CSS Device Adaptation
- WDMethod of overriding the size of viewport in web page using the @viewport rule, replacing Apple's own popular <meta> viewport implementation. Includes the extend-to-zoom width value.
Chrome
- ❌ 4 - 28: Not supported
- ❌ 29 - 135: Disabled by default
- ❌ 136: Disabled by default
- ❌ 137 - 139: Disabled by default
Edge
- ◐ 12 - 18: Partial support
- ❌ 79 - 135: Disabled by default
- ❌ 136: Disabled by default
Safari
- ❌ 3.1 - 18.4: Not supported
- ❌ 18.5: Not supported
- ❌ TP: Not supported
Firefox
- ❌ 2 - 137: Not supported
- ❌ 138: Not supported
- ❌ 139 - 141: Not supported
Opera
- ❌ 9 - 39: Not supported
- ❌ 40 - 116: Disabled by default
- ❌ 117: Disabled by default
IE
- ❌ 5.5 - 9: Not supported
- ◐ 10: Partial support
- ◐ 11: Partial support
Chrome for Android
- ❌ 136: Not supported
Safari on iOS
- ❌ 3.2 - 18.4: Not supported
- ❌ 18.5: Not supported
Samsung Internet
- ❌ 4 - 26: Not supported
- ❌ 27: Not supported
Opera Mini
- ◐ all: Partial support
Opera Mobile
- ❌ 10: Not supported
- ◐ 11 - 12.1: Partial support
- ❌ 80: Not supported
UC Browser for Android
- ❌ 15.5: Not supported
Android Browser
- ❌ 2.1 - 4.4.4: Not supported
- ❌ 136: Not supported
Firefox for Android
- ❌ 137: Not supported
QQ Browser
- ❌ 14.9: Disabled by default
Baidu Browser
- ❌ 13.52: Not supported
KaiOS Browser
- ❌ 2.5: Not supported
- ❌ 3: Not supported
Due to lack of implementation this specification is slated to be retired.