drum-kit/app.js at main · bitbybrew/drum-kit · GitHub

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//Detecting a MouseClick event
var numberOfDrumButtons = document.querySelectorAll(".drum").length;
for (var i=0 ; i<numberOfDrumButtons ; ++i) {
    document.querySelectorAll("button")[i].addEventListener("click", function () {
        makeSound(this.innerHTML);
    });
}

//Detecting a Keyboard input event
document.addEventListener("keypress", function(event) {
    makeSound(event.key);
});

function makeSound(key) {
    buttonAnimation(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("Invalid Input");
                break;
    }
}

function buttonAnimation(currentKey) {
    var activeButton = document.querySelector("." + currentKey);
    activeButton.classList.add("pressed");
    setTimeout(() => {
       activeButton.classList.remove("pressed");
    }, 100);
}