Document durationThreshold in PerfObserver.observe() #21552
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Description
This PR updates https://developer.mozilla.org/en-US/docs/Web/API/PerformanceObserver/observe to add the
durationThresholdoption from the Event Timing API.Spec: https://w3c.github.io/event-timing/#sec-modifications-perf-timeline
Motivation
openwebdocs/project#62
Additional details
I also ordered the options list alphabetically and removed explicit mention of "
PerformanceObserverInitdictionary" because I believe we don't document dictionaries anymore and all we want readers to know is that it is an options object.Related issues and pull requests
In #21531 I'm adding more text to talk about
durationThresholdand I've added an example about it on thePerformanceEventTimingpage.