Web Platform Baseline Status Breakdown
Total Features: 1198
Categories:
All
CSS (101)
HTML elements (100)
Selectors (46)
JavaScript (43)
Forms (42)
WebGL extensions (37)
WebAssembly (22)
Media queries (21)
Fonts (19)
Performance (19)
Text (19)
Scrolling (18)
Arrays (17)
Layout (17)
HTML (16)
Progressive web app (15)
Typed arrays (14)
Units (14)
Canvas (13)
Background (12)
Color types (12)
Media elements (12)
Strings (12)
Clipping, shapes, and masking (11)
Security (11)
Web components (11)
WebXR (11)
Typographic font features (10)
Animation (9)
DOM (9)
Internationalization (9)
Reporting (9)
Text wrap (9)
Workers (9)
Clipboard (8)
Containment (7)
Fetch (7)
JavaScript modules (7)
Print media (7)
Sensors (7)
CSS object models (6)
Image formats (6)
Iterators (6)
Landmark elements (6)
Positioning (6)
Promises (6)
SVG (6)
Storage (6)
Streams (6)
Container queries (5)
Credential management (5)
Custom elements (5)
Explicit defaults (5)
Font synthesis (5)
HTTP (5)
Messaging (5)
Multi-column (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)
Lists (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)
Limited Availability
4 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
Limited
Anchor positioning places an element based on the position of another element. For example, you can place a tooltip next to the content it references.
Chrome
—
Firefox
—
Safari
27
Edge
—
Status: Incomplete cross-engine support
The anchor() and anchor-size() CSS functions animate or transition on changes such as the anchor box moving or the anchor element changing.
Chrome
125
Firefox
—
Safari
26
Edge
125
Status: Incomplete cross-engine support
Anchor positioned elements take CSS transforms on their anchor elements into account.
Chrome
144
Firefox
—
Safari
—
Edge
144
Status: Incomplete cross-engine support