responsive nav bar code example

Example 1: bootstrap navigation bar

<nav class="navbar navbar-expand-lg navbar-light bg-light">
  <a class="navbar-brand" href="#">Navbar</a>
  <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
    <span class="navbar-toggler-icon"></span>
  </button>

  <div class="collapse navbar-collapse" id="navbarSupportedContent">
    <ul class="navbar-nav mr-auto">
      <li class="nav-item active">
        <a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="#">Link</a>
      </li>
      <li class="nav-item dropdown">
        <a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
          Dropdown
        </a>
        <div class="dropdown-menu" aria-labelledby="navbarDropdown">
          <a class="dropdown-item" href="#">Action</a>
          <a class="dropdown-item" href="#">Another action</a>
          <div class="dropdown-divider"></div>
          <a class="dropdown-item" href="#">Something else here</a>
        </div>
      </li>
      <li class="nav-item">
        <a class="nav-link disabled" href="#">Disabled</a>
      </li>
    </ul>
    <form class="form-inline my-2 my-lg-0">
      <input class="form-control mr-sm-2" type="search" placeholder="Search" aria-label="Search">
      <button class="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
    </form>
  </div>
</nav>

Example 2: css responsive navigation

#header{
position:fixed;
z-index:1000;
left:0;
top:0;
width:100vw;
height:auto;
}

#header .header{
min-height:8vh;
background-color: rgba(0,0,0,0.3);
}

#header .nav-bar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  width:100%;
  height:100%;
  max-width:1300px;
  padding:0 10px;
}

#header .nav-list ul{
  list-style:none;
  position:absolute;
  background-color:rgb(31,30,30);
  width:100vw;
  height:100vh;
  left:0;
  top:0;
  display:flex;
  flex-direction:column;
  justify-content:center;
  align-items:center;
  z-index:1;
  overflow-x:hidden;
}

#header .nav-list ul a{
  font-size:2.5rem;
  font-weight:500;
  letter-spacing: .2rem;
  text-decoration:none;
  color:white;
  text-transform:uppercase;
  padding:20px;
  display:block;
  
  
}