Shadow DOM (V1)

- WD

Method of establishing and maintaining functional boundaries between DOM trees and how these trees interact with each other within a document, thus enabling better functional encapsulation within the DOM & CSS.

IE

  1. 5.5 - 10
  2. 11

Edge

  1. 12 - 18
  2. 79 - 81
  3. 83

Firefox

  1. 2 - 57
  2. 58
  3. 59 - 62
  4. 63 - 75
  5. 76
  6. 77 - 78

Chrome

  1. 4 - 52
  2. 53 - 81
  3. 83
  4. 84 - 86

Safari

  1. 3.1 - 9.1
  2. 10 - 13
  3. 13.1
  4. TP

Opera

  1. 9 - 39
  2. 40 - 67
  3. 68

iOS Safari

  1. 3.2 - 9.3
  2. 10 - 13.3
  3. 13.4

Opera Mini

  1. all

Android Browser

  1. 2.1 - 4.4.4
  2. 81

Blackberry Browser

  1. 7
  2. 10

Opera Mobile

  1. 10 - 12.1
  2. 46

Chrome for Android

  1. 81

Firefox for Android

  1. 68

IE Mobile

  1. 10
  2. 11

UC Browser for Android

  1. 12.12

Samsung Internet

  1. 4
  2. 5
  3. 6.2 - 10.1
  4. 11.1

QQ Browser

  1. 10.4

Baidu Browser

  1. 7.12

KaiOS Browser

  1. 2.5
Resources:
Safari implementation bug
Firefox implementation bug
Google Developers - Shadow DOM v1: self-contained web components