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JavaScript Reference

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Browser BOM

Window Navigator Screen History Location

HTML DOM

DOM Document DOM Elements DOM Attributes DOM Events DOM Style

HTML Objects

<a> <abbr> <address> <area> <article> <aside> <audio> <b> <base> <bdo> <blockquote> <body> <br> <button> <canvas> <caption> <cite> <code> <col> <colgroup> <datalist> <dd> <del> <details> <dfn> <dialog> <div> <dl> <dt> <em> <embed> <fieldset> <figcaption> <figure> <footer> <form> <head> <header> <h1> - <h6> <hr> <html> <i> <iframe> <img> <ins> <input> button <input> checkbox <input> color <input> date <input> datetime <input> datetime-local <input> email <input> file <input> hidden <input> image <input> month <input> number <input> password <input> radio <input> range <input> reset <input> search <input> submit <input> text <input> time <input> url <input> week <kbd> <keygen> <label> <legend> <li> <link> <map> <mark> <menu> <menuitem> <meta> <meter> <nav> <object> <ol> <optgroup> <option> <output> <p> <param> <pre> <progress> <q> <s> <samp> <script> <section> <select> <small> <source> <span> <strong> <style> <sub> <summary> <sup> <table> <td> <th> <tr> <textarea> <time> <title> <track> <u> <ul> <var> <video>

Other Objects

CSSStyleDeclaration

Audio duration Property

Example

Get the length of an audio:

var x = document.getElementById("myAudio").duration;

The result of x could be:

1.515102

Try it Yourself »

Definition and Usage

The duration property returns the length of an audio, in seconds.

Note: Different browsers return different values. In the example above, Opera 18+ and Chrome returns "1.515102". Firefox returns "1.509298". Internet Explorer returns "1.5491875". Safari returns "1.5149999856948853", while Opera 12 returns "1.5092970520000002".

Note: This property is read-only.

Browser Support

Property
duration	Yes	Yes	Yes	Yes	Yes

Syntax

audioObject.duration

Technical Details

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