Web SQL Database

- UNOFF

Method of storing data client-side, allows SQLite database queries for access and manipulation

IE

  1. 5.5 - 10: Not supported
  2. 11: Not supported

Edge

  1. 12 - 18: Not supported
  2. 79 - 89: Supported
  3. 90: Supported

Firefox

  1. 2 - 87: Not supported
  2. 88: Not supported
  3. 89 - 90: Not supported

Chrome

  1. 4 - 89: Supported
  2. 90: Supported
  3. 91 - 93: Supported

Safari

  1. 3.1 - 12.1: Supported
  2. 13 - 14: Not supported
  3. 14.1: Not supported
  4. TP: Not supported

Opera

  1. 9 - 10.1: Not supported
  2. 10.5 - 74: Supported
  3. 75: Supported

Safari on iOS

  1. 3.2 - 12.4: Supported
  2. 13 - 14.4: Not supported
  3. 14.5: Not supported

Opera Mini

  1. all: Not supported

Android Browser

  1. 2.1 - 4.4.4: Supported
  2. 90: Supported

Opera Mobile

  1. 10: Not supported
  2. 11 - 12.1: Supported
  3. 62: Supported

Chrome for Android

  1. 90: Supported

Firefox for Android

  1. 87: Not supported

UC Browser for Android

  1. 12.12: Supported

Samsung Internet

  1. 4 - 13.0: Supported
  2. 14.0: Supported

QQ Browser

  1. 10.4: Supported

Baidu Browser

  1. 7.12: Supported

KaiOS Browser

  1. 2.5: Not supported

The Web SQL Database specification is no longer being maintained and support may be dropped in future versions.

Resources:
HTML5 Doctor article
has.js test