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HTML 

              
                <div id='app'></div>
!

CSS 

              
                .grid-container {
  display: grid;
  grid-template-columns: repeat(3, 1fr); /* Creates 3 equal-width columns */

  padding: 20px; /* Adds padding around the grid container */
}

.grid-item {
  background-color: #e0e0e0;
  padding: 20px;
  text-align: center;
}
!

JS 

              
                import React from "https://esm.sh/react@18.2.0";
import ReactDOM from "https://esm.sh/react-dom@18.2.0";

const heaterSoundsGroup = [
  {
    keyCode: 81,
    key: "Q",
    id: "Heater-1",
    url: "https://s3.amazonaws.com/freecodecamp/drums/Heater-1.mp3"
  },
  {
    keyCode: 87,
    key: "W",
    id: "Heater-2",
    url: "https://s3.amazonaws.com/freecodecamp/drums/Heater-2.mp3"
  },
  {
    keyCode: 69,
    key: "E",
    id: "Heater-3",
    url: "https://s3.amazonaws.com/freecodecamp/drums/Heater-3.mp3"
  },
  {
    keyCode: 65,
    key: "A",
    id: "Heater-4",
    url: "https://s3.amazonaws.com/freecodecamp/drums/Heater-4_1.mp3"
  },
  {
    keyCode: 83,
    key: "S",
    id: "Clap",
    url: "https://s3.amazonaws.com/freecodecamp/drums/Heater-6.mp3"
  },
  {
    keyCode: 68,
    key: "D",
    id: "Open-HH",
    url: "https://s3.amazonaws.com/freecodecamp/drums/Dsc_Oh.mp3"
  },
  {
    keyCode: 90,
    key: "Z",
    id: "Kick-n'-Hat",
    url: "https://s3.amazonaws.com/freecodecamp/drums/Kick_n_Hat.mp3"
  },
  {
    keyCode: 88,
    key: "X",
    id: "Kick",
    url: "https://s3.amazonaws.com/freecodecamp/drums/RP4_KICK_1.mp3"
  },
  {
    keyCode: 67,
    key: "C",
    id: "Closed-HH",
    url: "https://s3.amazonaws.com/freecodecamp/drums/Cev_H2.mp3"
  }
];

const smoothPianoSoundsGroup = [
  {
    keyCode: 81,
    key: "Q",
    id: "Chord-1",
    url: "https://s3.amazonaws.com/freecodecamp/drums/Chord_1.mp3"
  },
  {
    keyCode: 87,
    key: "W",
    id: "Chord-2",
    url: "https://s3.amazonaws.com/freecodecamp/drums/Chord_2.mp3"
  },
  {
    keyCode: 69,
    key: "E",
    id: "Chord-3",
    url: "https://s3.amazonaws.com/freecodecamp/drums/Chord_3.mp3"
  },
  {
    keyCode: 65,
    key: "A",
    id: "Shaker",
    url: "https://s3.amazonaws.com/freecodecamp/drums/Give_us_a_light.mp3"
  },
  {
    keyCode: 83,
    key: "S",
    id: "Open-HH",
    url: "https://s3.amazonaws.com/freecodecamp/drums/Dry_Ohh.mp3"
  },
  {
    keyCode: 68,
    key: "D",
    id: "Closed-HH",
    url: "https://s3.amazonaws.com/freecodecamp/drums/Bld_H1.mp3"
  },
  {
    keyCode: 90,
    key: "Z",
    id: "Punchy-Kick",
    url: "https://s3.amazonaws.com/freecodecamp/drums/punchy_kick_1.mp3"
  },
  {
    keyCode: 88,
    key: "X",
    id: "Side-Stick",
    url: "https://s3.amazonaws.com/freecodecamp/drums/side_stick_1.mp3"
  },
  {
    keyCode: 67,
    key: "C",
    id: "Snare",
    url: "https://s3.amazonaws.com/freecodecamp/drums/Brk_Snr.mp3"
  }
];

const soundsGroup = [
  {
    name: "Heater Kit",
    sounds: heaterSoundsGroup
  },
  {
    name: "Smooth Piano Kit",
    sounds: smoothPianoSoundsGroup
  }
];

const DrumMachine = ({ soundGroup, handleChangeGroup }) => {
  const [soundName, setSoundName] = React.useState("");

  const handleSoundClick = (key, id) => {
    setSoundName(id);
    const audio = document.getElementById(key);
    audio.parentElement.style.backgroundColor = "#000000";
    audio.currentTime = 0;
    audio.play();
    setTimeout(() => {
      audio.parentElement.style.backgroundColor = "blue";
    }, 230);
  };

  React.useEffect(() => {
    setSoundName(soundGroup.name);
  }, [soundGroup]);
  return (
    <div
      id="drum-machine"
      className=" border border-2 border-dark shadow px-3 py-3 rounded rounded-3 d-flex align-items-center justify-content-between"
      style={{ width: "350px" }}
    >
      <Keyboard
        sounds={soundGroup.sounds}
        handleSoundClick={handleSoundClick}
      />
      <Control name={soundName} handleChangeGroup={handleChangeGroup} />
    </div>
  );
};

const KeyboardKey = ({ sound, handleSoundClick }) => {
  const handleKeyDown = (e) => {
    if (sound.keyCode === e.keyCode) {
      handleSoundClick(sound.key, sound.id);
    }
  };
  React.useEffect(() => {
    document.addEventListener("keydown", handleKeyDown);
  }, []);
  return (
    <div
      id={sound.id}
      className="drum-pad py-3 px-3 border-1 border dark d-flex justify-content-center align-items-center shadow border-dark m-1 row grid-item rounded rounded-pill"
      onClick={() => handleSoundClick(sound.key, sound.id)}
      style={{
        width: "50px",
        height: "50px",
        color: "#ffffff",
        backgroundColor: "blue"
      }}
    >
      <audio src={sound.url} id={sound.key} className="clip" />
      {sound.key}
    </div>
  );
};

const Keyboard = ({ sounds, handleSoundClick }) => {
  return (
    <div className="grid-container">
      {sounds.map((sound, index) => {
        return (
          <KeyboardKey sound={sound} handleSoundClick={handleSoundClick} />
        );
      })}
    </div>
  );
};

const Control = ({ name, handleChangeGroup }) => {
  return (
    <div>
      <span id="display" className="btn btn-dark " onClick={handleChangeGroup}>
        {name}
      </span>
    </div>
  );
};
const App = () => {
  const [currentGroupIndex, setCurrentGroupIndex] = React.useState(0);

  const handleChangeGroup = () => {
    setCurrentGroupIndex((currentGroupIndex + 1) % soundsGroup.length);
  };

  return (
    <div className="min-vh-100 d-flex flex-column justify-content-center align-items-center">
      <h1 className="h1">Drum Machine</h1>
      <DrumMachine
        soundGroup={soundsGroup[currentGroupIndex]}
        handleChangeGroup={handleChangeGroup}
      />
    </div>
  );
};

ReactDOM.render(<App />, document.querySelector("#app"));
!
999px

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