为什么此按钮中的文本不回退？

Question

I'll try and make it easier to help on this one.

Here is the HTML:

<button class="btn" id="follow-button"><i class="fa fa-twitter" aria-hidden="true"></i> Follow
  </button>

I want the button to change from saying "Follow" to "Following" when clicked. And when you click it while it says "Following" I want it to switch to "Follow".

How is this approached with JS?

Answer 1

There is no element on the page with the id extra-options. As a result,

$("#extra-options").is(':visible') always evaluates to false, and

$("#extra-options").Toggle(); always throws an error.

EDIT: as @phil points out in the comments, the Jquery toggle function is spelled with a lower case t