网络音频API | AudioNode numberOfInputs 属性

AudioNode.numberOfInputs 属性用于返回馈送节点的输入数。 Source 节点用于定义为包含值为零的 numberOfInputs 属性的节点。

句法：

var numInputs = audioNode.numberOfInputs;

返回值：它返回一个大于等于零的整数值。

示例 1：

 
 
   
 
     
        Web Audio API | AudioNode numberOfInputs property
    
 
   
 
       
     
        GeeksforGeeks
    
       
    
        AudioNode numberOfInputs property
    
       
    
       
        // Create new Audio context
        const audioContext = new AudioContext();
           
        // Create an OscillatorNode 
        const oscillator = audioContext.createOscillator();
          
        // Create a gainNode
        const gainNode = audioContext.createGain();
            
        oscillator.connect(gainNode).connect(audioContext.destination);
           
        // Display the numberOfOutputs in console view
        console.log(oscillator.numberOfInputs);
    

   
                   

输出：

示例 2：

 
 
   
 
     
        Web Audio API | AudioNode numberOfInputs property
    
 
   
 
       
     
        GeeksforGeeks
    
       
    
        AudioNode numberOfInputs property
    
       
    
       
        // Create new Audio context
        const audioContext = new AudioContext();
           
        // Create an OscillatorNode 
        const oscillator = audioContext.createOscillator();
          
        // Create a gainNode
        const gainNode = audioContext.createGain();
            
        oscillator.connect(gainNode).connect(audioContext.destination);
           
        // Display the numberOfOutputs in console view
        console.log(gainNode.numberOfInputs);
    

   
                   

输出：

示例 3：

 
 
   
 
     
        Web Audio API | AudioNode numberOfInputs property
    
 
   
 
       
     
        GeeksforGeeks
    
       
    
        AudioNode numberOfInputs property
    
       
    
       
        // Create new Audio context
        const audioContext = new AudioContext();
           
        // Create an OscillatorNode 
        const oscillator = audioContext.createOscillator();
          
        // Create a gainNode
        const gainNode = audioContext.createGain();
            
        oscillator.connect(gainNode).connect(audioContext.destination);
           
        // Display the numberOfOutputs in console view
        console.log(audioContext.destination.numberOfInputs);
    

   
                   

输出：

支持的浏览器： AudioNode.numberOfInputs 属性支持的浏览器如下：

• 谷歌浏览器 14.0
• 边缘 12.0
• 火狐 25.0
• Safari 6.0
• 歌剧 15.0