JavaScript modules via script tag

- LS

Loading JavaScript module scripts (aka ES6 modules) using <script type="module"> Includes support for the nomodule attribute.

Chrome

  1. 4 - 59: Not supported
  2. 60: Disabled by default
  3. 61 - 103: Supported
  4. 104: Supported
  5. 105 - 107: Supported

Edge

  1. 12 - 14: Not supported
  2. 15: Disabled by default
  3. 16 - 18: Supported
  4. 79 - 103: Supported
  5. 104: Supported

Safari

  1. 3.1 - 10: Not supported
  2. 10.1: Partial support
  3. 11 - 15.5: Supported
  4. 15.6: Supported
  5. 16.0 - TP: Supported

Firefox

  1. 2 - 53: Not supported
  2. 54 - 59: Disabled by default
  3. 60 - 102: Supported
  4. 103: Supported
  5. 104 - 105: Supported

Opera

  1. 9 - 46: Not supported
  2. 47: Disabled by default
  3. 48 - 88: Supported
  4. 89: Supported
  5. 90: Supported

IE

  1. 5.5 - 10: Not supported
  2. 11: Not supported

Chrome for Android

  1. 104: Supported

Safari on iOS

  1. 3.2 - 10.2: Not supported
  2. 10.3: Partial support
  3. 11 - 15.4: Supported
  4. 15.5: Supported
  5. 16.0: Supported

Samsung Internet

  1. 4 - 7.4: Not supported
  2. 8.2 - 16.0: Supported
  3. 17.0: Supported

Opera Mini

  1. all: Not supported

Opera Mobile

  1. 10 - 12.1: Not supported
  2. 64: Supported

UC Browser for Android

  1. 12.12: Not supported

Android Browser

  1. 2.1 - 4.4.4: Not supported
  2. 104: Supported

Firefox for Android

  1. 101: Supported

QQ Browser

  1. 10.4: Supported

Baidu Browser

  1. 7.12: Not supported

KaiOS Browser

  1. 2.5: Not supported
Resources:
Blog post: Native ECMAScript modules - the first overview
MS Edge blog post
Firefox support bug
Will it double-fetch? Browser behavior with `module` / `nomodule` scripts
Mozilla hacks article
Blog post on using nomodule
Specification for nomodule attribute
Intro to ES6 modules
Counterpart ECMAScript specification for import/export syntax
Sub-features:
JavaScript modules: dynamic import()