Can I use
?

CSS :read-only and :read-write selectors

- LS

:read-only and :read-write pseudo-classes to match elements which are considered user-alterable

Chrome

  1. ﹖ 4 - 14: Support unknown
  2. ◐ 15 - 35: Partial support
  3. ✅ 36 - 156: Supported
  4. ✅ 157: Supported
  5. ✅ 158 - 160: Supported

Edge

  1. ❌ 12: Not supported
  2. ✅ 13 - 155: Supported
  3. ✅ 156: Supported

Safari

  1. ﹖ 3.1 - 3.2: Support unknown
  2. ◐ 4 - 8: Partial support
  3. ✅ 9 - 27.1: Supported
  4. ✅ 27.2: Supported
  5. ✅ 27.3 - TP: Supported

Firefox

  1. ﹖ 2: Support unknown
  2. ✅ 3 - 77: Supported
  3. ✅ 78 - 158: Supported
  4. ✅ 159: Supported
  5. ✅ 160 - 162: Supported

Opera

  1. ﹖ 9 - 11.1: Support unknown
  2. ◐ 11.5 - 22: Partial support
  3. ✅ 23 - 138: Supported
  4. ✅ 139: Supported

IE

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

Chrome for Android

  1. ✅ 157: Supported

Safari on iOS

  1. ﹖ 3.2 - 4.1: Support unknown
  2. ◐ 4.2 - 8.4: Partial support
  3. ✅ 9 - 26.6: Supported
  4. ✅ 27.0: Supported
  5. ✅ 27.1 - 27.2: Supported

Samsung Internet

  1. ✅ 4 - 30: Supported
  2. ✅ 31: Supported

Opera Mini

  1. ❌ all: Not supported

Opera Mobile

  1. ❌ 10 - 11.1: Not supported
  2. ◐ 11.5 - 12.1: Partial support
  3. ✅ 80: Supported

UC Browser for Android

  1. ✅ 15.5: Supported

Android Browser

  1. ﹖ 2.1 - 2.2: Support unknown
  2. ◐ 2.3 - 4.4.4: Partial support
  3. ✅ 157: Supported

Firefox for Android

  1. ✅ 159: Supported

QQ Browser

  1. ✅ 14.9: Supported

Baidu Browser

  1. ✅ 13.52: Supported

KaiOS Browser

  1. ✅ 2.5: Supported
  2. ✅ 3: Supported
Resources:
Firefox feature request bug
CSS Tricks article
MDN :read-only
MDN Web Docs - CSS :read-write
Selectors Level 4 § The Mutability Pseudo-classes: :read-only and :read-write