JSFiddle - React, Tailwind, and code Playground

HTML

<!doctype html>
<html lang="en">

<head>
  <!-- Required meta tags -->
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

  <!-- Bootstrap CSS -->
  <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO"
    crossorigin="anonymous">

  <link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.5.0/css/all.css" integrity="sha384-B4dIYHKNBt8Bc12p+WXckhzcICo0wtJAoU8YZTY5qE0Id1GSseTk6S+L3BlXeVIU"
    crossorigin="anonymous">

  <title>Hello, world!</title>
</head>
<style>
 
</style>

<body>

  <ul id="sidebar" class="nav flex-column" onmouseover="HoverOpenSideBar()" onmouseout="HoverCloseSideBar()">

    <div id="TitleSidebar" class="pt-2 pb-3 px-1 d-flex" >
      <span id="sidelogo" class="mr-auto p-2">Logo</span>
      <button type="button" class="btn btn-default" href="#" onclick="OpenCloseSideBar()" >
        <span class="fas fa-align-justify" aria-hidden="true"></span>
      </button>
    </div>


    <li id="list1" class="nav-item ">
      <a id="toggleDropDown" class="nav-link active px-0 " data-toggle="collapse"  href="#submenu1" aria-expanded="false">
        <div id="list2" class=" d-flex  align-items-center ">
          <span id="list3" class=" pl-3 fas fa-comment-dots"></span>
          <span class="list4 ml-3 text-nowrap">Dashboard one</span>
          <span class="fas fa-angle-right ml-3"></span>
         
        </div>
        
      </a>
    </li>

     <!-- Submenu content -->
     <div id='submenu1' class="collapse" >
      <a href="#" class="list-group-item list-group-item-action py-1">
        <div id="abcd" class="d-flex align-items-center pl-2 " >
          <span class="fas fa-circle"></span>
          <span class="menu-collapsed ml-2">Charts</span>
        </div>
      </a>
      <a href="#" class="list-group-item list-group-item-action...

CSS

#sidebar {
    margin: 0;
    padding: 0;
    width: 220px;
    position: fixed;
    height: 100%;
    overflow: auto;
    transition: 0.7s; 
    background:  #292C3E;
  }

  #topbar{
    margin-left: 220px;
    transition: 0.7s; 
  }

  #main {
    margin-left:  250px;
    transition: margin-left .7s; 
}

#list1{
  background:   #292C3E;
  
}
#list2{
  background:   blue;
}

#list2:hover {
  background: yellow;
}

#list3{
  font-size: 20px;
  color: lightgray;
}

.list4{
 
  background: red;
  font-size: 16px;
 
}
#TitleSidebar{
  background:green;

}

#sidelogo{
  background: lime;
}


.menu-collapsed{
  font-size: 16px;
}

.fa-circle{
  font-size: 10px;

}