Web Platform Baseline Status Breakdown
Total Features: 1191
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)
2026
5 features
• September 2026
Newly Available
The progress() CSS function returns a ratio for the relative position of one value between two other values, clamped between 0 and 1. You can use it to interpolate a value for other calculations.
Chrome
138
Firefox
155
Safari
26
Edge
138
Baseline Date: Sep 1, 2026
• August 2026
Newly Available
The sibling-count() and sibling-index() CSS functions return integers that are useful to style elements based on their positions among siblings or on the number of siblings, for example as part of a calc() expression.
Chrome
138
Firefox
154
Safari
26.2
Edge
138
Baseline Date: Aug 18, 2026
• June 2026
Newly Available
The field-sizing CSS property allows form controls such as <textarea> to be sized based on their content.
Chrome
123
Firefox
152
Safari
26.2
Edge
123
Baseline Date: Jun 16, 2026
• March 2026
The @scope CSS at-rule sets the scope for a group of rules.
Chrome
143
Firefox
146
Safari
26.4
Edge
143
Baseline Date: Mar 24, 2026
Newly Available
The font-family: math CSS declaration uses the browser default font face for displaying mathematical expressions.
Chrome
109
Firefox
149
Safari
26.2
Edge
109
Baseline Date: Mar 24, 2026