Intent to Remove: MIDIMessageEvent.receivedTime attribute
Takashi Toyoshima
Primary eng (and PM) emails
Link to “Intent to Deprecate” thread
https://groups.google.com/a/chromium.org/d/topic/blink-dev/zOMo62KH8ns/discussion
Summary
Remove receivedTime attribute from MIDIMessageEvent at M-56.
Motivation
The WG decided to remove the receivedTime attribute. This is because the attribute was introduced to represent a high-resolution timestamp for real-time MIDI processing, but DOM Event started using hi-resolution monotonic time instead of epoch time for Event.timeStamp that can cover our use-case too.
Compatibility Risk
Chrome started supporting Web MIDI including this attribute from M-43. Other browser haven't supported Web MIDI yet, but FireFox is almost finishing JS binding implementation based on the latest spec.
At this point, the risk is very low because Chrome is the only available browser. And it should be better to remove it before FireFox starts supporting Web MIDI without this attribute.
Usage information from UseCounter
UseCounter says the usage is now <=0.0001%.
https://www.chromestatus.com/metrics/feature/timeline/popularity/1433
OWP launch tracking bug
crbug/com/599335
Entry on the feature dashboard
https://www.chromestatus.com/features/5665772797952000
Software Engineer, Google
Philip Jägenstedt
Jochen Eisinger
Chris Harrelson
lgtm2
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