Скачать или смотреть Solving the Issue of box-shadow Being Cut Off in Absolute Position Flex Containers

Discover how to effectively apply `box-shadow` in absolute positioned flexbox layouts to ensure it is displayed correctly, even with overlapping elements.
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This video is based on the question https://stackoverflow.com/q/73718109/ asked by the user 'user19995252' ( https://stackoverflow.com/u/19995252/ ) and on the answer https://stackoverflow.com/a/73718312/ provided by the user 'G-Cyrillus' ( https://stackoverflow.com/u/2442099/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Introduction

When designing web layouts, you might encounter a frustrating issue where the box-shadow of flex items within an absolutely positioned flex container gets cut off. This problem often arises when you're attempting to create visually interesting designs, such as displaying a set of playing cards overlapping each other. In this guide, we’ll delve into the causes of this issue and provide a straightforward solution.

The Problem

A common scenario that developers face is when the box-shadow seems to be truncated due to the overflow of content in a flex container. This situation usually arises when:

You position the flex container absolutely.

Flex items have negative margins.

In the example presented, the layout aimed to display overlapping playing cards. However, due to the structure and positioning, the desired shadow effects were not rendering as expected.

Understanding the Solution

The key to resolving this issue lies in using the filter property instead of relying solely on box-shadow. Let's break down the solution step-by-step:

1. Recognize the Overflow Issue

The overflowing cards are pushing the shadow outside of the visible area, which causes the shadow to be clipped. To address this, we need to adopt an alternative method to create shadows.

2. Use filter: drop-shadow

Instead of using box-shadow, which is restricted to the dimensions of its container, filter: drop-shadow(...) is capable of drawing a shadow that follows the visible content of the container. This means even if the content overflows, the shadow will still be rendered appropriately.

Example Code

Here's how you can implement filter: drop-shadow to achieve the desired effect:

[[See Video to Reveal this Text or Code Snippet]]

HTML Structure

Make sure to maintain the HTML structure as follows, as it forms the basis for the flex container:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

By switching from box-shadow to filter: drop-shadow, you can ensure that your shadows render effectively even in complex flexbox layouts. This approach respects the visible content, allowing for more flexible design choices without losing the intended visual effect.

Feel free to experiment with the parameters of drop-shadow to achieve the exact look you desire for your project. Happy coding!