Bootstrap implementation of response navigation bar effect _javascript skills

To add a response feature to the navigation bar, the content you want to fold must be wrapped in <div> with classes. Collapse,. Navbar-collapse. The folded navigation bar is actually a button with class. Navbar-toggle and two data-elements. The first is Data-toggle, which tells JavaScript what to do with the button, and the second is Data-target, which indicates which element to switch to. Three <span> with class. Icon-bar to create the so-called Hamburg button. These will switch to the elements in the. Nav-collapse <div>. In order to achieve these features, you must include a Bootstrap folding (Collapse) plug-in.
Effect Chart:

The following example demonstrates this:

<! DOCTYPE html>  

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