Can I use
?

Web Workers

- LS

Method of running scripts in the background, isolated from the web page

Chrome

  1. 4 - 109: Supported
  2. 110: Supported
  3. 111 - 113: Supported

Edge

  1. 12 - 108: Supported
  2. 109: Supported

Safari

  1. 3.1 - 3.2: Not supported (but has polyfill available)
  2. 4 - 16.2: Supported
  3. 16.3: Supported
  4. TP: Supported

Firefox

  1. 2 - 3: Not supported (but has polyfill available)
  2. 3.5 - 108: Supported
  3. 109: Supported
  4. 110 - 111: Supported

Opera

  1. 9 - 9.6: Not supported
  2. 10 - 10.5: Not supported (but has polyfill available)
  3. 10.6 - 93: Supported
  4. 94: Supported

IE

  1. 5.5: Not supported
  2. 6 - 9: Not supported (but has polyfill available)
  3. 10: Supported
  4. 11: Supported

Chrome for Android

  1. 109: Supported

Safari on iOS

  1. 3.2 - 4.3: Not supported
  2. 5 - 16.2: Supported
  3. 16.3: Supported

Samsung Internet

  1. 4 - 18.0: Supported
  2. 19.0: Supported

Opera Mini

  1. all: Not supported

Opera Mobile

  1. 10: Not supported (but has polyfill available)
  2. 11 - 12.1: Supported
  3. 73: Supported

UC Browser for Android

  1. 13.4: Supported

Android Browser

  1. 2.1: Supported
  2. 2.2 - 4.3: Not supported
  3. 4.4 - 4.4.4: Supported
  4. 109: Supported

Firefox for Android

  1. 109: Supported

QQ Browser

  1. 13.1: Supported

Baidu Browser

  1. 13.18: Supported

KaiOS Browser

  1. 2.5: Supported
Resources:
Polyfill for IE (single threaded)
Tutorial
MDN Web Docs - Using Web Workers
Web Worker demo
Sub-features:
Shared Web Workers