Web Platform Baseline Status Breakdown
Total Features: 1219
Categories:
All
CSS (15)
Scrolling (6)
WebAssembly (6)
JavaScript (5)
Text (5)
Units (4)
Selectors (3)
View transitions (3)
Workers (3)
Clipboard (2)
Color types (2)
Container queries (2)
HTML (2)
HTML elements (2)
Internationalization (2)
Iterators (2)
JSON (2)
JavaScript modules (2)
Performance (2)
Print media (2)
Reporting (2)
Resource hints (2)
Ruby (2)
Streams (2)
Text fragments (2)
Text wrap (2)
Typed arrays (2)
Animation (1)
Canvas (1)
Clipping, shapes, and masking (1)
Cookies (1)
Custom elements (1)
DOM (1)
Explicit defaults (1)
Fetch (1)
File system access (1)
Fonts (1)
Forms (1)
Gradients (1)
HTTP (1)
Image scaling (1)
Layout (1)
Maps (1)
MathML (1)
Media elements (1)
Promises (1)
Regular expressions (1)
Security (1)
Selection (1)
Sets (1)
Transitions (CSS) (1)
Web components (1)
WebGL (1)
WebGL extensions (1)
WebRTC (1)
2026
2 features
• September 2026
Newly Available
The JavaScript promise integration (JSPI) suspends a WebAssembly module when it calls a JavaScript method that returns a promise. The module resumes when the promise is resolved. You can use this to call asynchronous Web APIs from synchronous WebAssembly.
Chrome
137
Firefox
153
Safari
27
Edge
137
Baseline Date: Sep 14, 2026
• February 2026
Newly Available
Branch hints in WebAssembly allows a browser to optimize performance when a branch is a likely to take a specific path.
Chrome
137
Firefox
148
Safari
16
Edge
137
Baseline Date: Feb 24, 2026
2025
1 features
• May 2025
Newly Available
When caught, an exception is reified into an exception reference, a value of the new type exnref.
Chrome
137
Firefox
131
Safari
18.4
Edge
137
Baseline Date: May 29, 2025
2024
3 features
• December 2024
Newly Available
Garbage collection tracks references for better memory management with garbage-collected languages running in WebAssmbly.
Chrome
119
Firefox
120
Safari
18.2
Edge
119
Baseline Date: Dec 11, 2024
Newly Available
Tail call optimization discards a caller frame and replaces the call with a jump instruction.
Chrome
112
Firefox
121
Safari
18.2
Edge
112
Baseline Date: Dec 11, 2024
• September 2024
Newly Available
A typed function reference can be called directly.
Chrome
119
Firefox
120
Safari
18
Edge
119
Baseline Date: Sep 16, 2024