Braw mornin' TAG!

I'm requesting a TAG review of the showPicker() method for HTMLInputElement.

The showPicker() element is a new addition to HTMLInputElement which addresses a very common request from web developers: programmatically showing a picker for controls like date etc.

• Explainer¹ (minimally containing user needs and example code): inline in Add showPicker() to <input> elements whatwg/html#7319
• Specification URL: draft at https://whatpr.org/html/7319/input.html#dom-input-showpicker
• Tests:
  • https://github.com/web-platform-tests/wpt/blob/master/html/semantics/forms/the-input-element/show-picker.tentative.html
  • https://github.com/web-platform-tests/wpt/blob/master/html/semantics/forms/the-input-element/show-picker-cross-origin-iframe.tentative.html
• User research: None
• Security and Privacy self-review²: Hopefully not necessary; if you think it is let us know and we can fill it out.
• GitHub repo (if you prefer feedback filed there): Add showPicker() to <input> elements whatwg/html#7319
• Primary contacts (and their relationship to the specification):
  • Domenic Denicola (@domenic, Google, specifier)
  • François Beaufort (@beaufortfrancois, Google, implementer and person who started us on this journey)
• Organization(s)/project(s) driving the specification: WHATWG HTML triage call (Upcoming HTML standard issue triage meeting on 8/5/2021 whatwg/html#6884)
• Key pieces of existing multi-stakeholder review or discussion of this specification: Proposal: Add a way to open programmatically a date picker whatwg/html#6909; Should <input type=date> have a "input activation behavior" defined?  whatwg/html#3232 is also relevant
• External status/issue trackers for this specification (publicly visible, e.g. Chrome Status): https://www.chromestatus.com/feature/5692248021794816

Further details:

• I have reviewed the TAG's Web Platform Design Principles
• Relevant time constraints or deadlines: The next WHATWG HTML triage call is 2021-12-02 and it'd be great to have any feedback by then
• The group where the work on this specification is currently being done: WHATWG
• The group where standardization of this work is intended to be done (if current group is a community group or other incubation venue): N/A
• Major unresolved issues with or opposition to this specification: None known
• This work is being funded by: Google

We'd prefer the TAG provide feedback as (please delete all but the desired option):

💬 leave review feedback as a comment in this issue and @-notify @domenic, @beaufortfrancois, and @annevk