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CSS Custom Functions

Category

CSS

Type

New or changed feature

Status

In developer trial (Behind a flag) (Chrome 139)

Intent stage

None

Summary

Custom Functions are similar to custom properties, but instead of returning a single, fixed value, they return values based on other custom properties, parameters, and conditionals.

Standards & signals

• Specification: https://drafts.csswg.org/css-mixins-1/#defining-custom-functions
• Firefox: No signal
• Safari: No signal
• Web developers: Positive
• Tracking bug: https://issues.chromium.org/issues/325504770

Explainers: https://css.oddbird.net/sasslike/mixins-functions

View on chromestatus.com