Value

A double-precision floating-point value indicating the duration of the media in seconds. If no media data is available, the value NaN is returned. If the element's media doesn't have a known duration—such as for live media streams—the value of duration is Infinity.

Examples

const obj = document.createElement("video");
console.log(obj.duration); // NaN

Specifications

Browser compatibility

See also

• Web media technologies
• HTMLMediaElement.currentTime: The current playback position of the media
• The <audio> and <video> elements