Can I use
?

JavaScript classes: Public class fields

IE

  1. 6 - 10: Not supported
  2. 11: Not supported

Edge

  1. 12 - 18: Not supported
  2. 79 - 87: Supported
  3. 88: Supported

Firefox

  1. 2 - 68: Not supported
  2. 69 - 84: Supported
  3. 85: Supported
  4. 86 - 87: Supported

Chrome

  1. 4 - 71: Not supported
  2. 72 - 88: Supported
  3. 89: Supported
  4. 90 - 92: Supported

Safari

  1. 3.1 - 13.1: Not supported
  2. 14: Partial support
  3. TP: Partial support

Opera

  1. 10 - 58: Not supported
  2. 60 - 72: Supported
  3. 73: Supported

iOS Safari

  1. 3.2 - 13.7: Not supported
  2. 14: Partial support

Opera Mini

  1. all: Support unknown

Android Browser

  1. 2.1 - 4.4.4: Not supported
  2. 81: Supported

Opera Mobile

  1. 12 - 12.1: Not supported
  2. 59: Supported

Chrome for Android

  1. 88: Supported

Firefox for Android

  1. 85: Supported

UC Browser for Android

  1. 12.12: Support unknown

Samsung Internet

  1. 4 - 12.0: Not supported
  2. 13.0: Not supported

QQ Browser

  1. 10.4: Support unknown

Baidu Browser

  1. 7.12: Support unknown

KaiOS Browser

  1. 2.5: Support unknown