//To make button work like a tag do this:
<button type="button" onclick="window.location.href='index.html'">Go Back</button><button><a href='https://google.com' alt='Broken Link'>This is a button</a></button><input type="button" onclick="location.href='https://google.com';" value="Go to Google" />
<a href="https://google.com" class="button">Go to Google</a>
<button onclick="window.location.href='/page2'">Continue</button>