JSFiddle - React, Tailwind, and code Playground

by alnitak

HTML

<div id="frame">
<span>A</span><span>B</span>
</div>

CSS

div, span {
    margin: 0px;
    padding: 0px;
    border: 0px;
}

div {
    width: 121px;
}

span {
    display: inline-block;
    width: 50%;
}

JavaScript

var s = document.getElementsByTagName('span');
alert('sub pixel sizes = ' + (s[0].offsetWidth === s[1].offsetWidth));