how to add a url to a button in html code example

Example 1: href on a button

<button onclick="window.location.href='/page2'">Continue</button>

Example 2: buton html href

<!-- if you are on Window : --> 
<button onclick="window.location.href='page2.html'">
  Button
</button>

<!-- if you are on linux or macOS : -->
<button onclick="location.href='page2.html'">
  Button
</button>

Example 3: button href

a.button {
    -webkit-appearance: button;
    -moz-appearance: button;
    appearance: button;

    text-decoration: none;
    color: initial;
}