HTMLMediaElement.networkState

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

HTMLMediaElement.networkState 属性表示在网络上获取媒体的当前状态。

语法

var networkState = audioOrVideo.networkState;

取值

一个 unsigned short。可能的值包括:

常量 描述
NETWORK_EMPTY 0 还没有数据。并且 readyState 的值是 HAVE_NOTHING
NETWORK_IDLE 1 HTMLMediaElement 是有效的并且已经选择了一个资源,但是还没有使用网络。
NETWORK_LOADING 2 浏览器正在下载 HTMLMediaElement 数据。
NETWORK_NO_SOURCE 3 没有找到 HTMLMediaElement src。

示例

这个例子监听 audio 元素以开始播放,然后检查是否仍然在加载数据。

html
<audio id="example" preload="auto">
  <source src="sound.ogg" type="audio/ogg" />
</audio>
js
var obj = document.getElementById("example");

obj.addEventListener("playing", function () {
  if (obj.networkState === 2) {
    // Still loading...
  }
});

规范

Specification
HTML
# dom-media-networkstate-dev

浏览器兼容性

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
networkState

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support
See implementation notes.

参见