Intent to Ship: IndexedDB 2.0
Victor Costan
Contact emails
pwn...@chromium.org, jsb...@chromium.org
Spec
https://w3c.github.io/IndexedDB/
TAG review: https://github.com/w3ctag/spec-reviews/issues/153
Summary
IndexedDB 2.0 (still in Editor's Draft) introduces a few APIs that optimize some database access patterns and improve programming ergonomics. We would like to support the full standard by shipping the following features:
* Support for binary keys: https://w3c.github.io/IndexedDB/#key-construct
* Object store renaming: https://w3c.github.io/IndexedDB/#dom-idbobjectstore-name
* Index renaming: https://w3c.github.io/IndexedDB/#dom-idbindex-name
* getKey() on IDBObjectStore: https://w3c.github.io/IndexedDB/#dom-idbobjectstore-getkey
* continuePrimaryKey() on IDBCursor: https://w3c.github.io/IndexedDB/#dom-idbcursor-continueprimarykey
Link to “Intent to Implement” blink-dev discussion
https://groups.google.com/a/chromium.org/d/topic/blink-dev/UpS11lcUkYg/discussion
Is this feature supported on all six Blink platforms (Windows, Mac, Linux, Chrome OS, Android, and Android WebView)?
Yes.
Demo link
Bevis Tseng from Mozilla has an excellent blog post outlining the use of these and other IDB 2.0 features for developers: https://hacks.mozilla.org/2016/10/whats-new-in-indexeddb-2-0/
Debuggability
IndexedDB has DevTools support.
http://crbug.com/693726 addresses adding binary key support. The other new features do not require new debugging capabilities.
Interoperability and Compatibility Risk
Interoperability: Firefox and Safari have already shipped interoperable implementations (citations below), so the interoperability risk is low.
Compatibility: We are adding new APIs, which have been carefully designed to avoid breaking existing sites. For example, adding continuePrimaryKey() was preferred over introducing new behavior to continue(). Also, Firefox has shipped, so this appears to be Web-compatible.
We have upstreamed tests covering the entire API to WPT. The IndexedDB tests are at https://github.com/w3c/web-platform-tests/tree/master/IndexedDB
* Support for binary keys: idb_binary_key_conversion.htm, idbfactory_cmp3.htm, idbfactory_cmp4.htm
* Object store renaming: idbojectstore-rename-store.html, idbojectstore-rename-abort.html, idbojectstore-rename-errors.html
* Index renaming: idbindex-rename.html, idbindex-rename-abort.html, idbindex-rename-errors.html
* getKey() on IDBObjectStore: idbobjectstore_getKey.html, idbobjectstore_getKey{2-8}.html
* continuePrimaryKey() on IDBCursor: idbcursor-continuePrimaryKey.htm, idbcursor-continuePrimaryKey-exceptions.htm, idbcursor-continuePrimaryKey-exception-order.htm
Edge: No signals
Firefox: Shipped - https://hacks.mozilla.org/2016/10/whats-new-in-indexeddb-2-0/
Safari: Shipped - https://developer.apple.com/library/prerelease/content/releasenotes/General/WhatsNewInSafari/Articles/Safari_10_1.html
Victor Costan
Chris Harrelson
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Dimitri Glazkov
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Jochen Eisinger
lgtm3