bootstrap 3 navbar collapse button not working

Question

I did some modification in navbar but now the toggle button is not responding on click. Below is my code. Where I am wrong ??

---

CODE:

Answer 1

You need to change in this markup

change the

data-target=".navbar collapse"

to

data-target=".navbar-collapse"

Reason : The value of data-target is a any class name of the associated nav div. In this case it is

  <-- Look at here
     

     .....

Js Fiddle Demo