Intent to Remove: WebSocket.URL (uppercase attribute alias)

[Joshua Bell]

Primary eng (and PM) emails

jsb...@chromium.org
phi...@opera.com

Link to “Intent to Deprecate” thread

https://groups.google.com/a/chromium.org/d/msg/blink-dev/1m47rW4w7dc/MOf_2kgb2wIJw

Summary

Remove the previously deprecated `URL` attribute on the WebSocket interface, which is an alias for the standard `url` attribute.

Motivation

The uppercase attribute name dates from the earliest iterations of the WebSockets API proposal, circa 2009. By spec revisions in 2011 the API had switched to lowercase, and that was what standardized and implemented in other browsers. 

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

Usage information from UseCounter

https://www.chromestatus.com/metrics/feature/popularity#WebSocketURL

https://www.chromestatus.com/metrics/feature/timeline/popularity/255

Usage is hovering around 0.02% since the deprecation message went in last July.

Entry on chromestatus.com

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

Compatibility Risk

The uppercase attribute isn't supported in Opera 12.16 (Presto), Firefox Nightly and IE11, but per source inspection, the uppercase alias is still present in WebKit.

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

[Chris Harrelson]

LGTM

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[Philip Jägenstedt]

LGTM2!

Also LGTM to remove EventSource.URL as a separate CL, which was deprecated at the same time but has lower usage:

https://www.chromestatus.com/metrics/feature/timeline/popularity/254

Philip

[Takeshi Yoshino]

LGTM (non API owner)

Takeshi

[Dimitri Glazkov]

LGTM3

:DG<

[PhistucK]

Same as with EventSource - I think these numbers are not meaningful when we do not have the numbers for the WebSocket construction itself.

☆PhistucK