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CSS outline properties

- CR

The CSS outline properties draw a border around an element that does not affect layout, making it ideal for highlighting. This covers the outline shorthand, as well as outline-width, outline-style, outline-color and outline-offset.

Chrome

  1. ✅ 4 - 135: Supported
  2. ✅ 136: Supported
  3. ✅ 137 - 139: Supported

Edge

  1. ◐ 12 - 14: Partial support
  2. ✅ 15 - 135: Supported
  3. ✅ 136: Supported

Safari

  1. ✅ 3.1 - 18.4: Supported
  2. ✅ 18.5: Supported
  3. ✅ TP: Supported

Firefox

  1. ✅ 2 - 137: Supported
  2. ✅ 138: Supported
  3. ✅ 139 - 141: Supported

Opera

  1. ◐ 9 - 11.5: Partial support
  2. ✅ 11.6 - 12: Supported
  3. ✅ 12.1: Supported
  4. ✅ 15 - 116: Supported
  5. ✅ 117: Supported

IE

  1. ❌ 5.5 - 7: Not supported
  2. ◐ 8: Partial support
  3. ◐ 9 - 10: Partial support
  4. ◐ 11: Partial support

Chrome for Android

  1. ✅ 136: Supported

Safari on iOS

  1. ✅ 3.2 - 18.4: Supported
  2. ✅ 18.5: Supported

Samsung Internet

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

Opera Mini

  1. ❌ all: Not supported

Opera Mobile

  1. ◐ 10 - 11.5: Partial support
  2. ✅ 12 - 12.1: Supported
  3. ✅ 80: Supported

UC Browser for Android

  1. ✅ 15.5: Supported

Android Browser

  1. ✅ 2.1 - 4.4.4: Supported
  2. ✅ 136: 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:
MDN Web Docs - CSS outline
CSS Basic User Interface Module Level 3