index.html

---
title: AudioNode.numberOfInputs
slug: Web/API/AudioNode/numberOfInputs
tags:
- API
- AudioNode
- Property
- Reference
- Web Audio API
- numberOfInputs
browser-compat: api.AudioNode.numberOfInputs
---
<div>{{APIRef("Web Audio API")}}</div>

<p>The <code>numberOfInputs</code> property of
    the {{domxref("AudioNode")}} interface returns the number of inputs feeding the
    node. Source nodes are defined as nodes having a <code>numberOfInputs</code>
  property with a value of 0.</p>

<h2 id="Syntax">Syntax</h2>

<pre
  class="brush: js">var <em>numInputs</em> = <em>audioNode</em>.numberOfInputs;</pre>

<h3 id="Value">Value</h3>

<p>An integer ≥ 0.</p>

<h2 id="Example">Example</h2>

<pre class="brush: js;">const audioCtx = new AudioContext();

const oscillator = audioCtx.createOscillator();
const gainNode = audioCtx.createGain();

oscillator.connect(gainNode).connect(audioCtx.destination);

console.log(oscillator.numberOfInputs); // 0
console.log(gainNode.numberOfInputs); // 1
console.log(audioCtx.destination.numberOfInputs); // 1
</pre>

<h2 id="Specifications">Specifications</h2>

{{Specifications}}

<h2 id="Browser_compatibility">Browser compatibility</h2>

<p>{{Compat}}</p>

<h2 id="See_also">See also</h2>

<ul>
  <li><a href="/en-US/docs/Web/API/Web_Audio_API/Using_Web_Audio_API">Using the Web Audio
      API</a></li>
</ul>