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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.

IE

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

Edge

  1. 12 - 14: Partial support
  2. 15 - 95: Supported
  3. 96: Supported

Firefox

  1. 2 - 93: Supported
  2. 94: Supported
  3. 95 - 96: Supported

Chrome

  1. 4 - 95: Supported
  2. 96: Supported
  3. 97 - 99: Supported

Safari

  1. 3.1 - 15: Supported
  2. 15.1: Supported
  3. TP: Supported

Opera

  1. 9 - 11.5: Partial support
  2. 11.6 - 12: Supported
  3. 12.1: Supported
  4. 15 - 80: Supported
  5. 81: Supported

Safari on iOS

  1. 3.2 - 14.8: Supported
  2. 15: Supported

Opera Mini

  1. all: Not supported

Android Browser

  1. 2.1 - 4.4.4: Supported
  2. 96: Supported

Opera Mobile

  1. 10 - 11.5: Partial support
  2. 12 - 12.1: Supported
  3. 64: Supported

Chrome for Android

  1. 96: Supported

Firefox for Android

  1. 94: Supported

UC Browser for Android

  1. 12.12: Supported

Samsung Internet

  1. 4 - 14.0: Supported
  2. 15.0: Supported

QQ Browser

  1. 10.4: Supported

Baidu Browser

  1. 7.12: Supported

KaiOS Browser

  1. 2.5: Supported

Firefox also supports the non-standard -moz-outline-radius property that acts similar to border-radius.

Resources:
MDN Web Docs - CSS outline
CSS Basic User Interface Module Level 3