The background-size: cover property should work with box-sizing: border-box as they are independent CSS properties that control different aspects of an element's rendering. However, there might be other CSS or HTML factors affecting the behavior, leading to the impression that background-size: cover is not working as expected.

Here are a few common issues that might be causing the problem:

  1. Incorrect CSS Selector: Make sure that you are applying background-size: cover to the correct CSS selector. If you apply it to the wrong selector or the element doesn't have the desired size, it might not appear as expected.

  2. Conflicting CSS Rules: Check if there are other CSS rules that might be overriding or conflicting with background-size: cover. In CSS, the order of rules matters, and more specific selectors or rules with higher specificity take precedence.

  3. HTML Structure: Ensure that the HTML structure is correct and that there are no parent elements affecting the size or positioning of the element with the background.

  4. Padding or Border: If the element has padding or borders applied, box-sizing: border-box will factor them into the element's total size. As a result, the background-size: cover behavior might not look as expected. Make sure to consider the padding and borders when setting the element's size.

Here's an example of how background-size: cover should work with box-sizing: border-box:


<div class="container"> <div class="content"> <!-- Your content here --> </div> </div>


.container { width: 300px; height: 200px; padding: 20px; box-sizing: border-box; background-image: url('your-image.jpg'); background-size: cover; background-repeat: no-repeat; background-position: center; } .content { /* Your content styles */ }

In this example, the .container div has a background image that covers the entire container, taking into account the padding due to the box-sizing: border-box property.

If you are still encountering issues, please double-check your CSS and HTML code to see if there are any conflicting rules or factors affecting the rendering of the element. If you can provide more specific code snippets or details about your layout, it would be easier to identify the cause of the problem.

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