JSFiddle - React, Tailwind, and code Playground

by chovy

HTML

<html>
<body>
<main>
  <aside>
    <header>header</header>
    <nav>
      <ul>
      <li>link 1</li>
      <li>link 1</li>
      <li>link 1</li>
      <li>link 1</li>
      <li>link 1</li>
      <li>link 1</li>
      <li>link 1</li>
      <li>link 1</li>
      </ul>
    </nav>
  </aside>
  <section>
    grow this to 100% of either column.
    grow this to 100% of either column.
    grow this to 100% of either column.
    grow this to 100% of either column.
    grow this to 100% of either column.
    grow this to 100% of either column.
    grow this to 100% of either column.
    grow this to 100% of either column.
    grow this to 100% of either column.
    grow this to 100% of either column.
    grow this to 100% of either column.
    grow this to 100% of either column.
    grow this to 100% of either column.
    grow this to 100% of either column.
    grow this to 100% of either column.
    grow this to 100% of either column.
    grow this to 100% of either column.
    grow this to 100% of either column.
    grow this to 100% of either column.
    grow this to 100% of either column.
    grow this to 100% of either column.
    grow this to 100% of either column.
    grow this to 100% of either column.
    grow this to 100% of either column.
    grow this to 100% of either column.
    grow this to 100% of either column.
    grow this to 100% of either column.
    grow this to 100% of either column.
    grow this to 100% of either column.
    grow this to 100% of either column.
    grow this to 100% of either column.
    grow this to 100% of either column.
    grow this to 100% of either column.
    grow this to 100% of either column.
    grow this to 100% of either column.
    grow this to 100% of either column.
    grow this to 100% of either column.
    grow this to 100% of either column.
    grow this to 100% of either column.
    grow this to 100% of either column.
    grow this to 100% of either column.
    grow this to 100% of either column.
    grow this...

CSS

* {
  box-sizing: border-box;
  padding: 0;
  margin: 0;
}

html, body, main {
  height: 100%;
  min-height: 100vh;
  width: 100vw;
}

main {
  display: flex;
  justify-content: flex-start;
  align-items: flex-start;
}

aside {
  width: 100rem;
  border: 1px solid red;
  align-self: stretch;
  flex-grow: 1;
}

section {
  flex-grow: 1;
  border: 1px solid green;
}

nav ul {
  flex-grow: 1;
  border: 1px solid blue;
}

nav li {
  margin-bottom: 1rem;
}

nav li:last-child {
  margin-top: auto;
  margin-bottom: 0;
  color: blue;
  font-weight: 700;
}