JSFiddle - React, Tailwind, and code Playground

HTML

<div id="wrapper">
    <div id="#\\/name">I'm alive!</div>
    <a class="open" href="#\\/name">Open</a>
</div>

CSS

#\\/name\\/ {
    display:none;
}
#\\/name\\/:target {
    display: inline-block;
}
#\\/name\\/:target ~ .open {
    display: none;
}