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HTML onloadstart Attribute


Definition and Usage

The onloadstart event occurs when the browser starts looking for the specified audio/video. This is when the loading process starts.

During the loading process of an audio/video, the following events occur, in this order:

  1. loadstart
  2. durationchange
  3. loadedmetadata
  4. loadeddata
  5. progress
  6. canplay
  7. canplaythrough

Applies to

The onloadstart attribute is part of the Event Attributes, and can be used on the following elements:

Elements Event
<audio> loadstart
<video> loadstart

Examples

Audio Example

Run "myFunction" when the data starts to load:

<audio onloadstart="myFunction()">
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Video Example

Run "myFunction" when the data starts to load:

<video onloadstart="myFunction()">
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Browser Support

The onloadstart attribute has the following browser support for each element:

Element
audio Yes 9.0 Yes Yes Yes
video Yes 9.0 Yes Yes Yes