1<div ng-controller="NavbarCtrl">
 2  <nav class="navbar navbar-expand-lg navbar-light bg-light">
 3    <a class="navbar-brand" href="#">
 4      <i title="Server" class="fa fa-cube fa-1x"></i> decentralized-blogging-platform
 5    </a>
 6    <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
 7    <span class="navbar-toggler-icon"></span>
 8  </button>
 9
10    <div class="collapse navbar-collapse" id="navbarSupportedContent">
11      <ul class="navbar-nav mr-auto">
12        <li class="nav-item active">
13          <a class="nav-link" href="#">Top Posts <span class="sr-only">(current)</span></a>
14        </li>
15        <li class="nav-item">
16          <a class="nav-link" href="#">Top Writters</a>
17        </li>
18      </ul>
19      <form class="form-inline my-2 my-lg-0">
20        <input class="form-control mr-sm-2" type="search" placeholder="Search" aria-label="Search">
21        <button class="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
22      </form>
23      <ul class="navbar-nav" ng-show="user">
24        <li class="nav-item">
25          <a href="#!/profile" class="nav-link">
26            <i title="Profile" class="fa fa-user fa-1x"></i> {{user.username}}
27          </a>
28        </li>
29        <li class="nav-item">
30          <a ng-click="logout()" class="nav-link">
31            <i title="Logout" class="fa fa-power-off fa-1x"></i>
32          </a>
33        </li>
34      </ul>
35      <ul class="navbar-nav" ng-show="!user">
36        <li class="nav-item">
37          <a href="#!/signup" class="nav-link">
38            <i title="Signup" class="fa fa-sign-in fa-1x"></i> Signup
39          </a>
40        </li>
41        <li class="nav-item">
42          <a href="#!/login" class="nav-link">
43            <i title="Login" class="fa fa-sign-in fa-1x"></i> Login
44          </a>
45        </li>
46      </ul>
47    </div>
48  </nav>
49</div>