JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<html lang="ru">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=7; IE=Edge">
<title></title>
<meta name="description" content="">
<link rel="stylesheet" href="css/test.css">
<script src='https://cdnjs.cloudflare.com/ajax/libs/jquery/3.1.0/jquery.min.js'></script>
<script src="js/menupc.js"></script><!--меню пк-->
</head> 
<body>
    

<div class="dark"></div>
<div class="side_menu">
	<div class="burger_box">
		<div class="menu-icon-container">
			<a href="#" class="menu-icon js-menu_toggle closed">
				<span class="menu-icon_box">
					<span class="menu-icon_line menu-icon_line--1"></span>
					<span class="menu-icon_line menu-icon_line--2"></span>
					<span class="menu-icon_line menu-icon_line--3"></span>
				</span>
			</a>
		</div>
	</div>

	<div class="container">
		<ul class="list_load">
			<li class="list_item"><a href="#">list_item1</a></li>
			<li class="list_item"><a href="#">list_item2</a></li>
			<li class="list_item"><a href="#">list_item3</a></li>
			<li class="list_item"><a href="#">list_item4</a></li>
			<li class="list_item"><a href="#">list_item5</a></li>
			<li class="list_item"><a href="#">list_item6</a></li>
			<li class="list_item"><a href="#">list_item7</a></li>
			<li class="list_item"><a href="#">list_item8</a></li>
            <li class="list_item"><a href="#">list_item9</a></li>
			<li class="list_item"><a href="#">list_item10</a></li>
			<li class="list_item"><a href="#">list_item11</a></li>
			<li class="list_item"><a href="#">list_item12</a></li>
			<li class="list_item"><a href="#">list_item13</a></li>
			<li class="list_item"><a href="#">list_item14</a></li>
			<li class="list_item"><a href="#">list_item15</a></li>
			<li class="list_item"><a href="#">list_item16</a></li>
            <li class="list_item"><a href="#">list_item17</a></li>
			<li class="list_item"><a href="#">list_item18</a></li>
			<li class="list_item"><a...

CSS

* {
	padding: 0;
	margin: 0;
 }

body {background: #5e8cba;}

/*Меню ПК*/
/*Кнопка*/
.burger_box {
display: block;
		float: right;
		margin-right: -45px;
}

.burger_box .menu-icon_box {
  position: relative;
  display: inline-block;
  width: 28px;
  height: 26px;
  border: 1px solid rgba(255,255,255,.4);
  padding: 10px 9px;
  border-radius: 8px;
}

.burger_box .menu-icon_box:hover {
  border: 1px solid #fff;
}

.burger_box .menu-icon_line {
  position: absolute;
  display: inline-block;
  background: #fff;
  margin-top: 10px;
  border-radius: 20px;
  height: 4px;
  width: 28px;
}

.burger_box .menu-icon_line--1 {
  top: 1px;
}

.burger_box .menu-icon_line--2 {
  top: 11px;
}

.burger_box .menu-icon_line--3 {
  top: 21px;
}
	
.burger_box .menu-icon.opened .menu-icon_line {
  top: 10px;
}

.burger_box .menu-icon.opened .menu-icon_line--1 {
  transform: rotate3d(0, 0, 1, 45deg);
  -webkit-transform: rotate3d(0, 0, 1, 45deg);
}

.burger_box .menu-icon.opened .menu-icon_line--2 {
  opacity: 0;
}

.burger_box .menu-icon.opened .menu-icon_line--3 {
  transform: rotate3d(0, 0, 1, -45deg);
  -webkit-transform: rotate3d(0, 0, 1, -45deg);
}

/*Выпадающее меню*/
.side_menu {
  position: fixed;
  background: #fff;
  height: 100%;
  left: -300px;
  top: 0;
  width: 300px;
  -webkit-transition: all 300ms ease-in-out;
  transition: all 300ms ease-in-out;
  z-index: 9999;
}

.dark {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.5);
  z-index: 9999;
}

/*Для слов*/
.list_load {
  display: none;
  list-style: none;
  padding: 0;
}

.side_menu .container {
  margin-left: 20px;
  margin-top: 13px;
  overflow-y: scroll;
  height: 100%;
  width: 273px;
}

.list_item a {
  display: block;
  font-family: system, -apple-system, BlinkMacSystemFont, Segoe UI, tahoma, Arial, sans-serif;
  font-size: 16px;
  color: #000;
  padding: 0px 15px;
  line-height: 38px;
  text-decoration: none;
}

.list_item a:hover {
  background:...

JavaScript

$(document).on('click','.js-menu_toggle.closed',function(e){
	e.preventDefault(); $('.list_load, .list_item').stop();
	$(this).removeClass('closed').addClass('opened');
    $('.dark').css({'display': 'block'})

	$('.side_menu').css({ 'left':'0px' });

	var count = $('.list_item').length;
	$('.list_load').slideDown( (count*.0)*0 );
	$('.list_item').each(function(i){
		var thisLI = $(this);
		timeOut = 0*i;
		setTimeout(function(){
			thisLI.css({
				'opacity':'1',
				'margin-left':'0'
			});
		},0*i);
	});
});

$(document).on('click','.js-menu_toggle.opened',function(e){
	e.preventDefault(); $('.list_load, .list_item').stop();
	$(this).removeClass('opened').addClass('closed');
    $('.dark').css({'display': 'none'})

	$('.side_menu').css({ 'left':'-300px' });

	var count = $('.list_item').length;
	$('.list_item').css({
		'opacity':'0',
		'margin-left':'-20px'
	});
	$('.list_load').slideUp(0);
});

function close_l() {
$('.dark').css({'display': 'none'})
  $('.list_load, .list_item').stop();
  $('.js-menu_toggle.opened').removeClass('opened').addClass('closed');

  $('.side_menu').css({ 'left':'-300px' });

  var count = $('.list_item').length;
  $('.list_item').css({
    'opacity':'0',
    'margin-left':'-20px'
  });
  $('.list_load').slideUp(0);
}

$(document).on('click','.dark',function(e){
 close_l();
});

$(document).on('click','.js-menu_toggle.opened',function(e){
 close_l();
});