The numberOfOutputs
property of the AudioNode
interface returns the number of outputs coming out of the node. Destination nodes — like AudioDestinationNode
— have a value of 0 for this attribute.
var numOutputs = audioNode.numberOfOutputs;
An integer ≥ 0.
const audioCtx = new AudioContext(); const oscillator = audioCtx.createOscillator(); const gainNode = audioCtx.createGain(); oscillator.connect(gainNode).connect(audioCtx.destination); console.log(oscillator.numberOfOutputs); // 1 console.log(gainNode.numberOfOutputs); // 1 console.log(audioCtx.destination.numberOfOutputs); // 0
Specification | Status | Comment |
---|---|---|
Web Audio API The definition of 'numberOfOutputs' in that specification. | Working Draft |
Feature | Chrome | Edge | Firefox | Internet Explorer | Opera | Safari |
---|---|---|---|---|---|---|
Basic support | 14 | Yes | 25 | No | 15 | 6 |
Feature | Android webview | Chrome for Android | Edge mobile | Firefox for Android | IE mobile | Opera Android | iOS Safari |
---|---|---|---|---|---|---|---|
Basic support | Yes | 14 | Yes | 26 | No | 15 | ? |
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https://developer.mozilla.org/en-US/docs/Web/API/AudioNode/numberOfOutputs