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HTML Audio/Video DOM loadstart Event

HTML audio Tag Reference HTML Audio/Video DOM Reference

Example

Alert that the video is starting to load:

myVid=document.getElementById("video1");
myVid.onloadstart=alert("Starting to load video");

Try it Yourself »

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

Internet Explorer Firefox Opera Google Chrome Safari

The loadstart event is supported in all major browsers.

Note: This property is not supported in Internet Explorer 8 and earlier.


Syntax

In HTML:

<audio|video onloadstart="SomeJavaScriptCode">

In JavaScript:

audio|video.onloadstart=SomeJavaScriptCode;

Using addEventListener():

audio|video.addEventListener("loadstart", function()
  {
  //SomeJavaScriptCode
  }
);

Technical Details

Supported HTML tags: <audio>, <video>
Supported JavaScript objects: Audio, Video


Examples

More Examples

Use the onloadstart attribute on an HTML element

Use addEventListener() to listen for the loadstart event


HTML audio Tag Reference HTML Audio/Video DOM Reference

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