JSFiddle - React, Tailwind, and code Playground

HTML

<div class="plink" id="toggleP"><b>[CLICK ME] Show/hide P</b></div>
<div class="parent-g">
<div class="g">TEST</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
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<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
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<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div class="g">ok</div>
<div...

JavaScript

$(document).ready(function () {
    $('#toggleP').click(function() {
        $('#toggleP').html("Working...");
        $('div.parent-g').delay(1).toggle(500, function() {
            $('#toggleP').html("Show/hide P");
        });
    });
});