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@property support <string> syntax

Category

CSS

Type

New or changed feature

Status

Enabled by default (Chrome 131)

Intent stage

None

• Breaking change: No
• Enterprise impact: None
• Spec maturity: Working draft
• Web Platform Tests: Yes

WPT details: wpt/css/css-properties-values-api/at-property.html wpt/css/css-properties-values-api/register-property-syntax-parsing.html

Summary

Support for "<string>" syntax component name for registered custom properties.

Motivation

Allows users to use <string> syntax support for registered custom properties.

Standards & signals

• Specification: https://drafts.css-houdini.org/css-properties-values-api-1/#supported-names
• Firefox: Shipped/Shipping
• Safari: Shipped/Shipping
• Web developers: No signals
• Tracking bug: https://g-issues.chromium.org/issues/357751736

Ecosystem

• Web Platform Tests: https://wpt.fyi/results/?q=wpt%2Fcss%2Fcss-properties-values-api%2Fat-property
• Chrome Platform Showcase: https://chrome-platform-showcase.paulkinlan-ea.deno.net/features
• GenDN reference: https://gendn.paulkinlan-ea.deno.net/features
• chrome.dev demos search: https://www.google.com/search?q=site%3Achrome.dev+%40property%20support%20%3Cstring%3E%20syntax
• MDN Web Docs: https://developer.mozilla.org/en-US/search?q=%40property%20support%20%3Cstring%3E%20syntax
• Baseline status: https://webstatus.dev/?q=%40property%20support%20%3Cstring%3E%20syntax

View on chromestatus.com