# The CSS border-corner-shape proposal needs real-world use cases

DevFeed: [The CSS border-corner-shape proposal needs real-world use cases](<https://devfeed.tech/articles/border-corner-shape-is-in-danger-and-you-can-help-52063.md>)

Original publisher: [Read original article](<https://lea.verou.me/2013/03/border-corner-shape-is-in-danger-and-you-can-help/>)

Author: Lea Verou

Published: 2013-03-28T00:00:00Z

Content type: article

Language: en

Sources: [Lea Verou's blog](<https://devfeed.tech/sources/lea-verou-s-blog.md>)

Topics: [CSS](<https://devfeed.tech/topics/css.md>), [web-standards](<https://devfeed.tech/topics/web-standards.md>), [Web Development](<https://devfeed.tech/topics/web-development.md>)

Tags: [blog](<https://devfeed.tech/tags/blog.md>), [border-corner-shape](<https://devfeed.tech/tags/border-corner-shape.md>), [css](<https://devfeed.tech/tags/css.md>), [css-wg](<https://devfeed.tech/tags/css-wg.md>), [css4](<https://devfeed.tech/tags/css4.md>), [developers](<https://devfeed.tech/tags/developers.md>), [news](<https://devfeed.tech/tags/news.md>), [use-cases](<https://devfeed.tech/tags/use-cases.md>), [web-designers](<https://devfeed.tech/tags/web-designers.md>)

## AI overview

The article discusses a proposal to add border-corner-shape to CSS. It argues that the feature could simplify effects such as bevels, curves, notches, triangles, and other polygons, while asking the community to provide real-world examples and alternatives to help determine whether the proposal should be retained.

## Source excerpt

Remember my previous post about an app I made to preview border-corner-shape? It stirred a lot of discussion in the CSS WG, and David Baron posted this: http://dev.w3.org/csswg/css4-background/#border-corner-shape appears to me to be an example of a feature that's addressing a problem that we don't have - or at least that we don't have enough to be worth adding such a feature. I think it should be removed. In particular, if there were demand for the bevel | curve | notch values, we'd be seeing authors using the equivalents of such values on significant numbers of Web sites. So before agreeing to accept this new feature, I'd like to see examples of Web sites that are doing what these values would do. Not something similar to what these values would do, but exactly what these values would do, or at least close enough that the author wouldn't care about the difference. You can read the whole discussion in the thread I linked to, above. I might be wrong, but I believe border-corner-shape would greatly simplify many common effects, especially its "bevel" value, which can even create triangles and other polygons, that we go to great lengths to make with CSS today, and it would degrade much more nicely than border-image or backgrounds. I think it was one of fantasai's many great ideas and I'm glad she added it to the Editor's Draft of Backgrounds & Borders 4. I posted a list of tutorials and questions from web designers & developers, to illustrate that these effects are needed. However, David argued that "Questions from authors don't give you enough information to be sure that the feature being added is sufficient for the author's needs". He did have a point, so with some help from the community, I posted a few links to websites using such effects, and use cases. Nicole Sullivan, Liam Quin, fantasai and Lev Solntsev posted a couple more. However, the more real examples we have, the more likely it is to retain the feature in some form. This is where you come in: If you thin