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<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

onloadstart Event

Example

Execute a JavaScript when the video is starting to load:

<video onloadstart="myFunction()">

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More "Try it Yourself" examples below.

Definition and Usage

The onloadstart 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:

Browser Support

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

Event
onloadstart	Yes	9.0	Yes	Yes	Yes

Syntax

In HTML:

<element onloadstart="myScript">

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In JavaScript:

object.onloadstart=function(){myScript};

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In JavaScript, using the addEventListener() method:

object.addEventListener("loadstart", myScript);

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Note: The addEventListener() method is not supported in Internet Explorer 8 and earlier versions.

Technical Details

Bubbles:	No
Cancelable:	No
Event type:	Event
Supported HTML tags:	<audio> and <video>
DOM Version:	Level 3 Events

More Examples

Example

Execute a JavaScript when the audio is starting to load:

<audio onloadstart="myFunction()">

Try it Yourself »