Answers for "open popover on button click"

popover bootstrap 3

<a tabindex="0" class="btn btn-lg btn-danger" role="button" data-toggle="popover" data-trigger="hover" title="Dismissible popover" data-content="And here's some amazing content. It's very engaging. Right?">Dismissible popover</a>

bootsrap button popup text on hover

<span class="d-inline-block" tabindex="0" data-toggle="tooltip" title="Disabled tooltip">
  <button class="btn btn-primary" style="pointer-events: none;" type="button" disabled>Disabled button</button>
</span>