AudioContext.onstatechange

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since April 2021.

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AudioContext 的 onstatechange 属性定义了一个事件处理器函数，触发 statechange 会被调用，也就是说 audio context 的状态发生变化时会执行。

语法

js
var audioCtx = new AudioContext();
audioCtx.onstatechange = function() { ... };

例子

下面这段代码是AudioContext states DEMO (直接运行) 中的，其中 onstatechange 处理器会在每次当前 state 发生变化时把它输出到控制台。

js
audioCtx.onstatechange = function () {
  console.log(audioCtx.state);
};

规范

Specification
Web Audio API
# dom-baseaudiocontext-onstatechange

浏览器兼容性

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参见