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This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
The read-only HTMLMediaElement property duration indicates the length of the element's media in seconds.
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.
| HTML # dom-media-duration-dev |
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This page was last modified on May 30, 2025 by MDN contributors.
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