html5 - Bootstrap 3 Navbar won't Collapse -

please watch video go through problem i’m having. navbar won’t collapse when select link in mobile view.

video:https://www.youtube.com/watch?v=2dbpcfmjqy0

looking @ answers in question, , playing fiddle, following seems fix problem:

<li class="current"><a href="#home" data-toggle="collapse" data-target=".navbar-collapse.in">home </a></li> <li><a href="#about" data-toggle="collapse" data-target=".navbar-collapse.in">about</a></li> <li><a href="#contact" data-toggle="collapse" data-target=".navbar-collapse.in">contact</a></li> 

see updated fiddle here.