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HTML Audio/Video DOM duration Property

❮ HTML Audio/Video DOM Reference

Example

Get the length of the current video:

let vid = document.getElementById("video1");
alert(vid.duration);
Try it Yourself »

Definition and Usage

The duration property returns the length of the current audio/video, in seconds.

If no audio/video is set, NaN (Not-a-Number) is returned.

Note: This property is read-only.


Browser Support

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

Property
duration Yes 9.0 3.5 Yes Yes

Syntax

audio|video.duration

Technical Details

Return Value: A Number, representing the length of the video, in seconds. If no video is set, "NaN" (Not-a-Number) is returned. If the video is streamed and has no predefined length, "Inf" (Infinity) is returned.

❮ HTML Audio/Video DOM Reference