Can I use
?

requestIdleCallback

- WD

API allowing the execution of JavaScript to be queued to run in idle browser time, either at the end of a frame or when the user is inactive. Also covers support for cancelIdleCallback. The API has similarities with requestAnimationFrame.

IE

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

Edge

  1. 12 - 18: Not supported
  2. 79 - 91: Supported
  3. 92: Supported

Firefox

  1. 2 - 52: Not supported
  2. 53 - 54: Disabled by default
  3. 55 - 89: Supported
  4. 90: Supported
  5. 91 - 92: Supported

Chrome

  1. 4 - 46: Not supported
  2. 47 - 91: Supported
  3. 92: Supported
  4. 93 - 95: Supported

Safari

  1. 3.1 - 13: Not supported
  2. 13.1 - 14: Disabled by default
  3. 14.1: Disabled by default
  4. 15 - TP: Disabled by default

Opera

  1. 9 - 33: Not supported
  2. 34 - 76: Supported
  3. 77: Supported

Safari on iOS

  1. 3.2 - 13.3: Not supported
  2. 13.4 - 14.4: Disabled by default
  3. 14.5: Disabled by default

Opera Mini

  1. all: Not supported

Android Browser

  1. 2.1 - 4.4.4: Not supported
  2. 92: Supported

Opera Mobile

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

Chrome for Android

  1. 92: Supported

Firefox for Android

  1. 90: Supported

UC Browser for Android

  1. 12.12: Supported

Samsung Internet

  1. 4: Not supported
  2. 5 - 13.0: Supported
  3. 14.0: Supported

QQ Browser

  1. 10.4: Supported

Baidu Browser

  1. 7.12: Supported

KaiOS Browser

  1. 2.5: Not supported
Resources:
MDN Web Docs - requestIdleCallback
Google Developers article
Shim