microsoft / microsoft/vscode-custom-data

CSS: Unknown property: 'corner-shape'

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Dominant language
JavaScript
Stars
240
Forks
95
PR merge metrics
No merged PRs in 30d

Description

Does this issue occur when all extensions are disabled?: Yes

VS Code Version: 1.109.5
OS Version: MacOS Tahoe 26.2 (25C56)

[!NOTE]
Version : 1.109.5
Commit : 072586267e68ece9a47aa43f8c108e0dcbf44622
Date : 2026-02-19T19:43:32.382Z (Il y a 1 semaine)
Navigateur : Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/145.0.0.0 > Safari/537.36

Steps to Reproduce:
  1. Create a .css file
  2. Use: corner-shape
  3. See that corner-shape is not recognized.
Image

According to MDN Chrome, Edge, and Opera already support it since some versions,

Firefox and Safari do not support it right now, I still find it pretty useful :)

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by locating the custom CSS property data used by this repository and compare its handling with the reported .css reproduction. Add corner-shape so it is recognized, then verify the result in VS Code using the reported example.

Written by the indexing model from the issue text.

Assessment

Tech stack
css
Domain
tooling
Issue type
Bug
Difficulty
2/5
Estimated time
1-3 hours
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
45/100

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