Dialog closedby attribute and requestClose() function

[lukewarlow]

WebKittens

No response

Title of the spec

Dialog light dismiss

URL to the spec

https://html.spec.whatwg.org/multipage

URL to the spec's repository

No response

Issue Tracker URL

No response

Explainer URL

No response

TAG Design Review URL

No response

Mozilla standards-positions issue URL

mozilla/standards-positions#998

WebKit Bugzilla URL

No response

Radar URL

No response

Description

This is a request for a WebKit standards position on the idea of adding (optional) light dismiss functionality to Dialogs.
See whatwg/html#9373 for the discussion. The current proposal is a new attribute closedby (naming TBD) with three values allowing no close bahaviour, close watcher behaviour, or close watcher and light dismiss behaviour.

[lukewarlow]

Draft PR to give a rough idea of what this could look like whatwg/html#10157

[annevk]

It's rather unclear what the actual state of this proposal is. I take it whatwg/html#9373 (comment) is the current proposal still? I don't understand how people are now comfortable with changing the default. How does that reconcile with whatwg/html#9373 (comment)?

And if Esc somehow already closes dialogs or soon will be capable of closing all existing dialogs, why would we add a way to declaratively disable that again?

[lukewarlow]

To clarify the default will be the existing behaviour. No change will happen until you add the attribute with a specific value. In html terms the missing value state will be an "auto" state with no corresponding keyword.

whatwg/html#10157 - here's a rought draft PR.

I will take a look at the stacking stuff not familiar enough to answer.

As for why to offer a way to disable it, well we need the mechanism to match existing behaviour for non-modal dialogs, and we may as well allow that for modal dialogs too? I believe Domenic may have mentioned that it's come up as a feature request too.

[lukewarlow]

To update this the latest PR is at whatwg/html#10737

[miketaylr]

Note there is an Intent to Ship on blink-dev https://groups.google.com/a/chromium.org/g/blink-dev/c/_pIOAyg1_E0/m/DnkvfQLVDgAJ for this feature - whatwg/html#10737 is landed as https://html.spec.whatwg.org/#attr-dialog-closedby.

Now would be a good time to provide feedback (or a position one way or another), if any. cc @annevk

[annevk]

While colleagues and I were not happy with how this landed in the HTML standard as discussed in whatwg/html#10906, the feature itself seems reasonable. As such, I suggest we resolve this as "position: support" one week from now.