JSFiddle - React, Tailwind, and code Playground

HTML

<div id="one"></div>
<div id="two"></div>

CSS

#one, #two{
    display:inline-block;
    width:150px;
    border:1px solid red;
    margin:0 10px;
    vertical-align:top;
}
#one{
    height:200px;
}

JavaScript

$("#two").height($("#one").height());