Can I use
?

Geolocation

- REC

Method of informing a website of the user's geographical location

IE

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

Edge

  1. 12 - 18: Supported
  2. 79 - 85: Supported
  3. 86: Supported

Firefox

  1. 2 - 3: Not supported (but has polyfill available)
  2. 3.5 - 54: Supported
  3. 55 - 80: Supported
  4. 81: Supported
  5. 82 - 83: Supported

Chrome

  1. 4: Partial support
  2. 5 - 49: Supported
  3. 50 - 85: Supported
  4. 86: Supported
  5. 87 - 89: Supported

Safari

  1. 3.1 - 4: Not supported (but has polyfill available)
  2. 5 - 9.1: Supported
  3. 10: Supported
  4. 10.1 - 13.1: Supported
  5. 14: Supported
  6. TP: Supported

Opera

  1. 9 - 9.6: Not supported
  2. 10 - 10.5: Not supported (but has polyfill available)
  3. 10.6 - 12.1: Supported
  4. 15: Not supported
  5. 16 - 38: Supported
  6. 39 - 70: Supported
  7. 71: Supported

iOS Safari

  1. 3.2 - 9.3: Supported
  2. 10 - 13.7: Supported
  3. 14: Supported

Opera Mini

  1. all: Not supported

Android Browser

  1. 2.1 - 4.4.4: Supported
  2. 81: Supported

Blackberry Browser

  1. 7: Supported
  2. 10: Supported

Opera Mobile

  1. 10: Not supported (but has polyfill available)
  2. 11 - 12.1: Supported
  3. 59: Supported

Chrome for Android

  1. 85: Supported

Firefox for Android

  1. 79: Supported

IE Mobile

  1. 10: Supported
  2. 11: Supported

UC Browser for Android

  1. 12.12: Supported

Samsung Internet

  1. 4: Supported
  2. 5 - 11.2: Supported
  3. 12.0: Supported

QQ Browser

  1. 10.4: Supported

Baidu Browser

  1. 7.12: Supported

KaiOS Browser

  1. 2.5: Supported
Resources:
Simple demo
has.js test
WebPlatform Docs