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CSS initial value

- CR

A CSS value that will apply a property's initial value as defined in the CSS specification that defines the property

Chrome

  1. ✅ 4 - 134: Supported
  2. ✅ 135: Supported
  3. ✅ 136 - 138: Supported

Edge

  1. ✅ 12 - 134: Supported
  2. ✅ 135: Supported

Safari

  1. ﹖ 3.1: Support unknown
  2. ✅ 3.2 - 18.3: Supported
  3. ✅ 18.4: Supported
  4. ✅ 18.5 - TP: Supported

Firefox

  1. ◐ 2 - 3: Partial support
  2. ✅ 3.5 - 18: Supported
  3. ✅ 19 - 136: Supported
  4. ✅ 137: Supported
  5. ✅ 138 - 140: Supported

Opera

  1. ❌ 9 - 12.1: Not supported
  2. ✅ 15 - 116: Supported
  3. ✅ 117: Supported

IE

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

Chrome for Android

  1. ✅ 135: Supported

Safari on iOS

  1. ﹖ 3.2: Support unknown
  2. ✅ 4 - 18.3: Supported
  3. ✅ 18.4: Supported
  4. ✅ 18.5: Supported

Samsung Internet

  1. ✅ 4 - 26: Supported
  2. ✅ 27: Supported

Opera Mini

  1. ❌ all: Not supported

Opera Mobile

  1. ❌ 10 - 12.1: Not supported
  2. ✅ 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: Supported
  3. ✅ 135: Supported

Firefox for Android

  1. ✅ 137: Supported

QQ Browser

  1. ✅ 14.9: Supported

Baidu Browser

  1. ✅ 13.52: Supported

KaiOS Browser

  1. ✅ 2.5: Supported
  2. ✅ 3: Supported
Resources:
CSS Tricks article
MDN Web Docs - CSS initial