Can I use
?

CSS selector: `:open`

IE

  1. ❌ 6 - 10: Not supported
  2. ❌ 11: Not supported

Edge

  1. ❌ 12 - 113: Not supported
  2. ◐ 114 - 121: Partial support
  3. ❌ 122 - 131: Not supported
  4. ❌ 132: Not supported

Firefox

  1. ❌ 2 - 133: Not supported
  2. ❌ 134: Not supported
  3. ❌ 135 - 137: Not supported

Chrome

  1. ❌ 4 - 113: Not supported
  2. ◐ 114 - 121: Partial support
  3. ❌ 122 - 131: Not supported
  4. ❌ 132: Not supported
  5. ✅ 133 - 135: Supported

Safari

  1. ❌ 3.1 - 18.1: Not supported
  2. ❌ 18.2: Not supported
  3. ❌ 18.3: Not supported
  4. ﹖ TP: Support unknown

Opera

  1. ❌ 10 - 99: Not supported
  2. ◐ 100 - 107: Partial support
  3. ❌ 108 - 113: Not supported
  4. ❌ 114: Not supported

Safari on iOS

  1. ❌ 3.2 - 18.1: Not supported
  2. ❌ 18.2: Not supported
  3. ❌ 18.3: Not supported

Opera Mini

  1. ﹖ all: Support unknown

Android Browser

  1. ❌ 2.1 - 4.4.4: Not supported
  2. ❌ 131: Not supported

Opera Mobile

  1. ❌ 12 - 12.1: Not supported
  2. ◐ 80: Partial support

Chrome for Android

  1. ❌ 131: Not supported

Firefox for Android

  1. ❌ 132: Not supported

UC Browser for Android

  1. ﹖ 15.5: Support unknown

Samsung Internet

  1. ❌ 4 - 22: Not supported
  2. ◐ 23 - 25: Partial support
  3. ❌ 26: Not supported
  4. ❌ 27: Not supported

QQ Browser

  1. ﹖ 14.9: Support unknown

Baidu Browser

  1. ﹖ 13.52: Support unknown

KaiOS Browser

  1. ﹖ 2.5: Support unknown
  2. ﹖ 3: Support unknown