CSS Environment Variables env()

- UNOFF

Usage of environment variables like safe-area-inset-top.

IE

  1. 5.5 - 10: Not supported
  2. 11: Not supported

Edge

  1. 12 - 18: Not supported
  2. 79: Supported
  3. 80: Supported

Firefox

  1. 2 - 64: Not supported
  2. 65 - 73: Supported
  3. 74: Supported
  4. 75 - 76: Supported

Chrome

  1. 4 - 68: Not supported
  2. 69 - 79: Supported
  3. 80: Supported
  4. 81 - 83: Supported

Safari

  1. 3.1 - 10.1: Not supported
  2. 11: Partial support
  3. 11.1 - 12.1: Supported
  4. 13: Supported
  5. 13.1 - TP: Supported

Opera

  1. 9 - 55: Not supported
  2. 56 - 65: Supported
  3. 66: Supported

iOS Safari

  1. 3.2 - 10.3: Not supported
  2. 11: Partial support
  3. 11.3 - 13.2: Supported
  4. 13.3: Supported
  5. 13.4: Supported

Opera Mini

  1. all: Not supported

Android Browser

  1. 2.1 - 4.4.4: Not supported
  2. 80: Supported

Blackberry Browser

  1. 7: Not supported
  2. 10: Not supported

Opera Mobile

  1. 10 - 12.1: Not supported
  2. 46: Not supported

Chrome for Android

  1. 80: Supported

Firefox for Android

  1. 68: Supported

IE Mobile

  1. 10: Not supported
  2. 11: Not supported

UC Browser for Android

  1. 12.12: Not supported

Samsung Internet

  1. 4 - 9.2: Not supported
  2. 10.1: Supported
  3. 11.1: Supported

QQ Browser

  1. 1.2: Not supported

Baidu Browser

  1. 7.12: Not supported

KaiOS Browser

  1. 2.5: Not supported
Resources:
The env() CSS Function - MDN Web Docs
JSFiddle test case
Designing Websites for iPhone X - WebKit Blog
Microsoft Edge feature suggestion