JSFiddle - React, Tailwind, and code Playground

by swfour

HTML

<div id="wrapper">
    <div id="left">
        <div id="left_top">A</div>
        <div id="left_bottom">B</div>
    </div>
    <div id="right">Content
        <br />Content
        <br />Content</div>
</div>

CSS

#wrapper {
    display:table;
    height:0%;
}
#left, #right {
    display:table-cell;
}
#left {
    background:grey
}
#left_top, #left_bottom {
    height: 50%;
}
#right {
    background:blue;
}