JSFiddle - React, Tailwind, and code Playground

HTML

<div id="a">a<br></div>
<div id="b">b<br>b<br></div>
<div id="c">c<br>c<br>c<br></div>

CSS

div {
    position: absolute;
    top: 0; bottom: 0;
    width: 30%;
}
#a {
    background-color: green;
    left: 0;
}
#b {
    background-color: yellow;
    left: 30%;
}
#c {
    background-color: blue;
    left: 60%;
}