123

Pen Settings

CSS Base

Vendor Prefixing

Add External Stylesheets/Pens

Any URL's added here will be added as <link>s in order, and before the CSS in the editor. If you link to another Pen, it will include the CSS from that Pen. If the preprocessor matches, it will attempt to combine them before processing.

+ add another resource

You're using npm packages, so we've auto-selected Babel for you here, which we require to process imports and make it all work. If you need to use a different JavaScript preprocessor, remove the packages in the npm tab.

Add External Scripts/Pens

Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

+ add another resource

Use npm Packages

We can make npm packages available for you to use in your JavaScript. We use webpack to prepare them and make them available to import. We'll also process your JavaScript with Babel.

⚠️ This feature can only be used by logged in users.

Code Indentation

     

Save Automatically?

If active, Pens will autosave every 30 seconds after being saved once.

Auto-Updating Preview

If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

HTML Settings

Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

            
              <p>
  <button id="boton">&#9655;</button>
  <input id="progresoInput" type="range" value="0" />
</p>
            
          
!
            
              html,body{height:100vh; background:#d9d9d9;}
p{text-align:center;margin:0 auto; margin-top:calc(50vh - 2em); }
input{width:6em;}
button{width:3em; height:3em;}
            
          
!
            
              //Creamos un nuevo AudioContext.
// Safary y Opera todavía necesitan el prefijo webkit
var audioCtx = new (window.AudioContext || window.webkitAudioContext)();
var audioBuffer, fuenteDeReproduccion;
var stop = true;
var tiempo = 0, progreso=0;//,porcien = 0;

function solicitarAudio(url) {
  var request = new XMLHttpRequest();

  request.open("GET",url, true);
  // el objeto arraybuffer se utiliza para almacenar datos binarios (archivos de sonido)
  request.responseType = "arraybuffer";
  // si hay respuesta
  request.onload = function() {
    audioCtx.decodeAudioData(request.response, function(buffer) {
      audioBuffer = buffer;
    });
  };

  //envía la solicitud
  request.send();
}

function reproducirAudio(progreso) {
    //1. crea la fuente de reproducción
    fuenteDeReproduccion = audioCtx.createBufferSource();
    // 2. establece la fuente de reproducción
    fuenteDeReproduccion.buffer = audioBuffer;
    // 3. Establece el valor de algunas propiedades
    // la propiedad playbackRate establece o devuelve la velocidad de reproducción del audio.
    fuenteDeReproduccion.playbackRate.value = 1;
    // 4. Conecta la fuente de reproducción con su destino ( altavoces, auriculares . . . etc )
    fuenteDeReproduccion.connect(audioCtx.destination);
    // 5. Inicia la reproducción
    fuenteDeReproduccion.start(audioCtx.currentTime, progreso);
}

function detenerAudio() {
    fuenteDeReproduccion.stop();
}

function audio(){  
  if (stop) {// si el audio está parado
    tiempo = audioCtx.currentTime - progreso;
    stop = false;
    boton.innerHTML = "||";//detener
    reproducirAudio(progreso);
  }else{// de lo contrario
    stop = true;
    boton.innerHTML = "&#9655;";//reproducir
    detenerAudio();
  }
}

solicitarAudio(
  "https://s3-us-west-2.amazonaws.com/s.cdpn.io/222579/Kevin_MacLeod_-_Camille_Saint-Sans_Danse_Macabre_-_Finale.mp3"
);

// Utiliza el evento click para iniciar o detener la reproducción
boton.addEventListener("click", audio, false);

progresoInput.addEventListener(
  "input",
  function() {
   if(stop == true) {progreso = this.value * audioBuffer.duration / 100;}
  },
  false
);

window.setInterval( function(){ 
 // si el audio se está reproduciendo
 if(stop == false){
  // calcula el progreso del audio en segundos
  progreso = audioCtx.currentTime - tiempo;
  // calcula el progreso del audio en porcientos
  var porcien = progreso * 100 / audioBuffer.duration;
  // visualiza el progreso del audio
  progresoInput.value = porcien;
 } 
  
 if(audioBuffer && audioCtx.currentTime - tiempo >= audioBuffer.duration){
    stop = true;
    boton.innerHTML = "&#9655;"//reproducir
    progreso = 0;
 }
},1000/30);


            
          
!
999px
🕑 One or more of the npm packages you are using needs to be built. You're the first person to ever need it! We're building it right now and your preview will start updating again when it's ready.

Console