Web Platform Baseline Status Breakdown
Total Features: 1219
Categories:
All
CSS (35)
Progressive web app (15)
WebGL extensions (12)
Forms (11)
JavaScript (11)
Performance (11)
WebXR (11)
HTML elements (10)
Scrolling (10)
Selectors (10)
Layout (8)
HTML (7)
Media queries (7)
Reporting (7)
Text (7)
Media elements (6)
Sensors (6)
Canvas (5)
Clipboard (5)
Fonts (5)
Anchor positioning (4)
Animation (4)
CSS object models (4)
Credential management (4)
DOM (4)
Fetch (4)
Speech (4)
WebAssembly (4)
WebDriver (4)
Background (3)
Container queries (3)
Gamepad (3)
Images (3)
Iterators (3)
JavaScript modules (3)
Multi-column (3)
Payments (3)
Print media (3)
Scroll markers (3)
Selection (3)
Storage (3)
Streams (3)
Text wrap (3)
Typographic font features (3)
Web components (3)
WebGL (3)
WebGPU (3)
Clipping, shapes, and masking (2)
Color types (2)
Compute pressure (2)
Cookies (2)
Custom elements (2)
Flexbox (2)
Geolocation (2)
Image formats (2)
Lists (2)
Reading order (2)
Regular expressions (2)
Ruby (2)
SVG (2)
Security (2)
View transitions (2)
Web audio (2)
WebMCP (2)
Workers (2)
Worklets (2)
Counters (1)
File system access (1)
Font synthesis (1)
Grid (1)
Image scaling (1)
IndexedDB (1)
MathML (1)
Resource hints (1)
Resource integrity (1)
Strings (1)
Transitions (CSS) (1)
WebAuthn (1)
XML (1)
Years:
All
Limited Availability
4 features
• In Progress / Not Yet Baseline
Anchor positioned elements take CSS transforms on their anchor elements into account.
Chrome
144
Firefox
—
Safari
27
Edge
144
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
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 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