Can I use
?

getElementsByClassName

- LS

Method of accessing DOM elements by class name

Chrome

  1. 4 - 117: Supported
  2. 118: Supported
  3. 119 - 121: Supported

Edge

  1. 12 - 117: Supported
  2. 118: Supported

Safari

  1. 3.1 - 16.6: Supported
  2. 17.0: Supported
  3. 17.1 - TP: Supported

Firefox

  1. 2: Not supported (but has polyfill available)
  2. 3 - 117: Supported
  3. 118: Supported
  4. 119 - 121: Supported

Opera

  1. 9: Not supported
  2. 9.5 - 102: Supported
  3. 103: Supported

IE

  1. 5.5: Not supported
  2. 6 - 8: Not supported (but has polyfill available)
  3. 9 - 10: Supported
  4. 11: Supported

Chrome for Android

  1. 117: Supported

Safari on iOS

  1. 3.2 - 16.6: Supported
  2. 17.0: Supported
  3. 17.1: Supported

Samsung Internet

  1. 4 - 21: Supported
  2. 22: Supported

Opera Mini

  1. all: Supported

Opera Mobile

  1. 10 - 12.1: Supported
  2. 73: Supported

UC Browser for Android

  1. 15.5: Supported

Android Browser

  1. 2.1 - 4.4.4: Supported
  2. 117: Supported

Firefox for Android

  1. 118: Supported

QQ Browser

  1. 13.1: Supported

Baidu Browser

  1. 13.18: Supported

KaiOS Browser

  1. 2.5: Supported
  2. 3: Supported
Resources:
getElementsByClassName on MDN
Test page