Intent to Prototype and Ship: WebUSB SameObject
Jack Hsieh
Contact emails
Explainer
None
Specification
https://wicg.github.io/webusb/#device-usage
https://github.com/WICG/webusb/pull/212
Summary
Make USBConfiguration, USBInterface, USBAlternateInterface, and USBEndpoint instances returned by the accessors on USBDevice === comparable.
Blink component
Motivation
It is helpful for WebUSB to have USBConfiguration, USBInterface, USBAlternateInterface, and USBEndpoint instances returned by the accessors on USBDevice === comparable. We have seen this requirement reported by developers from https://crbug.com/1274922 and a positive signal from a Node.js polyfill (https://github.com/thegecko/webusb).
TAG review
The change is trivial enough to waive a TAG review requirement.
TAG review status
Not applicable
Risks
Interoperability and Compatibility
This change only adds the `===` compatibility to related objects and data structures while behaviors of the existing WebUSB APIs remain the same. Developers who don't rely on this `===` compatibility wouldn’t notice a thing with this feature rolling out behind the scenes, and so we believe the compatibility risk to be minimal.
Signals from other implementations (Gecko, WebKit):
Gecko: No signal
WebKit: No signal
Web developers: https://crbug.com/1274922.
Other signals: The Node.js polyfill for WebUSB (https://github.com/thegecko/webusb) already implements these accessors this way.
Debuggability
No specific DevTools changes are required. This feature only changes the internal behavior of existing WebUSB JS methods.
Note that exposing DevTools debugging support for device-access APIs (WebUSB included) is discussed at https://bugs.chromium.org/p/chromium/issues/detail?id=1142566.
Is this feature fully tested by web-platform-tests?
Yes. This feature will be fully tested at https://wpt.fyi/results/webusb
Flag name
None
Requires code in //chrome?
False
Tracking Bug
https://bugs.chromium.org/p/chromium/issues/detail?id=1274922
Estimated milestones
No milestones specified
Link to entry on the Chrome Platform Status
https://chromestatus.com/feature/5769668454252544
This intent message was generated by Chrome Platform Status.
Mike Taylor
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Yoav Weiss
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Chris Harrelson
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