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Web Platform Baseline Status Breakdown Total Features: 1219
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Categories: All CSS (102) HTML elements (100) Selectors (46) JavaScript (43) Forms (42)
WebGL extensions (37) Text (26) WebAssembly (22) Media queries (21) Scrolling (20) Fonts (19) Performance (19) Arrays (17) Layout (17) HTML (16) Progressive web app (15) Typed arrays (14) Units (14) Canvas (13) Color types (13) Strings (13) Background (12) Media elements (12) Security (12) Animation (11) Clipping, shapes, and masking (11) Web components (11) WebXR (11) Typographic font features (10) DOM (9) Internationalization (9) Iterators (9) Reporting (9) Text wrap (9) Workers (9) Clipboard (8) CSS object models (7) Containment (7) Fetch (7) JavaScript modules (7) Print media (7) Sensors (7) Container queries (6) Explicit defaults (6) Image formats (6) Landmark elements (6) Multi-column (6) Positioning (6) Promises (6) SVG (6) Storage (6) Streams (6) Credential management (5) Custom elements (5) Font synthesis (5) HTTP (5) Lists (5) Messaging (5) Resource hints (5) Ruby (5) Selection (5) Speech (5) Transitions (CSS) (5) View transitions (5) Web audio (5) WebGL (5) Anchor positioning (4) Cookies (4) Counters (4) File system access (4) Flexbox (4) Gamepad (4) Grid (4) Images (4) Primitive types (4) Regular expressions (4) WebDriver (4) WebRTC (4) Blend mode (3) Borders and outlines (3) Geolocation (3) Gradients (3) Image scaling (3) JSON (3) Maps (3) MathML (3) Payments (3) Reading order (3) Scroll markers (3) Transforms (3) WebAuthn (3) WebGPU (3) White space (3) Worklets (3) XML (3) Collections (2) Compute pressure (2) IndexedDB (2) Parsing and serialization (2) Resource integrity (2) Sets (2) Text fragments (2) WebMCP (2) CSS environment variables (1)
Years: All 2026 2023
Showing 6 of 6 features

2026

2 features
• May 2026

Container style queries with the @container at-rule apply styles to an element based on the values of custom properties of its container.

Chrome 111
Firefox 151
Safari 18
Edge 111
Baseline Date: May 19, 2026

Name-only container queries with the @container … at-rule apply styles to an element based on the name of the element's container alone.

Chrome 148
Firefox 149
Safari 26.4
Edge 148
Baseline Date: May 7, 2026

2023

1 features
• February 2023

Container size queries with the @container (…) at-rule apply styles to an element based on a dimension of its container, such as width or height.

Chrome 105
Firefox 110
Safari 16
Edge 105
Baseline Date: Feb 14, 2023

Limited Availability

3 features
• In Progress / Not Yet Baseline

Anchor position container queries with the @container anchored(fallback: …) at-rule apply styles to an element based on the element's anchor position.

Chrome 143
Firefox —
Safari —
Edge 143
Status: Incomplete cross-engine support

The @container style() CSS at-rule and if(style()) CSS function queries accept a range syntax, such as >, <, >=, <=, to query for inexact values.

Chrome 142
Firefox —
Safari —
Edge 142
Status: Incomplete cross-engine support

Container scroll-state queries with the @container scroll-state(...) at-rule apply styles to an element based on the sticky positioning, snapped, and scrollable state of the container.

Chrome 133
Firefox —
Safari —
Edge 133
Status: Incomplete cross-engine support