JSFiddle - React, Tailwind, and code Playground

HTML

<body>
  <div class="wrapper">
    <div class="container">
      <div class="nav">
        <p>Item 1</p>
        <p>Item 2</p>
        <p>Item 3</p>
        <p>Item 4</p>
        <p>Item 5</p>
      </div>
      <div class="content">
        <p>Content 1</p>
        <p>Content 2</p>
        <p>Content 3</p>
        <p>Content 4</p>
        <p>Content 5</p>
        <p>Content 6</p>
        <p>Content 7</p>
        <p>Content 8</p>        
      </div>
    </div>
  </div>
</body>

CSS

.wrapper {
  display: flex;
}

.container {
  width:100%;
  display: flex;
  min-height: 100vh;
}

.nav {
  background: grey;
  width: 200px;
}

.content {
  background: yellow;
  flex-grow:1;
}