Test pages
Compatibility table
| Feature | Web browser support |
|---|---|
| Canvas |
|
| Custom data attributes |
|
| Custom data attributes - dataset property |
|
| File API |
|
| Geolocation |
|
| localStorage |
|
| sessionStorage |
|
| Offline Web Applications |
|
| Online/Offline events |
|
| Online polling |
|
| postMessage |
|
| Video |
Notable here is that the main concern is codecs. Firefox and Opera support Ogg Theora, Safari supports H.264 and Google Chrome supports both. |
| Web Workers |
|
3.0+
3.0+
1.0+
9.5+
all