HTMLAudioElement play event fires a little before the audio actually starts playing

• Component: Media
• Status: NEW ---

The HTMLAudioElement `play` event fires a little before the audio actually starts playing (maybe about 0.3 seconds?).
The URL below [1] is a test for this phenomenon.
The spec[2] explains the play event as "Fired when : The element is no longer paused. Fired after the `play()` method has returned, or when the autoplay attribute has caused playback to begin."
Isn't it a bug that the play event fires hundreds of milliseconds before the audio actually starts playing?
[1] : https://axt-ayakoto.github.io/web-playground/htmlmediaelement-play-event/
[2] : https://html.spec.whatwg.org/multipage/media.html#event-media-play

(This is my first time making a report, am I doing it correctly?)

This phenomenon occurs in the following environments:

- MacBook Air M2, 2022 / macOS Sonoma 14.5 / Safari Technology Preview Release 199 (Safari 18.0, WebKit 19619.1.22.5)
- MacBook Air M2, 2022 / macOS Sonoma 14.5 / Safari 17.5 (19618.2.12.11.6)
- 10.9-inch iPad (10th generation) / iPadOS 17.5.1 / Safari 17.5

Note: This phenomenon does not occur in the following environments:
- MacBook Air M2, 2022 / macOS Sonoma 14.5 / Google Chrome Dev 129.0.6614.3

[Ahmad Saleem]

*** Safari 18 Beta ***

The logs will be output here.
The "currentTime" of "play" and "playing" should be very close to 1.0000.
play :
  currentTime : 0.7783
playing :
  currentTime : 0.7809
play().then() : 
  currentTime : 0.7815
timeupdate :
  currentTime : 1.0293
  fired at    : 0.1320
  diff        : 0.8973

*** Chrome Canary 129 ***

The logs will be output here.
The "currentTime" of "play" and "playing" should be very close to 1.0000.
play :
  currentTime : 0.6938
playing :
  currentTime : 0.6941
play().then() : 
  currentTime : 0.6945
timeupdate :
  currentTime : 0.9589
  fired at    : 0.0427
  diff        : 0.9163

*** Firefox Nightly 130 ***

The logs will be output here.
The "currentTime" of "play" and "playing" should be very close to 1.0000.
play :
  currentTime : 0.7319
playing :
  currentTime : 0.7319
play().then() : 
  currentTime : 0.7319
timeupdate :
  currentTime : 0.9949
  fired at    : 0.0285
  diff        : 0.9664

[Radar WebKit Bug Importer]

<rdar://problem/132764953>