Can I use
?

Shared Web Workers

- LS

Method of allowing multiple scripts to communicate with a single web worker.

Chrome

  1. 4 - 122: Supported
  2. 123: Supported
  3. 124 - 126: Supported

Edge

  1. 12 - 18: Not supported
  2. 79 - 122: Supported
  3. 123: Supported

Safari

  1. 3.1 - 4: Not supported
  2. 5 - 6: Supported
  3. 6.1 - 15.6: Not supported
  4. 16.0 - 17.3: Supported
  5. 17.4: Supported
  6. 17.5 - TP: Supported

Firefox

  1. 2 - 28: Not supported
  2. 29 - 123: Supported
  3. 124: Supported
  4. 125 - 127: Supported

Opera

  1. 9 - 10.5: Not supported
  2. 10.6 - 108: Supported
  3. 109: Supported

IE

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

Chrome for Android

  1. 123: Not supported

Safari on iOS

  1. 3.2 - 4.3: Not supported
  2. 5 - 6.1: Supported
  3. 7 - 15.8: Not supported
  4. 16.0 - 17.3: Supported
  5. 17.4: Supported
  6. 17.5: Supported

Samsung Internet

  1. 4: Supported
  2. 5 - 23: Not supported
  3. 24: Not supported

Opera Mini

  1. all: Not supported

Opera Mobile

  1. 10: Support unknown
  2. 11 - 12.1: Supported
  3. 80: Not supported

UC Browser for Android

  1. 15.5: Not supported

Android Browser

  1. 2.1 - 4.4.4: Not supported
  2. 123: Not supported

Firefox for Android

  1. 124: Supported

QQ Browser

  1. 14.9: Not supported

Baidu Browser

  1. 13.52: Not supported

KaiOS Browser

  1. 2.5: Supported
  2. 3: Supported
Resources:
Blog post
Sitepoint article