Intent to Deprecate: EventSource.URL and WebSocket.URL

[Philip Jägenstedt]

Primary eng (and PM) emails

phi...@opera.com

Summary

Deprecate EventSource.URL and WebSocket.URL

Motivation

The lower-case url attributes are standardized:

http://whatwg.org/C#the-eventsource-interface

http://whatwg.org/C#the-websocket-interface

They upper-case attributes aren't supported in any other engine I've tested:

http://jsconsole.com/?new%20WebSocket%28%22ws%3A%2F%2Fexample.com%2F%22%29.URL

http://jsconsole.com/?new%20EventSource%28%22http%3A%2F%2Fexample.com%2F%22%29.URL

Opera 12.16 (Presto), Firefox Nightly and IE11 were tested. Note that IE11 doesn't seem to support EventSource at all.

Compatibility Risk

Given the lack of support in Firefox and IE, risk seems low. WebKit-only mobile sites are probably most at risk.

Alternative implementation suggestion for web developers

Use EventSource.url and WebSocket.url attributes instead.

Usage information from UseCounter

EventSource.URL ~0.0005%: http://www.chromestatus.com/metrics/feature/timeline/popularity/254

WebSocket.URL ~0.02%: http://www.chromestatus.com/metrics/feature/timeline/popularity/255

Entry on chromestatus.com, crbug.com, or MDN

http://www.chromestatus.com/features/5311740673785856

http://www.chromestatus.com/features/6555138000945152

Requesting approval to remove too?

No, let the deprecation them be deprecated for at least one release cycle first.

[Eric Seidel]

lgtm, great.

[Dimitri Glazkov]

LGTM2.

[Jochen Eisinger]

lgtm3

[Joe Medley]

I have another email thread suggesting EventSource.URL was removed with M43. I need to know the story on both.

[Sigbjorn Finne]

Den 4/17/2015 21:47, Joe Medley skreiv:
> I have another email thread suggesting EventSource.URL was removed with
> M43. I need to know the story on both.
>

https://code.google.com/p/chromium/issues/detail?id=249727 has the story
on why we have the uppercase versions.

--sigbjorn

[Joe Medley]

I have to make sure certain web sites are updated. I don't need a story, just the exact version when the properties were removed.

Joe Medley | Technical Writer | jme...@google.com | 816-678-7195

[Joshua Bell]

EventSource's nonstandard URL alias was removed in blink r191340

WebSocket's nonstandard URL alias was removed in blink r191246

Per omahaproxy, 42 had blink @ r190579, 43 had blink @ r193137

So... 43 for both.

[Sigbjorn Finne]

Den 4/17/2015 21:56, Joe Medley skreiv:
> I have to make sure certain web sites are updated. I don't need a story,
> just the exact version when the properties were removed.
>

Ah, sorry, thanks for doing that. Both were removed on M43 --

EventSource.URL >= 43.0.2324.2
WebSocket.URL >= 43.0.2322.0

hth
--sigbjorn