Web Platform Baseline Status Breakdown
Total Features: 1219
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)
2024
2 features
• December 2024
Newly Available
The ruby-align CSS property sets the spacing and alignment of ruby annotation text when it does not fill its available space.
Chrome
128
Firefox
38
Safari
18.2
Edge
128
Baseline Date: Dec 11, 2024
Newly Available
The ruby-position CSS property sets the position of a ruby annotation in relation to its base text. Annotations can display over, under, or interleaved with the base text.
Chrome
84
Firefox
38
Safari
18.2
Edge
84
Baseline Date: Dec 11, 2024
2015
1 featuresLimited Availability
2 features
• In Progress / Not Yet Baseline
Limited
The ruby-overhang CSS property sets whether ruby annotations may overlap adjacent text.
Chrome
151
Firefox
—
Safari
18.2
Edge
151
Status: Incomplete cross-engine support
Limited
The display: ruby CSS declaration renders an element with the box layout of a <ruby> HTML element. Child elements may use equivalents to <ruby> internal elements such as display: ruby-base for <rb>.
Chrome
—
Firefox
88
Safari
—
Edge
—
Status: Incomplete cross-engine support