Safari IndexedDB/WebSQL bug wishlist

wishlist.md

Safari IndexedDB/WebSQL bug wishlist

Big overview of what's missing in Safari 7.1+ and iOS 8+ in terms of browser storage.

Updated May 25th 2016

Safari (general)

• IndexedDB onupgradeneeded not firing correctly in Safari/iOS 8 Fixed in iOS 9
• IndexedDB transaction throw error for multiple object store Fixed in WebKit nightly!
• IndexedDB is deleting data when a PK is shared amongst two objectStores fixed in iOS 9
• IndexedDB array index keys are concated across cursor lifetime fixed in iOS 9
• Add ObjectStore Blob Support for IndexedDB Fixed in WebKit Nightly!
• indexeddb versionchange event not fired Fixed in WebKit Nightly!
• IndexedDB does not throw ConstraintErrors for unique keys Fixed in WebKit Nightly!
• IndexedDB openKeyCursor() returns primaryKeys in wrong order Fixed in WebKit Nightly!
• IndexedDB is not available in a web worker Fixed in WebKit Nightly!

UIWebView

• window.indexedDB, IDBCursor and IDBKeyRange should be undefined when IndexedDB isn't available fixed in iOS 9

WKWebView

• WKWebView: openDatabase results in DOM Exception 18 fixed in WebKit nightly!
• WKWebView: IndexedDB data doesn't survive an app relaunch bug in Cordova configuration, not WKWebView; see database-filler for working demo

Homescreen apps/Chrome for iOS

• In home screen WebApps websql do not response after standyby under IOS 8 fixed in iOS 8.2
• openDatabase intermittently triggers SecurityError: DOM Exception 18 in Chrome on iOS fixed in latest Chrome regressed because of Chrome switching to WKWebView

More details

• IndexedDB on iOS 8 – Broken Bad (see comments especially)
• PouchDB – Safari Madness

It appears that IndexedDB on iOS does not recycle it's storage at all, meaning that writing a small object (e.g. 2 KB) many, many times, will eventually use up the phone storage. I had a small app running for a day updating only 5 records (of a total of 5 records) that was written probably millions of times over the course of a day, and it ended up using 1.5 GB of reported storage use. For the test I used LokiJS as a wrapper over IndexedDB, but have verified the same behavior with IndexedDB API directly.

Anyone else seeing or experiencing similar behavior? Is there some API that can be called to make iOS release "unused storage" somehow?

Some more details on the issue here: techfort/LokiJS#620