HTML Imports

- WD

Deprecated method of including and reusing HTML documents in other HTML documents. Superseded by ES modules.

IE

  1. 5.5 - 9
  2. 10
  3. 11

Edge

  1. 12 - 18
  2. 79
  3. 80 - 81
  4. 83

Firefox

  1. 2 - 29
  2. 30 - 31
  3. 32 - 55
  4. 56 - 77
  5. 78
  6. 79 - 80

Chrome

  1. 4 - 29
  2. 30 - 34
  3. 35
  4. 36 - 79
  5. 80 - 81
  6. 83
  7. 84 - 86

Safari

  1. 3.1 - 5.1
  2. 6 - 13
  3. 13.1
  4. 14 - TP

Opera

  1. 9 - 16
  2. 17 - 21
  3. 22
  4. 23 - 66
  5. 67 - 68
  6. 69

iOS Safari

  1. 3.2 - 6.1
  2. 7 - 13.3
  3. 13.4
  4. 14.0

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 - 11.2
  2. 12.0

QQ Browser

  1. 10.4

Baidu Browser

  1. 7.12

KaiOS Browser

  1. 2.5
Resources:
IE Web Platform Status and Roadmap: HTML Imports
Firefox tracking bug: Implement HTML Imports
Chromium tracking bug: Implement HTML Imports
HTML5Rocks - HTML Imports: #include for the web
Polymer project (polyfill & web components framework)