HTML5 Audio Sprites

/**
 * @author    Pavle Goloskokovic <[email protected]> (http://prunegames.com)
 */
class Example extends Phaser.Scene
{
    constructor ()
    {
        super();
    }

    preload ()
    {
        this.load.setBaseURL('https://cdn.phaserfiles.com/v410');
        this.load.image('title', 'assets/pics/catastrophi.png');

        this.load.spritesheet('button', 'assets/ui/flixel-button.png', { frameWidth: 80, frameHeight: 20 });

        this.load.bitmapFont('nokia', 'assets/fonts/bitmap/nokia16black.png', 'assets/fonts/bitmap/nokia16black.xml');

        this.load.audioSprite('sfx', 'assets/audio/SoundEffects/fx_mixdown.json', [
            'assets/audio/SoundEffects/fx_mixdown.ogg',
            'assets/audio/SoundEffects/fx_mixdown.mp3'
        ]);
    }

    create ()
    {
        this.add.image(400, 300, 'title');

        const spritemap = this.cache.json.get('sfx').spritemap;

        let i = 0;
        for (let spriteName in spritemap)
        {
            if (!spritemap.hasOwnProperty(spriteName))
            {
                continue;
            }
            this.makeButton(spriteName, 680, 115 + i*40);
            i++;
        }

        this.input.on('gameobjectover', function (pointer, button)
        {
            this.setButtonFrame(button, 0);
        }, this);

        this.input.on('gameobjectout', function (pointer, button)
        {
            this.setButtonFrame(button, 1);
        }, this);

        this.input.on('gameobjectdown', function (pointer, button)
        {
            this.sound.playAudioSprite('sfx', button.name);
            this.setButtonFrame(button, 2);
        }, this);

        this.input.on('gameobjectup', function (pointer, button)
        {
            this.setButtonFrame(button, 0);
        }, this);

    }

    makeButton(name, x, y)
    {
        const button = this.add.image(x, y, 'button', 1)
            .setInteractive();
        button.name = name;
        button.setScale(2, 1.5);

        const text = this.add.bitmapText(x - 40, y - 8, 'nokia', name, 16);
        text.x += (button.width - text.width) / 2;
    }

    setButtonFrame(button, frame)
    {
        button.frame = button.scene.textures.getFrame('button', frame);
    }
}

const config = {
    scale: { mode: Phaser.Scale.FIT },
    type: Phaser.AUTO,
    parent: 'game-container',
    width: 800,
    height: 600,
    scene: Example,
    pixelArt: true,
    audio: {
        disableWebAudio: true
    }
};

const game = new Phaser.Game(config);