feature: IndexedDB status: caution tags: fallback gtie8 kind: api polyfillurls: IDBWrapper
IndexedDB was a volatile spec for a year, but has settled down. In addition to Chrome and Firefox, IE10 will have it; Opera has not yet implemented it and Safari has not yet committed to it.
IDBWrapper helps smooth out the cross-browser differences. You may consider falling back to WebSQL when IndexedDB isn't available, but do keep in mind that WebSQL has been abandoned.