v150 · CSS · Feature Detection · CSSOM
CSSOM Query
Use CSS.supports() to probe named-feature() from JavaScript — the programmatic equivalent of @supports named-feature(anchor-position-follows-transforms). Compare call forms, run batch probes, and generate ready-to-paste code.
CSS.supports() — interactive query builder
Select a call form, enter a condition, and press Evaluate:
Press Evaluate to run the probe.
// code will appear here
Quick presets:
| Query | CSS.supports() result | Call form |
|---|---|---|
| Press Evaluate above or use a preset to populate this table. | ||
see also
- Anchor-position Feature Flag — CSS @supports version
- Feature Query Explorer — all @supports types evaluated
- Compound Condition — and/or/not in a query builder
- ChromeStatus entry
- CSS Conditional Level 5 named-feature() syntax
implementation reference
Need the exact API surface, compatibility boundaries, errors, lifecycle, and source links? Read the matching gendn reference ↗