index.md

---

title: AudioNode.numberOfOutputs
slug: Web/API/AudioNode/numberOfOutputs
page-type: web-api-instance-property
browser-compat: api.AudioNode.numberOfOutputs

---

{{APIRef("Web Audio API")}}

The numberOfOutputs property of the {{ domxref("AudioNode") }} interface returns the number of outputs coming out of the node. Destination nodes — like {{domxref("AudioDestinationNode") }} — have a value of 0 for this attribute.

Value

An integer ≥ 0.

Examples

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

Specifications

{{Specifications}}

Browser compatibility

{{Compat}}

See also

• Using the Web Audio API