Web SQL Database support

Web SQL Database is supported in all modern WebKit browsers. This includes Chrome and Mobile Safari on Android and iOS devices, respectively. Support on Android goes all the way back to Android 2.1, while support on iOS goes all the way back to iOS 3.2. On desktop browsers, support has been around for even longer.

Notably missing from this list is Internet Explorer and Firefox. These browsers only support IndexedDB (and IE only partially). There is no support for Web SQL Database to be found in either their desktop versions or their mobile versions. If you ever decide to eventually target Windows Phone or Firefox OS, you might want to be aware of this and plan accordingly.

When using browser-provided Web SQL Database support, we are constrained by storage limitations. In order to ensure that a website or an app won't just eat up all the space on a computer, browsers enforce quotas on the size of the database. This usually starts out at 5 MB. Most browsers will allow...