Web Platform Baseline Status Breakdown
Total Features: 1219
Categories:
All
CSS (6)
Text (4)
Units (4)
Workers (3)
Color types (2)
Container queries (2)
JavaScript (2)
JavaScript modules (2)
Reporting (2)
Selectors (2)
Streams (2)
WebAssembly (2)
Animation (1)
Clipping, shapes, and masking (1)
Explicit defaults (1)
HTML (1)
Image scaling (1)
Internationalization (1)
Iterators (1)
Maps (1)
MathML (1)
Scrolling (1)
Security (1)
View transitions (1)
2026
1 features
• March 2026
Newly Available
The Iterator.concat() JavaScript method returns an iterator that yields values from a sequence of iterators, exhausting each iterator before moving on to the next.
Chrome
146
Firefox
147
Safari
26.4
Edge
146
Baseline Date: Mar 24, 2026