onloadstart Event
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onloadstart Event
❮ DOM Events
❮ ProgressEvent
Example
Execute a JavaScript when the video is starting to load:
<video onloadstart="myFunction()">Try it Yourself »
More "Try it Yourself" examples below.
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:
- onloadstart
- ondurationchange
- onloadedmetadata
- onloadeddata
- onprogress
- oncanplay
oncanplaythrough
Browser Support
The numbers in the table specify the first browser version that fully supports the
event.
| Event | |||||
|---|---|---|---|---|---|
| onloadstart | Yes | 9.0 | Yes | Yes | Yes |
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Syntax
In HTML:
<element onloadstart="myScript">
Try it Yourself »
In JavaScript:
object.onloadstart = function()myScript;
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In JavaScript, using the addEventListener() method:
object.addEventListener("loadstart", myScript);
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Note: The addEventListener() method is not supported in Internet Explorer 8 and earlier versions.
Technical Details
| Bubbles: | No |
|---|---|
| Cancelable: | No |
| Event type: | ProgressEvent |
| Supported HTML tags: | <audio> and <video> |
| DOM Version: | Level 3 Events |
More Examples
Example
Execute a JavaScript when the audio is starting to load:
<audio onloadstart="myFunction()">
Try it Yourself »
❮ DOM Events
❮ ProgressEvent
