%;
    padding: 0;
}

.menu_left:after {
    content: ""; clear: both; display: block;
    color:#ffffff;
}
.menu_left li {
    float: left;
    color:#ffffff;    
    height: 40px;
}

.menu_left li a {
    display: block; 
    text-decoration: none;
    color:#ffffff;
    height: 40px;
}

.dropdown_menu {
    line-height: 40px;
}

.dropdown_menu span {
    border-left: 1px #282828 dashed;
    border-right: 1px #282828 dashed;
    display: block;
    padding-right: 20px;
    padding-left: 20px;
    height: 30px;
    line-height: 30px;
    
}

.head_dropdown {
    background-color: rgba(0, 0, 0, .5);
    position: absolute;
    top: 42px;
    width: 163px;
    height: 151px;
    padding: 0;
}
.head_dropdown li {
    float: none;
    position: relative;
    background-color: #141414;
    width: 143px;
    height: 30px;
    margin-top: 4px;
    margin-left: 10px;
    line-height: 30px;
    list-style: none;
}

.head_dropdown li:first-child {
    margin-top: 10px;
}

.cat_item {
    margin-left: 20px;
}

.head_dropdown li a {
    color: #999999;
    display: block;
    padding-left: 6px;
    text-decoration: none;
    width: 137px;
    height: 30px;
}

JavaScript

$('.head_menu').mouseenter(function() {
            $('.head_dropdown').css({height: '0'});
            $('.head_dropdown').animate({height: '152px'}, 150);
        }).mouseleave(function() {
                    $('.head_dropdown').animate({height: '0'}, 150);
                });

        $('.head_dropdown li').on('click', function() {
            var tex = $('.in_top').text();
            $('.head_dropdown li').find('a').removeClass('current_head_item');
            $(this).find('a').addClass('current_head_item');
            var chois = $(this).find('a').text();
            $('.in_top').text( chois );
        });