XMLHttpRequest advanced features
- LSUpdated functionality to the original XHR specification including things like file uploads, transfer progress information and the ability to send FormData. Previously known as XMLHttpRequest Level 2, these features now appear simply in the XMLHttpRequest spec.
Chrome
- 4 - 6: Support unknown
- 7 - 28: Partial support
- 29 - 30: Partial support
- 31 - 49: Partial support
- 50 - 123: Supported
- 124: Supported
- 125 - 127: Supported
Edge
- 12 - 18: Partial support
- 79 - 122: Supported
- 123: Supported
Safari
- 3.1 - 4: Not supported
- 5 - 6: Partial support
- 6.1 - 7: Partial support
- 7.1 - 11: Partial support
- 11.1 - 17.3: Supported
- 17.4: Supported
- 17.5 - TP: Supported
Firefox
- 2 - 3: Not supported
- 3.5 - 5: Partial support
- 6 - 9: Partial support
- 10 - 11: Partial support
- 12 - 46: Partial support
- 47 - 124: Supported
- 125: Supported
- 126 - 128: Supported
Opera
- 9 - 11.6: Not supported
- 12 - 12.1: Partial support
- 15 - 17: Partial support
- 18 - 36: Partial support
- 37 - 108: Supported
- 109: Supported
IE
- 5.5 - 9: Not supported
- 10: Partial support
- 11: Partial support
Chrome for Android
- 123: Supported
Safari on iOS
- 3.2 - 4.3: Not supported
- 5 - 6.1: Partial support
- 7: Partial support
- 8 - 10.3: Partial support
- 11 - 17.3: Supported
- 17.4: Supported
- 17.5: Supported
Samsung Internet
- 4: Partial support
- 5 - 23: Supported
- 24: Supported
Opera Mini
- all: Not supported
Opera Mobile
- 10 - 11.5: Not supported
- 12 - 12.1: Partial support
- 80: Supported
UC Browser for Android
- 15.5: Supported
Android Browser
- 2.1 - 2.3: Not supported
- 3 - 4.3: Partial support
- 4.4: Partial support
- 4.4.3: Partial support
- 123: Supported
Firefox for Android
- 124: Supported
QQ Browser
- 14.9: Supported
Baidu Browser
- 13.52: Supported
KaiOS Browser
- 2.5: Supported
- 3: Supported
See also support for the FormData API and its sub-features, which received more updates since the original XHR Level 2 specification was released.