I have a webpage, and all I can do is add code, not remove or change existing code.<br><br>So I have used CSS to modify/remove parts I don't need, and thats worked fine.<br><br>However there is a ...

AFAIK, CSS cannot affect the DOM tree. So, display: none just says the element should not be displayed, not that it should cease to exist. Style/structure separation and all that.

Add the following code to the div's tag definition:style="height: 100%"This property forces the navigation panel to render at 100 percent of the page's height, so the panel stretches to the bottom ...

The JavaScript used to show/hide the menu in mobile is seen in Listing 4. Note how it just uses the Tailwind hidden class. This script goes at the end of the HTML body.