In order to modify the navigation bar color, you must include the overflow property

As I work on my product landing page, I encountered an interesting issue when trying to change the color of the navigation bar. It seems that I can only do so after adding the overflow property to the ul element. Can someone shed some light on why this is necessary? I understand that overflow:hidden prevents text from going outside the list, but I'm curious about its connection to changing colors.


ul{
  list-style-type: none;
  margin: 0;
  padding: 0;
  background-color: #dddddd;
  overflow: hidden;
}

li{
  float: left;
}

li a{
  display: block;
  padding: 30px;
}

If you're interested, here's the link to the project https://codepen.io/Alicinetto/pen/PowOvxM

cssoverflownavigationbar

Answer №1

The reason for the background not being visible is due to the float property in the li element causing the ul's height to collapse to 0 when its child has a float. To fix this, either remove the float from the li element or add a clearfix to the ul element. For more information on how to implement a clearfix, refer to additional resources.

Answer №2

The issue with the background color not displaying correctly is due to the fact that the ul element has a height of 0 because all of its children are floated using float: left. Floats can create unexpected layout issues and may not be immediately obvious. Resolving these issues by applying a 'clearfix' method to the parent of the floated elements can be quite complex.

Moreover, the reason why setting overflow: hidden seems to resolve the problem is because it establishes a new block formatting context, thereby bypassing the float problem without truly fixing it.

Using float: left; on your li elements may not be necessary. Utilizing inline-block could be a better alternative for a simple list of links. It's worth noting that inline-block elements often have slight whitespace between them, potentially caused by line breaks in the HTML source code. This could be a key reason why inline block may not always be the ideal solution.

However, if you prefer to stick with your current setup, adding the following clearfix snippet to your CSS should help resolve the issue:

ul::after {
  content: "";
  display: table;
  clear: both;
}

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