Script for Audio Context Tutorial at my medium account (https://medium.com/@muhibbudins)

script.js

  const
    source = document.getElementById('source'),
    player = document.getElementById('player'),
    canvas = document.getElementById('visualizer'),
    name   = document.getElementById('song_name'),
    format = document.getElementById('song_format'),
    blob   = window.URL || window.webkitURL,
    color  = ['#1abc9c','#2ecc71','#3498db','#9b59b6','#34495e','#16a085','#27ae60','#2980b9','#8e44ad']; 
  
  // Check if blob is exist in this browser
  if (!blob) {
    console.warn('Your browser does not support Blob URLs.');
  }