Can I use
?

Shared Web Workers

- LS

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

Chrome

  1. 4 - 116: Supported
  2. 117: Supported
  3. 118 - 120: Supported

Edge

  1. 12 - 18: Not supported
  2. 79 - 116: Supported
  3. 117: Supported

Safari

  1. 3.1 - 4: Not supported
  2. 5 - 6: Supported
  3. 6.1 - 15.6: Not supported
  4. 16.0 - 16.5: Supported
  5. 16.6: Supported
  6. 17.0 - TP: Supported

Firefox

  1. 2 - 28: Not supported
  2. 29 - 116: Supported
  3. 117: Supported
  4. 118 - 120: Supported

Opera

  1. 9 - 10.5: Not supported
  2. 10.6 - 101: Supported
  3. 102: Supported

IE

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

Chrome for Android

  1. 117: Not supported

Safari on iOS

  1. 3.2 - 4.3: Not supported
  2. 5 - 6.1: Supported
  3. 7 - 15.7: Not supported
  4. 16.0 - 16.6: Supported
  5. 17.0: Supported
  6. 17.1: Supported

Samsung Internet

  1. 4: Supported
  2. 5 - 21: Not supported
  3. 22: Not supported

Opera Mini

  1. all: Not supported

Opera Mobile

  1. 10: Support unknown
  2. 11 - 12.1: Supported
  3. 73: Not supported

UC Browser for Android

  1. 15.5: Not supported

Android Browser

  1. 2.1 - 4.4.4: Not supported
  2. 117: Not supported

Firefox for Android

  1. 117: Supported

QQ Browser

  1. 13.1: Not supported

Baidu Browser

  1. 13.18: Not supported

KaiOS Browser

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