Ways to ensure the height of a div matches the length of a page

I am attempting to create a div for content that spans the entire height of a page between my header and footer. Setting the height to 100% accomplishes this, but it only goes as high as the content within the div. There are times when I may have minimal content, like only one sentence, yet I want the div, complete with a background or border, to extend the length of the screen until it reaches the approximately 75px tall footer. Is there a simple way to achieve this using CSS? Currently, my CSS looks like this:

  <style>
  #content {
  margin-top: 0px;
  height: 800px;
  width: 800px;
   margin-left: auto;
   margin-right: auto;
    background-color: #E0E0E0 ;
   }
  </style>
   </head>
  <body>
  <div id="content"> 
  This is a div! With some centered content.
  </div>

Answer №1

To achieve full page height, include the CSS rule body, html { height:100% } and specify the height of your content element as height:100%.

Answer №2

To ensure that your height:100% property works properly, try including it in the html, body styles. If this still does not solve the issue, experiment with using the top:, bottom:, left:, right: properties for positioning.

The root of the problem lies in setting a height of 100% to your div without specifying the parent element's dimensions. Without a defined height on the parent element, the 100% value has no reference point. By setting a height attribute on html, body, you establish a clear dimension for the parent element, resolving the issue.

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