In the end, what i needed to do was to, instead of adding the event to the body, add the event to the text-box itself, that way, only when you click on the box it will keylog what you type, the final Js i had was this:
document.getElementById("Texto").addEventListener('keyup', function(event) {
document.getElementById("Resultado").innerHTML+=(event.key);
document.getElementById("Resultado2").innerHTML+=(event.keyCode+", ");
})
<body>
<div id="Wrapper">
<br>
<h1>Key and Unicode Translator</h1>
<input type="text" placeholder="Texto" id="Texto">
<br><br>
<div id="Resultado"></div>
<br>
<div id="Resultado2"></div>
<br>
</div>
</body>