JavaScript built-in: Intl: Locale: getWeekInfo

IE

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

Edge

  1. 12 - 98: Not supported
  2. 99 - 129: Partial support
  3. 130: Supported
  4. 131: Supported

Firefox

  1. 2 - 132: Not supported
  2. 133: Not supported
  3. 134 - 136: Not supported

Chrome

  1. 4 - 98: Not supported
  2. 99 - 129: Partial support
  3. 130: Supported
  4. 131: Supported
  5. 132 - 134: Supported

Safari

  1. 3.1 - 16.6: Not supported
  2. 17.0 - 18.1: Supported
  3. 18.2: Supported
  4. 18.3 - TP: Supported

Opera

  1. 10 - 84: Not supported
  2. 85 - 113: Partial support
  3. 114: Partial support

Safari on iOS

  1. 3.2 - 15.3: Not supported
  2. 15.4 - 16.7: Partial support
  3. 17.0 - 18.1: Supported
  4. 18.2: Supported
  5. 18.3: Supported

Opera Mini

  1. all: Support unknown

Android Browser

  1. 2.1 - 4.4.4: Not supported
  2. 131: Supported

Opera Mobile

  1. 12 - 12.1: Not supported
  2. 80: Partial support

Chrome for Android

  1. 131: Supported

Firefox for Android

  1. 132: Not supported

UC Browser for Android

  1. 15.5: Support unknown

Samsung Internet

  1. 4 - 17.0: Not supported
  2. 18.0 - 26: Partial support
  3. 27: Partial support

QQ Browser

  1. 14.9: Support unknown

Baidu Browser

  1. 13.52: Support unknown

KaiOS Browser

  1. 2.5: Support unknown
  2. 3: Support unknown