JSFiddle - React, Tailwind, and code Playground

HTML

<div class="Body">
   <div class="LeftMenu">My menu</div>
   <div class="Content">Foo body</div>
   <div class="VerticalBanner">My menu</div>
   <div class="LeftMenu">My menu2</div>
   <div class="Content">Foo body2</div>
   <div class="VerticalBanner">My menu2</div>
</div>

CSS

.LeftMenu {
    background: blue;
    width: 20%;
}
.Content {
    background: red;
    width: 60%;
}
.VerticalBanner {
    background: green;
    width: 20%;
}
.Body { display: table; width: 100%; }
.Left, .Content, .VerticalBanner { display: table-cell; }