:optional CSS pseudo-class

- WD

Chrome

  1. 146
  2. 147
  3. 148
  4. 149
  5. 150
  6. 151
  7. 152

Edge

  1. 146
  2. 147
  3. 148
  4. 149

Safari

  1. 26.1
  2. 26.2
  3. 26.3
  4. 26.4
  5. 26.5
  6. TP

Firefox

  1. 148
  2. 149
  3. 150
  4. 151
  5. 152
  6. 153
  7. 154

Opera

  1. 125
  2. 126
  3. 127
  4. 131

IE

  1. 8
  2. 9
  3. 10
  4. 11

Chrome for Android

  1. 148

Safari on iOS

  1. 26.1
  2. 26.2
  3. 26.3
  4. 26.4
  5. 26.5

Samsung Internet

  1. 27
  2. 28
  3. 29
  4. 30

Opera Mini

  1. all

Opera Mobile

  1. 11.5
  2. 12
  3. 12.1
  4. 80

UC Browser for Android

  1. 15.5

Android Browser

  1. 4.2-4.3
  2. 4.4
  3. 4.4.3-4.4.4
  4. 148

Firefox for Android

  1. 150

QQ Browser

  1. 14.9

Baidu Browser

  1. 13.52

KaiOS Browser

  1. 2.5
  2. 3.0-3.1