Permissions prompt for Web Midi API

[Ajay Rahatekar]

Hello API owners,

The Google Web Audio team is working with the Trust and Safety team on gating the Web Midi API behind a permissions prompt. Can you please advise if an Intent to Ship is needed for this change? Would a PSA to blink-dev suffice as an announcement of this change?

Thanks in advance.

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Ajay Rahatekar | Technical Program Manager | ajayra...@google.com | 650-797-1279

[Chris Harrelson]

Hi Ajay,

Question: Am I correct that developers are always provided access to Web Midi today, if they ask for it?

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[Chris Wilson]

On secure domains, if system-exclusive access is not requested, and Web MIDI is not disabled, yes.  

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[Chris Harrelson]

Ok. Browser policies gating access to APIs are outside the scope of the API owners and the Intent process. However, since this is a case where we're going from no permission prompt to a permission prompt, I think a PSA and developer communication is a good idea. Other chromium-based browsers may want to know as well, via these channels.

Also: will there be a permission prompt by default to use the feature in Chromium? (Not Chrome.)

[Alvin Ji]

I'll try to answer the question while Hongchan is OoO this week.

Yes we wish to have the permission prompt by default to use the feature in Chromium.

[Hongchan Choi]

Thanks, Chris. Then we'll go forward with a PSA via blink-dev.

> Other chromium-based browsers may want to know as well, via these channels.

Could you elaborate what "channels" mean? What are other channels except for blink-dev?

> Also: will there be a permission prompt by default to use the feature in Chromium? (Not Chrome.)

Yes. I believe it's sensible to be consistent everywhere.

Cheers,

Hongchan

[Ajay Rahatekar]

Friendly ping to close the loop on the request for Hongchan:

Could you elaborate what "channels" mean? What are other channels except for blink-dev?

[Jeff Kaufman]

I don't see a message on blink-dev; did a PSA get sent?  https://groups.google.com/a/chromium.org/g/blink-dev/search?q=midi

MDN documents this as "The user must explicitly grant permission to use the API though a user-agent specific mechanism, or have previously granted permission" even though the only implementing browsers are Chromium-based: https://developer.mozilla.org/en-US/docs/Web/API/Navigator/requestMIDIAccess. It would be good to get this behind a prompt.

Jeff

[Ajay Rahatekar]

Hi Jeff,

The team is currently working on the PSA and we will send it out as soon as possible.

_Ajay

[Ajay Rahatekar]

To close the loop on this thread, PSA: https://groups.google.com/a/chromium.org/g/blink-dev/c/nz320H9J6bs/m/_Ou-_PQaMAAJ