Time to add a second HTML page:
second.html;.html pages (in each HTML page, find the <a class=”…” href=”..”> links inside the #navbarToggle div and edit the hrefs to point to each-other);
pagename.html or ./pagename.html will do! DO NOT USE: absolute paths, e.g., C:\Users\…\pagename.html for obvious portability reasons!
.active) with your desired properties and append it to the appropiate menu link element: <a class=“nav-item nav-link” …> (also note: different class attribute values are separated by space!).