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HTML onloadedmetadata 事件属性

❮ HTML 事件属性

示例

视频元数据加载时发出警报

<script>
function myFunction() {
  alert("视频元数据已加载");
}
</script>

<video onloadedmetadata="myFunction()">
自己尝试 »

下面还有更多“自己尝试”示例。


定义和用法

当指定音频/视频的元数据加载时,会发生 loadedmetadata 事件。

音频/视频的元数据包括:持续时间、尺寸(仅限视频)和文本轨道。

在音频/视频的加载过程中,以下事件按此顺序发生

  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
loadedmetadata 9.0

语法

<element onloadedmetadata="script">

属性值

描述
script 元数据加载时要运行的脚本

技术细节

支持的 HTML 标签 <audio> 和 <video>

更多示例

示例

音频元数据加载时发出警报

<script>
function myFunction() {
  alert('音频元数据已加载');
}
</script>

<audio onloadedmetadata="myFunction()">
自己尝试 »

❮ HTML 事件属性

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