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HTML onloadstart 事件属性

❮ HTML 事件属性

示例

提醒视频开始加载

<script>
function myFunction() {
  alert('开始加载视频');
}
</script>

<video onloadstart="myFunction()">
尝试一下 »

下面还有更多“尝试一下”示例。


定义和用法

当浏览器开始查找指定的音频/视频时,会发生 loadstart 事件。这是加载过程开始的时候。

在音频/视频的加载过程中,以下事件将按以下顺序发生

  1. loadstart
  2. durationchange
  3. loadedmetadata
  4. loadeddata
  5. progress
  6. canplay
  7. canplaythrough

浏览器支持

表中的数字指定完全支持该事件的第一个浏览器版本。

事件
loadstart 9.0

语法

<element onloadstart="script">

属性值

描述
script 加载过程开始时要运行的脚本

技术细节

支持的 HTML 标签 <audio> 和 <video>

更多示例

示例

提醒音频开始加载

<script>
function myFunction() {
  alert('开始加载音频');
}
</script>

<audio onloadstart="myFunction()">
尝试一下 »

❮ HTML 事件属性

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