Can I use
?

Geolocation

- REC

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

Chrome

  1. ◐ 4: Partial support
  2. ✅ 5 - 49: Supported
  3. ✅ 50 - 143: Supported
  4. ✅ 144: Supported
  5. ✅ 145 - 147: Supported

Edge

  1. ✅ 12 - 18: Supported
  2. ✅ 79 - 143: Supported
  3. ✅ 144: Supported

Safari

  1. ❌ 3.1 - 4: Not supported (but has polyfill available)
  2. ✅ 5 - 9.1: Supported
  3. ✅ 10: Supported
  4. ✅ 10.1 - 26.1: Supported
  5. ✅ 26.2: Supported
  6. ✅ 26.3 - TP: Supported

Firefox

  1. ❌ 2 - 3: Not supported (but has polyfill available)
  2. ✅ 3.5 - 54: Supported
  3. ✅ 55 - 146: Supported
  4. ✅ 147: Supported
  5. ✅ 148 - 150: 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 - 124: Supported
  7. ✅ 125: 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. ✅ 144: Supported

Safari on iOS

  1. ✅ 3.2 - 9.3: Supported
  2. ✅ 10 - 26.1: Supported
  3. ✅ 26.2: Supported
  4. ✅ 26.3: Supported

Samsung Internet

  1. ✅ 4: Supported
  2. ✅ 5 - 28: Supported
  3. ✅ 29: Supported

Opera Mini

  1. ❌ all: Not supported

Opera Mobile

  1. ❌ 10: Not supported (but has polyfill available)
  2. ✅ 11 - 12.1: Supported
  3. ✅ 80: Supported

UC Browser for Android

  1. ✅ 15.5: Supported

Android Browser

  1. ✅ 2.1 - 4.4.4: Supported
  2. ✅ 144: Supported

Firefox for Android

  1. ✅ 147: Supported

QQ Browser

  1. ✅ 14.9: Supported

Baidu Browser

  1. ✅ 13.52: Supported

KaiOS Browser

  1. ✅ 2.5: Supported
  2. ✅ 3: Supported
Resources:
Geolocation API on MDN
has.js test
WebPlatform Docs