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)
2015
4 features
• September 2015
Widely Available
A Symbol value is a unique, non-enumerable primitive value used for encapsulation or information hiding. For example, a symbol can be a key of an object that can never collide with any other key.
Chrome
38
Firefox
36
Safari
9
Edge
12
Baseline Date: Sep 30, 2015
• July 2015
Widely Available
The string type (and String object) represents a sequence of characters.
Chrome
1
Firefox
1
Safari
1
Edge
12
Baseline Date: Jul 29, 2015
Widely Available
The Date object represents a single moment in time.
Chrome
1
Firefox
1
Safari
1
Edge
12
Baseline Date: Jul 29, 2015
Widely Available
The number type (and Number object) represents floating-point numbers, such as 42 or -4.201, while the Math API contains mathematical functions and constants. JavaScript can also represent boundless negative and positive values as Infinity or not-a-number as NaN (as in 0 * Infinity).
Chrome
1
Firefox
1
Safari
1
Edge
12
Baseline Date: Jul 29, 2015