IndexedDB

- REC

Method of storing data client-side, allows indexed database queries.

IE

  1. 5.5 - 9: Not supported
  2. 10: Partial support
  3. 11: Partial support

Edge

  1. 12 - 18: Partial support
  2. 79 - 86: Supported
  3. 87: Supported

Firefox

  1. 2 - 3.6: Not supported
  2. 4 - 9: Partial support
  3. 10 - 15: Supported
  4. 16 - 82: Supported
  5. 83: Supported
  6. 84 - 85: Supported

Chrome

  1. 4 - 9: Not supported (but has polyfill available)
  2. 10: Not supported
  3. 11 - 22: Partial support
  4. 23: Supported
  5. 24 - 86: Supported
  6. 87: Supported
  7. 88 - 90: Supported

Safari

  1. 3.1 - 7: Not supported (but has polyfill available)
  2. 7.1 - 9.1: Partial support
  3. 10 - 13.1: Supported
  4. 14: Supported
  5. TP: Supported

Opera

  1. 9 - 10.1: Not supported
  2. 10.5 - 12.1: Not supported (but has polyfill available)
  3. 15 - 71: Supported
  4. 72: Supported

iOS Safari

  1. 3.2 - 7.1: Not supported (but has polyfill available)
  2. 8 - 9.3: Partial support
  3. 10 - 13.7: Supported
  4. 14: Supported

Opera Mini

  1. all: Not supported

Android Browser

  1. 2.1 - 4.3: Not supported (but has polyfill available)
  2. 4.4 - 4.4.4: Supported
  3. 81: Supported

Opera Mobile

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

Chrome for Android

  1. 87: Supported

Firefox for Android

  1. 83: Supported

UC Browser for Android

  1. 12.12: Supported

Samsung Internet

  1. 4 - 12.0: Supported
  2. 13.0: Supported

QQ Browser

  1. 10.4: Supported

Baidu Browser

  1. 7.12: Supported

KaiOS Browser

  1. 2.5: Supported
Resources:
Polyfill for browsers supporting WebSQL
Mozilla Hacks article
has.js test
WebPlatform Docs