JSFiddle - React, Tailwind, and code Playground

by Alejandro

HTML

<p class="btn">Grab a random block!</p>
<div class="blocks">
    <div>Block 1</div>
    <div>Block 2</div>
    <div>Block 3</div>
    <div>Block 4</div>
    <div>Block 5</div>
    <div>Block 6</div>
    <div>Block 7</div>
    <div>Block 8</div>
    <div>Block 9</div>
    <div>Block 10</div>
</div>

CSS

.blocks div {
    height: 60px;
    width: 110px;
    background-color: blue;
    color: #fff;
    margin: 5px;
    display: inline-block;
    padding: 40px 10px 10px 10px;
    font-weight: bold;
    font-size: 20px;
    text-align: center;
    display: none;
}
.blocks div:nth-child(2n) {
    background-color: #5993e0;
}
.btn {
    background-color: gray;
    padding: 7px 15px;
    width: 160px;
    color: #fff;
    border-radius: 5px;
    text-align: center;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}
.btn:hover {
    cursor: pointer;
}

JavaScript

$('.btn').click( function() {
	var count = $('.blocks div').length;
	var randomer = Math.ceil(Math.random() * count)
	$('.blocks div').each(function () {
		var pos = $(this).index() + 1;
		$(this).hide();
		if (pos == randomer) {
			$(this).show();
		}
	});
});