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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 - 105: Supported
  2. 106: Supported
  3. 107 - 109: Supported

Edge

  1. 12 - 14: Partial support
  2. 15 - 104: Supported
  3. 105: Supported

Safari

  1. 3.1 - 15.6: Supported
  2. 16.0: Supported
  3. 16.1 - TP: Supported

Firefox

  1. 2 - 104: Supported
  2. 105: Supported
  3. 106 - 107: Supported

Opera

  1. 9 - 11.5: Partial support
  2. 11.6 - 12: Supported
  3. 12.1: Supported
  4. 15 - 90: Supported
  5. 91: 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. 105: Supported

Safari on iOS

  1. 3.2 - 15.6: Supported
  2. 16.0: Supported
  3. 16.1: Supported

Samsung Internet

  1. 4 - 17.0: Supported
  2. 18.0: Supported

Opera Mini

  1. all: Not supported

Opera Mobile

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

UC Browser for Android

  1. 13.4: Supported

Android Browser

  1. 2.1 - 4.4.4: Supported
  2. 105: Supported

Firefox for Android

  1. 104: Supported

QQ Browser

  1. 13.1: Supported

Baidu Browser

  1. 13.18: 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