Achieve a full-screen div that expands with its overflowing content

I only have one main div that holds all the content on my page. My aim is to achieve:

  • When the content doesn't go beyond the bottom, I want the div to take up 100% of the height.
  • If the content exceeds the bottom, then I want the div to expand and encompass all the content.

I've experimented with various combinations using height and min-height, but I'm having difficulty getting it right. Currently, this is what I have :

<!DOCTYPE html>
<html>
<head>
<style>
  html, body, #root {
    height: 100%;
    margin: 0;
  }

  #root {
    background: yellow;
  }  
</style>
</head>
<body>
  <div id="root">
    <div>Some content</div>
    <!-- more content here -->
  </div>
</body>
</html>

However, when you scroll down to view the overflowing content, the background disappears instead of growing with the content. How can I make it work as intended?

Answer №1

Swap out height: 100%; for min-height: 100vh;

Answer №2

The vh unit represents a proportion of the viewport's height. This allows you to ensure that the primary div fills at least the entire vertical space of the window by using the following CSS:

  body, #app {
    margin: 0;
  }
  #app {
    background-color: teal;
    min-height: 100vh;
  }  

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