We're proposing to remove the XPCOM service nsIScriptableDateFormat,
used for locale-appropriate formatting of date/time values.[1]
Front-end code that needs this functionality should move to the standard
JS i18n APIs.[2,3] I've got a bunch of patches just about ready to land
in [4] that make this switch for most of our existing call-sites in
mozilla-central.
Once we have switched all m-c users of nsIScriptableDateFormat over to
Intl.DateTimeFormat and related standard APIs, we'd like to remove the
nsIScriptableDateFormat interface itself (and ultimately the
platform-specific implementations of nsIDateTimeFormat that back it).
We don't want to maintain that code any longer, given that we now have a
standards-based version of essentially equivalent functionality.
We may not be able to completely eliminate the old code until the
ECMA402 Intl API is enabled on Android.[5] But this message is intended
as a heads-up that its doom is approaching....
This will, of course, also affect code outside of mozilla-central --
e.g. comm-central, add-ons -- that uses nsIScriptableDateFormat. Such
code should also migrate to the standard JS APIs for date/time formatting.
I've filed [6] about deprecating the interface; once we have publicly
done that, I expect the next step will be complete removal.
JK
[1]
https://dxr.mozilla.org/mozilla-central/source/intl/locale/nsIScriptableDateFormat.idl
[2] https://tc39.github.io/ecma402/#datetimeformat-objects
[3]
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/DateTimeFormat
[4] https://bugzilla.mozilla.org/show_bug.cgi?id=1301655
[5] https://bugzilla.mozilla.org/show_bug.cgi?id=1215252
[6] https://bugzilla.mozilla.org/show_bug.cgi?id=1313625
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