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HTML Reference Manual

Complete List of HTML Tags

Áudio HTML/Video DOM loadstart event

The loadstart event is fired when the browser starts to load a resource file.

 Áudio HTML/Manual de Referência DOM de Vídeo

Online Example

Tip: The video has started to load:

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>HTML Audio/Use of video onloadstart event-Basic Tutorial(oldtoolbag.com)</title>
</head>
<body>
<video id="video1" controls="controls">
  <source src="movie.mp4" type="video/mp4">
  <source src="movie.ogg" type="video/ogg">
  Your browser does not support HTML5 video tag.
</video>
<script>
myVid=document.getElementById("video1");
myVid.onloadstart=alert("Starting to load video");
</script> 
</body>
</html>
Test to see ‹/›

Definition and Usage

When the browser starts to search for the specified audio/When the video occurs, the loadstart event is triggered. This is the time when the loading process starts

In audio/During the loading process of the video, the following events occur in the following order:

Browser Compatibility

IEFirefoxOperaChromeSafari

Todos os navegadores populares suportam o evento loadstart.

Atenção:Internet Explorer 8 e versões anteriores não suportam este evento.

Sintaxe

No HTML:

<audio|video onloadstart="SomeJavaScriptCode">

No JavaScript:

audio|video.onloadstart=SomeJavaScriptCode;

Usar addEventListener():

audio|video.addEventListener("loadstart", function()
  {
  //SomeJavaScriptCode
  }
);

Detalhes técnicos

Os seguintes tags HTML suportam:<audio>, <video>
Os seguintes objetos JavaScript suportam:Áudio, Vídeo

Mais exemplos

Usar a propriedade onloadstart em elementos HTML

Usar addEventListener() para ouvir o evento loadstart

 Áudio HTML/Manual de Referência DOM de Vídeo