The timeupdate event is fired when the time indicated by the currentTime attribute has been updated.
The event frequency is dependant on the system load, but will be thrown between about 4Hz and 66Hz (assuming the event handlers don't take longer than 250ms to run). User agents are encouraged to vary the frequency of the event based on the system load and the average cost of processing the event each time, so that the UI updates are not any more frequent than the user agent can comfortably handle while decoding the video.
| Property | Type | Description |
|---|---|---|
target Read only
| EventTarget | The event target (the topmost target in the DOM tree). |
type Read only
| DOMString | The type of event. |
bubbles Read only
| Boolean | Whether the event normally bubbles or not. |
cancelable Read only
| Boolean | Whether the event is cancellable or not. |
playingwaitingseekingseekedendedloadedmetadataloadeddatacanplaycanplaythroughdurationchangetimeupdateplaypauseratechangevolumechangesuspendemptiedstalled
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https://developer.mozilla.org/en-US/docs/Web/Events/timeupdate