index.js

var n = document.querySelectorAll(".drum").length;

// Detecting Button Press
for (var i = 0; i < n; i++) {
  document.querySelectorAll(".drum")[i].addEventListener("click", function (){
    // alert("I got Clicked!!!");
    // this.style.color = "white";
    var d = this.innerText;
    makeSound(d);
    buttonAnimation(d);
  });

}



// Detecting Keyboard Press
document.addEventListener("keydown", function (event){
  // alert("Key is Pressed!!!");
  // console.log(event);
  makeSound(event.key);
  buttonAnimation(event.key)
}
);

function makeSound(key) {
  switch (key) {
    case 'w':
      var tom1 = new Audio("sounds/tom-1.mp3");
      tom1.play();
      break;

    case 'a':
      var tom2 = new Audio("sounds/tom-2.mp3");
      tom2.play();
      break;

    case 's':
      var tom3 = new Audio("sounds/tom-3.mp3");
      tom3.play();
      break;

    case 'd':
      var tom4 = new Audio("sounds/tom-4.mp3");
      tom4.play();
      break;

    case 'j':
      var snare = new Audio("sounds/snare.mp3");
      snare.play();
      break;

    case 'k':
      var crash = new Audio("sounds/crash.mp3");
      crash.play();
      break;

    case 'l':
      var kick = new Audio("sounds/kick-bass.mp3");
      kick.play();
      break;
    default:
      console.log(key);


  }
}

function buttonAnimation(currentKey)
{
  var activeButton = document.querySelector("." + currentKey);
  activeButton.classList.add("pressed");

  setTimeout(function (){
    activeButton.classList.remove("pressed");
  },100);
}



//
// function handleClick() {
//   alert("I got Clicked!!!");
// }