JSFiddle - React, Tailwind, and code Playground

HTML

<div class="wrapper">
	<div class="b box">
		&nbsp;
	</div>

	<div class="b box">
		&nbsp;
	</div>

	<div class="b box">
		&nbsp;<br>
		&nbsp;<br>
		&nbsp;<br>
		&nbsp;<br>
	</div>

	<div class="b box">
		&nbsp;
	</div>
</div>
        
<input id="button" type="button" value="Fix it" />

CSS

.b {
		border: 1px solid #000;
	}

	.box {
		float: left;
		width: 100px;
	}

JavaScript

$("#button").click(function() {
    var h_box = 0;
    
    $("div.box").each(function() {
        if ($(this).height() > h_box) {
            h_box = $(this).height();
        }
    });
    
    $("div.box").each(function() {
        $(this).height(h_box);
    });
});