JSFiddle - React, Tailwind, and code Playground

by Illya Moskvin

HTML

<div class="sidebar">
  sidebar fixed width
</div>
<div class="content">
  content flexible width
</div>

CSS

.sidebar {
    width: 180px;
    float: right;
    background: green;
}

.content {
    width: calc(100% - 180px);
    background: orange;
}