JSFiddle - React, Tailwind, and code Playground

HTML

<html lang="DE"><head>
<title> TEST </title>
</head>
<body>
<label for="0"><input type="number" id="0" min="1" max="6" class="card"></label>
<label for="1"><input type="number" id="1" min="1" max="6" class="card"></label>
<label for="2"><input type="number" id="2" min="1" max="6" class="card"></label>
<label for="3"><input type="number" id="3" min="1" max="6" class="card"></label>
<label for="4"><input type="number" id="4" min="1" max="6" class="card"></label>
<p>
<button id="start" onclick="pruefeEintrag()">prüfe FullHouse</button>
</p><div id="ausgabe">.</div>

</body></html>

CSS

body{background: #243269;}

input {
width: 70px;
height: 30px;
margin: 10px;
font-family: Verdana;
font-size: 20px;
font-weight: bold;
text-align: left;
}

#ausgabe{
color: white;
font-family: Verdana;
font-size: 20px;
font-weight: normal;
text-align: left;
}

button{
width: 140px;
height: 40px;
}

JavaScript

const Hands = Object.freeze({
	"None": 0,
	"FiveOfAKind": 1,
  "FullHouse": 2
});

const handsTxt = [];
handsTxt[Hands.None] = ".";
handsTxt[Hands.FiveOfAKind] = "Alle gleich";
handsTxt[Hands.FullHouse] = "FullHouse";


function pruefeEintrag()
{
	let txt = "Invalid input";
  let values = [];
  let inputs = document.querySelectorAll(".card");
  for (let i = 0; i < inputs.length; i++) {
    let v = inputs[i].value.length ? inputs[i].value * 1 : NaN;
    if (Number.isInteger(v)) {
    	values.push(v);
    } else {
    	break;
    }
  }
  if (values.length == 5) {
  	txt = handsTxt[getHand(values)];
  }
  document.getElementById('ausgabe').innerHTML = txt;	
}

function getHand(values)
{
	values.sort(function(a, b) {
  	return a - b;
  });
  
  let ret = Hands.None;
  if (isFiveOfAKind(values)) {
  	ret = Hands.FiveOfAKind;
  } else if (isFullHouse(values)) {
  	ret = Hands.FullHouse;
  }
	return ret;
}

function isFiveOfAKind(values)
{
	return values[0] == values[1] &&
  	values[1] == values[2] &&
    values[2] == values[3] &&
    values[3] == values[4];
}

function isFullHouse(values)
{
	let ret = values[0] == values[1] &&
  	values[1] == values[2] &&
    values[3] == values[4];
  if (!ret) {
  	ret |= values[0] == values[1] &&
    	values[2] == values[3] &&
   	 	values[3] == values[4];
  }
  return ret;
}