microsoft / microsoft/vscode-custom-data
`scroll-marker-group` CSS property flagged as 'Unknown property'
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@aeschli is already working on this.
Since Jun 19, 2025.
feature-request
- Dominant language
- JavaScript
- Stars
- 240
- Forks
- 95
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Description
Does this issue occur when all extensions are disabled?: Yes
- VS Code Version: 1.101.0 (Universal)
- OS Version: macOS Sequoia Version 15.5
Steps to Reproduce:
- Disable all VSCode extensions. This bug is not related to extensions.
- Create a .css file.
- Try to apply the
scroll-marker-groupproperty to an element. For example:
ul {scroll-marker-group: after;} - Note the blue squiggly highlighting and VSCode error
Unknown property: 'scroll-marker-group' css(unknownProperties) scroll-marker-groupis indeed a valid property. Thescroll-marker-groupproperty is used to control whether a scroll container has a::scroll-marker-grouppseudo-element generated. This bug was identified while following the MDN tutorial for creating a CSS carousel.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
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- Open a pull request that references the issue number.
Assessment
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