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HTML 音频/视频 DOM preload 属性

❮ HTML 音频/视频 DOM 参考

示例

页面加载后立即开始加载视频

let vid = document.getElementById("myVideo");
vid.preload = "auto";
自己试试 »

定义和用法

preload 属性设置或返回音频/视频是否应在页面加载后立即开始加载。

preload 属性允许作者向浏览器提供有关他/她认为最符合用户体验的提示。此属性在某些情况下可能会被忽略。


浏览器支持

表中的数字指定完全支持该属性的第一个浏览器版本。

属性
preload 9.0 4.0

语法

返回 preload 属性

audio|video.preload

设置 preload 属性

audio|video.preload="auto|metadata|none"

属性值

描述
auto 指示音频/视频应在页面加载后立即开始加载
metadata 指示页面加载时只应加载音频/视频的元数据
none 指示音频/视频不应在页面加载后立即开始加载

技术细节

返回值 一个字符串,表示应预加载什么数据(如果有)。可能的返回值为“auto”、“metadata”或“none”。有关值的含义,请参见“属性值”

❮ HTML 音频/视频 DOM 参考
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