Web Platform Baseline Status Breakdown
Total Features: 1219
Categories:
All
HTML elements (88)
CSS (52)
Selectors (33)
Forms (30)
JavaScript (27)
WebGL extensions (24)
Arrays (17)
Media queries (14)
Text (14)
Fonts (13)
Strings (12)
Typed arrays (12)
WebAssembly (12)
Units (10)
Background (9)
Color types (9)
Security (9)
Clipping, shapes, and masking (8)
Layout (8)
Canvas (7)
Containment (7)
HTML (7)
Internationalization (7)
Typographic font features (7)
Web components (7)
Animation (6)
Landmark elements (6)
Performance (6)
Positioning (6)
Explicit defaults (5)
Media elements (5)
Messaging (5)
Promises (5)
DOM (4)
Font synthesis (4)
HTTP (4)
Image formats (4)
Iterators (4)
Primitive types (4)
SVG (4)
Scrolling (4)
Text wrap (4)
Workers (4)
Blend mode (3)
Borders and outlines (3)
CSS object models (3)
Counters (3)
Grid (3)
Lists (3)
Multi-column (3)
Storage (3)
Transforms (3)
Transitions (CSS) (3)
Web audio (3)
WebRTC (3)
White space (3)
Collections (2)
Custom elements (2)
Fetch (2)
File system access (2)
Flexbox (2)
Gradients (2)
JavaScript modules (2)
Maps (2)
Parsing and serialization (2)
Print media (2)
Resource hints (2)
WebAuthn (2)
XML (2)
CSS environment variables (1)
Clipboard (1)
Container queries (1)
Cookies (1)
Credential management (1)
Gamepad (1)
Geolocation (1)
Image scaling (1)
Images (1)
IndexedDB (1)
JSON (1)
MathML (1)
Reading order (1)
Regular expressions (1)
Resource integrity (1)
Ruby (1)
Selection (1)
Sensors (1)
Sets (1)
Speech (1)
Streams (1)
WebGL (1)
Worklets (1)
2023
3 features
• December 2023
• November 2023
The rlh CSS length unit is a font-relative length relative to the line height of root element.
Chrome
111
Firefox
120
Safari
16.4
Edge
111
Baseline Date: Nov 21, 2023
2022
1 features2020
1 features2017
1 features
• October 2017
Widely Available
The vw, vh, vmin, and vmax CSS viewport units are relative to the size of the viewport, and are used to size elements in relation to the viewport's dimensions.
Chrome
26
Firefox
19
Safari
7
Edge
16
Baseline Date: Oct 17, 2017
2015
4 features
• July 2015
The ch CSS length unit is a font-relative length based on the width of the zero (0) character.
Chrome
27
Firefox
1
Safari
7
Edge
12
Baseline Date: Jul 29, 2015
The em CSS length unit is a font-relative length equal to the specified font size. In an element with a 2 inch font, 1em equals 2 inches.
Chrome
1
Firefox
1
Safari
1
Edge
12
Baseline Date: Jul 29, 2015
The ex CSS length unit is a font-relative length equal to the used x-height of the first available font. X-height is often equal to the height of the lowercase x.
Chrome
1
Firefox
1
Safari
1
Edge
12
Baseline Date: Jul 29, 2015