CSS Variables (Custom Properties)

- CR

Permits the declaration and usage of cascading variables in stylesheets.

IE

  1. 5.5 - 10
  2. 11

Edge

  1. 12 - 14
  2. 15
  3. 16 - 81
  4. 83

Firefox

  1. 2 - 30
  2. 31 - 75
  3. 76
  4. 77 - 78

Chrome

  1. 4 - 47
  2. 48
  3. 49 - 81
  4. 83
  5. 84 - 86

Safari

  1. 3.1 - 9
  2. 9.1 - 13
  3. 13.1
  4. TP

Opera

  1. 9 - 34
  2. 35
  3. 36 - 67
  4. 68

iOS Safari

  1. 3.2 - 9.2
  2. 9.3 - 13.3
  3. 13.4

Opera Mini

  1. all

Android Browser

  1. 2.1 - 4.4.4
  2. 81

Blackberry Browser

  1. 7
  2. 10

Opera Mobile

  1. 10 - 12.1
  2. 46

Chrome for Android

  1. 81

Firefox for Android

  1. 68

IE Mobile

  1. 10
  2. 11

UC Browser for Android

  1. 12.12

Samsung Internet

  1. 4
  2. 5 - 10.1
  3. 11.1

QQ Browser

  1. 10.4

Baidu Browser

  1. 7.12

KaiOS Browser

  1. 2.5
Resources:
Edge Dev Blog post
MDN Web Docs - Using CSS variables
Polyfill for IE11
Mozilla hacks article (older syntax)