The extension comes with a JavaScript implementation to display / close the quickview. Don't forget to include it in your project.
<div id="quickviewDefault" class="quickview">
<header class="quickview-header">
<p class="title">Quickview title</p>
<span class="delete" data-dismiss="quickview"></span>
</header>
<div class="quickview-body">
<div class="quickview-block">
...
</div>
</div>
<footer class="quickview-footer">
</footer>
</div>
<button class="button is-primary" data-show="quickview" data-target="quickviewDefault">Show quickview</button>
<script type="text/javascript" src="/node_modules/bulma-quickview/dist/bulma-quickview.min.js"></script>
Then just add the following code once your DOM's ready:
var quickviews = bulmaQuickview.attach(); // quickviews now contains an array of all Quickview instances