const insert = document.getElementById('insert');

window.addEventListener('keydown', (e) => {

insert.innerHTML = `<ul>

<li class="key">

${e.key === ' ' ? 'Space' : e.key}

<small>event.key</small>

</li>

<li class="key">

${e.keyCode}

<small>event.keyCode</small>

</li>

<li class="key">

${e.code}

<small>event.code</small>

</li>

</ul>`;

console.log(e);

});