CSS @apply rule

- UNOFF

Allows a set of CSS properties to be applied using a named variable

IE

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

Edge

  1. 12 - 18: Not supported
  2. 79 - 84: Disabled by default
  3. 85: Disabled by default

Firefox

  1. 2 - 79: Not supported
  2. 80: Not supported
  3. 81 - 82: Not supported

Chrome

  1. 4 - 50: Not supported
  2. 51 - 84: Disabled by default
  3. 85: Disabled by default
  4. 86 - 88: Disabled by default

Safari

  1. 3.1 - 13.1: Not supported
  2. 14: Not supported
  3. TP: Not supported

Opera

  1. 9 - 37: Not supported
  2. 38 - 69: Disabled by default
  3. 70: Disabled by default

iOS Safari

  1. 3.2 - 13.7: Not supported
  2. 14.0: Not supported

Opera Mini

  1. all: Not supported

Android Browser

  1. 2.1 - 4.4.4: Not supported
  2. 81: Not supported

Blackberry Browser

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

Opera Mobile

  1. 10 - 12.1: Not supported
  2. 46: Disabled by default

Chrome for Android

  1. 85: Disabled by default

Firefox for Android

  1. 79: Not supported

IE Mobile

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

UC Browser for Android

  1. 12.12: Not supported

Samsung Internet

  1. 4: Not supported
  2. 5 - 11.2: Disabled by default
  3. 12.0: Disabled by default

QQ Browser

  1. 10.4: Not supported

Baidu Browser

  1. 7.12: Disabled by default

KaiOS Browser

  1. 2.5: Not supported

See also support for CSS Variables

Resources:
Article on CSS @apply