Bootstrap dropdown in collapse not showing on first attempt

Question

I have a dropdown menu inside a nav-collapse.

When I reduce the window\'s width (eg: 700px), the navbar correctly collapses, then I click on btn-navbar to un-collaps

Answer 1

A lot of people were reporting this as a bug on the repo (eg. Issue #5671, Issue #5890, Issue #6019).

In response to #5671, someone points out that as per the docs on responsive Navbar, when using the class navbar-collapse you must also include collapse. Seems that your example suffers from this same (albeit easily overlooked) flaw.

Here's a working example of your code, the only difference being adding the collapse class:

Plunker