gistfile1.js

nav-bar.js
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import {bindable} from 'aurelia-framework';

export class NavBar {
  @bindable router = null;

  constructor(){
    console.log('Constructor');
    this.App = System.App;
  }

}
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nav-bar.html
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<template>
  <nav class="navbar navbar-default navbar-fixed-top" role="navigation">
    <div class="navbar-header">
      <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1">
        <span class="sr-only">Toggle Navigation</span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
      </button>
      <a class="navbar-brand" href="#">
        <i class="fa fa-home"></i>
        <span>${router.title}</span>
      </a>
    </div>

    <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
      <ul class="nav navbar-nav" show.bind="App.isVisible">
        <li repeat.for="row of router.navigation" class="${row.isActive ? 'active' : ''}">
          <a href.bind="row.href">${row.title} ${isVisible}</a>
        </li>
      </ul>

      <ul class="nav navbar-nav navbar-right">
        <li class="loader" if.bind="router.isNavigating">
          <i class="fa fa-spinner fa-spin fa-2x"></i>
        </li>
      </ul>
    </div>
  </nav>
</template>
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