Intent to ship: width and height attributes on <source> elements

[Boris Chiou]

As of Fx108, I intend to turn "the support of width/height attributes on source elements" on by default on all platforms. It has been developed behind the dom.picture_source_dimension_attributes.enabled preference. Status in other browsers is: Chrome and Safari have shipped this already.

Bug to turn on by default: https://bugzilla.mozilla.org/show_bug.cgi?id=1795953

Standard: https://github.com/whatwg/html/pull/5894 and https://html.spec.whatwg.org/multipage/embedded-content.html#the-source-element

This feature was previously discussed in this "Intent to prototype" thread: https://groups.google.com/a/mozilla.org/g/dev-platform/c/V0nhaTr86LA/m/aH-jZUqzAAAJ

Thanks

[Dianna Smith]

Hello,

Is it possible to initially enable this for the 108 early beta cycle only?

If there is no time constraint on shipping this feature, it would be good to expose it to a larger population on fx108 early beta and then by default for fx109.

This would give us a 6 weeks on beta before going to release.

Please let us know if this is possible or your thoughts.

Thank you,

Dianna Smith,
Firefox Release Manager

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[Emilio Cobos Álvarez]

On 10/19/22 04:13, Dianna Smith wrote:
> Is it possible to initially enable this for the 108 early beta cycle only?
> If there is no time constraint on shipping this feature, it would be
> good to expose it to a larger population on fx108 early beta and then by
> default for fx109.
> This would give us a 6 weeks on beta before going to release.
>
> Please let us know if this is possible or your thoughts.

It's definitely possible, but IMO it's a relatively small feature which
has been enabled on Nightly for more than a whole cycle already (see bug
1694741), so I'm not sure if it's worth it.

Is there a good reason why we'd want this feature to take more bake time
than usual?

Thanks,

-- Emilio

>
> Thank you,
> Dianna Smith,
> Firefox Release Manager
>
> On Tue, Oct 18, 2022 at 2:59 PM Boris Chiou <bch...@mozilla.com
> <mailto:bch...@mozilla.com>> wrote:
>
> As of Fx108, I intend to turn "the support of width/height
> attributes on source elements" on by default on all platforms. It
> has been developed behind the

> *dom.picture_source_dimension_attributes.enabled* preference. Status

> in other browsers is: Chrome and Safari have shipped this already.
>

> /Bug to turn on by default/:
> https://bugzilla.mozilla.org/show_bug.cgi?id=1795953

> <https://bugzilla.mozilla.org/show_bug.cgi?id=1795953>
>
> Standard: https://github.com/whatwg/html/pull/5894
> <https://github.com/whatwg/html/pull/5894> and

> https://html.spec.whatwg.org/multipage/embedded-content.html#the-source-element <https://html.spec.whatwg.org/multipage/embedded-content.html#the-source-element>

>
> This feature was previously discussed in this "Intent to prototype"
> thread:

> https://groups.google.com/a/mozilla.org/g/dev-platform/c/V0nhaTr86LA/m/aH-jZUqzAAAJ <https://groups.google.com/a/mozilla.org/g/dev-platform/c/V0nhaTr86LA/m/aH-jZUqzAAAJ>

>
>
> Thanks
>
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[Dianna Smith]

I wasn't sure what the impact was of the feature. If it's a low impact/low risk feature, I am ok with shipping it in 108.

Thank you!