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
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
2025
1 features
• March 2025
Newly Available
The Iterator object is an abstract base for objects that implement the iterator protocol. It provides methods common to built-in iterators, such as filter(), find(), map(), and reduce(). You can also use the static method Iterator.from() to convert an existing iterable into an Iterator.
Chrome
122
Firefox
131
Safari
18.4
Edge
122
Baseline Date: Mar 31, 2025