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HTML onloadstart Event Attribute

❮ HTML Event Attributes

Example

Alert that the video is starting to load:

<script>
function myFunction() {
  alert('Starting to load video');
}
</script>

<video onloadstart="myFunction()">
Try it Yourself »

More "Try it Yourself" examples below.


Definition and Usage

The loadstart 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

Browser Support

The numbers in the table specify the first browser version that fully supports the event.

Event
loadstart Yes 9.0 Yes Yes Yes

Syntax

<element onloadstart="script">

Attribute Values

Value Description
script The script to be run when the loading process starts

Technical Details

Supported HTML tags: <audio> and <video>

More Examples

Example

Alert that the audio is starting to load:

<script>
function myFunction() {
  alert('Starting to load audio');
}
</script>

<audio onloadstart="myFunction()">
Try it Yourself »

❮ HTML Event Attributes