JSFiddle - React, Tailwind, and code Playground

HTML

<div class="features a"></div>
<div class="features b"></div>
<div class="features c"></div>

CSS

.a { height: 30px; background-color: red; }
.b { height: 120px; background-color: aqua; }
.c { height: 150px; background-color: blue; }

JavaScript

$(document).ready(function() {
    var maxHeight = -1;

    $('.features').each(function() {
      maxHeight = maxHeight > $(this).height();
    });
 $('.features').each(function() {
      $(this).height(maxHeight);
    });
   alert(this.maxheight);
});