Can I use
?

Array.prototype.findIndex

- OTHER

The findIndex() method returns the index of the first element in the array that satisfies the provided testing function.

Chrome

  1. 4 - 44: Not supported
  2. 45 - 116: Supported
  3. 117: Supported
  4. 118 - 120: Supported

Edge

  1. 12 - 116: Supported
  2. 117: Supported

Safari

  1. 3.1 - 7: Not supported
  2. 7.1 - 16.6: Supported
  3. 17.0: Supported
  4. 17.1 - TP: Supported

Firefox

  1. 2 - 24: Not supported
  2. 25 - 116: Supported
  3. 117: Supported
  4. 118 - 120: Supported

Opera

  1. 9 - 31: Not supported
  2. 32 - 101: Supported
  3. 102: Supported

IE

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

Chrome for Android

  1. 117: Supported

Safari on iOS

  1. 3.2 - 7.1: Not supported
  2. 8 - 16.6: Supported
  3. 17.0: Supported
  4. 17.1: Supported

Samsung Internet

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

Opera Mini

  1. all: Not supported

Opera Mobile

  1. 10 - 12.1: Not supported
  2. 73: Supported

UC Browser for Android

  1. 15.5: Supported

Android Browser

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

Firefox for Android

  1. 117: Supported

QQ Browser

  1. 13.1: Supported

Baidu Browser

  1. 13.18: Supported

KaiOS Browser

  1. 2.5: Supported
  2. 3: Supported
Resources:
MDN article
Polyfill for this feature is available in the core-js library