BASELINE NowYouCanUse.com
Web Platform Baseline Status Breakdown Total Features: 1191
Search: Reset ×
Categories: All CSS (101) HTML elements (98) Selectors (46) JavaScript (43) Forms (40)
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) Internationalization (9) Reporting (9) Text wrap (9) Clipboard (8) Workers (8) Containment (7) DOM (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) 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) Container queries (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) 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) Geolocation (2) IndexedDB (2) Parsing and serialization (2) Resource integrity (2) Sets (2) Text fragments (2) WebMCP (2) CSS environment variables (1)
Showing 5 of 5 features

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 features
• July 2015
Widely Available

The <ruby> element produces small annotations that are rendered with its base text.

Chrome 5
Firefox 38
Safari 5
Edge 12
Baseline Date: Jul 29, 2015

Limited Availability

2 features
• In Progress / Not Yet Baseline
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

The ruby-overhang CSS property sets whether ruby annotations may overlap adjacent text.

Chrome
Firefox
Safari 18.2
Edge
Status: Incomplete cross-engine support