JSFiddle - React, Tailwind, and code Playground

HTML

<div id="content">
    <div id="bodySideBar">a
        <br>
        <br>
        <br>b</div>
    <div id="bodyUpdateBar">a
        <br>
        <br>
        <br>
        <br>
        <br>
        <br>
        <br>
        <br>
        <br>b</div>
    <div id="bodyContent">a
        <br>
        <br>
        <br>
        <br>
        <br>
        <br>b</div>
</div>

CSS

#content {
    width: 100%;
    height: 100%;
    padding: 0;
    margin: 0;
    display: table;
}
#bodyContent {
    display: table-cell;
    float: none;
    width: auto;
    height: 100%;
    background: #FFC273;
}
#bodySideBar {
    display: table-cell;
    width: 50px;
    height: 100%;
    background: #BF8130;
}
#bodyUpdateBar {
    display: table-cell;
    width: 200px;
    background: #FFCA40;
}