Intent to Remove: Element.prefix setter

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Philip Jägenstedt

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Oct 31, 2014, 8:50:18 AM10/31/14
to blink-dev

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phi...@opera.com


Link to “Intent to Deprecate” thread

https://groups.google.com/a/chromium.org/d/msg/blink-dev/Tu9pL7gMPyo/f-eYf_AkpQMJ


The deprecation was in M37, which reached stable a little over two months ago.

Summary

In Element.idl, make attribute DOMString prefix readonly.


Motivation

The attribute is readonly in the spec: 

https://dom.spec.whatwg.org/#element 


Ad-hoc testing shows that none of Firefox, IE or Presto support the setter: 

http://software.hixie.ch/utilities/js/live-dom-viewer/?saved=3042


Usage information from UseCounter

https://www.chromestatus.com/metrics/feature/timeline/popularity/224


The peak value to date is 0.0008%.

Entry on chromestatus.com

None.


Compatibility Risk

Element.prefix has to do with namespaces, so old XML-based Web apps seem most likely to use it. Since IE doesn't support the setter that doesn't seem very likely.

Dimitri Glazkov

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Oct 31, 2014, 12:46:52 PM10/31/14
to Philip Jägenstedt, blink-dev
LGTM.

Philip Rogers

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Oct 31, 2014, 4:42:38 PM10/31/14
to Dimitri Glazkov, Philip Jägenstedt, blink-dev
LGTM

Chris Harrelson

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Nov 4, 2014, 11:56:56 AM11/4/14
to Philip Rogers, Dimitri Glazkov, Philip Jägenstedt, blink-dev
LGTM

LGTM
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