Intent to Implement: intrinsicsize attribute

[Luna Lu]

Contact emails

loon...@chromium.org, icle...@chromium.org

Spec None Explainer

Summary Allows developers to specify the intrinsic size for media elements (<img> and <video>).

This attribute will override media elements' intrinsic sizing info. Specifically, a <img> element's naturalWidth/naturalHeight will reflect the values specified in this attribute. Similarly, a <video> element's videoWidth/videoHeight will reflect the values specified in this attribute.

Motivation
This attribute will allow media elements to maintain the aspect ratio. It will allow developers to only specify one dimension (to a percentage or pixel value) and have the other dimension computed immediately without causing a visual re-flow.

Interoperability risk Firefox: No public signals Edge: No public signals Safari: No public signals Web developers: No signals Compatibility risk This attribute modifies the behavior of <img> and <video> elements. The intrinsic size of the media elements dimension will be overridden by this attribute. In addition, it will change the way intrinsic size is determined for responsive images.

Will this feature be supported on all six Blink platforms (Windows, Mac, Linux, Chrome OS, Android, and Android WebView)? Yes. OWP launch tracking bug https://crbug.com/874629 Link to entry on the Chrome Platform Status https://www.chromestatus.com/feature/4704436815396864 Requesting approval to ship? Yes.

Luna Lu | Software Engineer | loon...@google.com | +1 519 513 5751

[fantasai]

On 08/15/2018 03:17 PM, Luna Lu wrote:

Contact emails

loon...@chromium.org, icle...@chromium.org

Spec None Explainer

This returns a 404.

Summary Allows developers to specify the intrinsic size for media elements (<img> and <video>).

This attribute will override media elements' intrinsic sizing info. Specifically, a <img> element's naturalWidth/naturalHeight will reflect the values specified in this attribute. Similarly, a <video> element's videoWidth/videoHeight will reflect the values specified in this attribute.

Motivation This attribute will allow media elements to maintain the aspect ratio. It will allow developers to only specify one dimension (to a percentage or pixel value) and have the other dimension computed immediately without causing a visual re-flow.

If the main use case is preserving the aspect ratio, why isn't it possible to set an aspect ratio without setting a size?
(Or is it? I can't tell, since there's no spec and the explainer link is a 404.)

Interoperability risk Firefox: No public signals Edge: No public signals Safari: No public signals Web developers: No signals Requesting approval to ship? Yes

Why do you think it's a good idea to publicly ship a feature that has no spec, no public signals of support from other vendors, none from web developers, and (afaict from your Intent to Implement) no review by relevant standards expertise such as the CSSWG or the TAG or the HTML spec editors at WHATWG and therefore (again, afaict) has not received any significant design review or approval from the community outside of your Chrome Team colleagues?

~fantasai

[Yoav Weiss]

On Thu, Aug 16, 2018 at 1:50 AM fantasai <fantasa...@inkedblade.net> wrote:

On 08/15/2018 03:17 PM, Luna Lu wrote:

Contact emails

loon...@chromium.org, icle...@chromium.org

Spec None Explainer

This returns a 404.

Indeed. I believe the explainer is at https://github.com/ojanvafai/intrinsicsize-attribute/blob/master/README.md

As the email's title indicates "intent to implement", I believe this request to ship was not intentional. Luna - can you clarify?

 

~fantasai

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[loon...@chromium.org]

Sorry. 

Yes explainer is at : https://github.com/ojanvafai/intrinsicsize-attribute/blob/master/README.md

This intent is intent to implement, so intent to ship is not needed for now. 

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[lun...@google.com]

Sorry. 

Yes explainer is at : https://github.com/ojanvafai/intrinsicsize-attribute/blob/master/README.md

This email is intent to implement, so intent to ship is not needed for now. 

On Thursday, August 16, 2018 at 6:18:07 AM UTC-4, Yoav Weiss wrote:

[amelia.bel...@gmail.com]

Are there any plans to make a formal proposal to have this attribute added to HTML?

A month after this Intent to Implement request for Chromium, I don't see any directly relevant issues on either the WHATWG or W3C HTML standards issue trackers, nor any dedicated WICG discussion threads.

I agree that the ability to set a image aspect ratio in the markup is strongly needed, and is especially important as part of the lazyload proposal. But I'd recommend discussing the syntax in a standards forum, with input from other browser teams and people working on related standards proposals, before spending too much effort on an implementation.

~Amelia BR