css container query support

[raythurnvoid]

Describe the bug

A warning is raised when using the container CSS property: Unknown property: 'container'

Reproduction

Use the "container" css property.

Expected behaviour

To not show a warning.

System Info

System:
OS: Windows 10 10.0.22621
CPU: (16) x64 AMD Ryzen 9 4900H with Radeon Graphics
Memory: 17.99 GB / 31.42 GB
Binaries:
Node: 18.14.0 - C:\Program Files\nodejs\node.EXE
npm: 9.3.1 - C:\Program Files\nodejs\npm.CMD
Browsers:
Edge: Spartan (44.22621.1265.0), Chromium (110.0.1587.49)
Internet Explorer: 11.0.22621.1
npmPackages:
@sveltejs/kit: ^1.7.2 => 1.7.2
@sveltejs/package: ^2.0.1 => 2.0.1
svelte: ^3.55.1 => 3.55.1
vite: ^4.1.2 => 4.1.2

Which package is the issue about?

Svelte for VS Code extension

Additional Information, eg. Screenshots

No response

[gtm-nayan]

@raythurnevoid Please check whether this issue also occurs in your editor in a plain .css file.

[raythurnvoid]

@raythurnevoid Please check whether this issue also occurs in your editor in a plain .css file.

It does, looks like a vscode CSS linter issue.
I've opened a new issue there: microsoft/vscode-css-languageservice#329

[jorri11]

I get a warning on this when running svelte-check, would that indicate it is not only an issue in vscode?