<style>
[x-cloak] { display: none }
</style>
<body x-cloak x-data="{openModal: false}"
:class="openModal ? 'overflow-hidden' : 'overflow-visible'"
>
// button
<button @click="openModal = true">
Open Modal
</button>
<!-- Modal -->
<div x-show="openModal">
<!-- content -->
</div>
</body>