Volonter,
тоже самое, вариант попроще для понимания...
<!DOCTYPE html>
<html>
<head>
<title>Untitled</title>
<meta charset="utf-8">
<style type="text/css">
.ticket-block {
display: flex;
width: 20em;
}
.ticket-item {
text-align: center;
font-size: 3em;
border: 1px solid #000080;
width: 100%;
}
</style>
</head>
<body>
<input id="tcount" name="" type="number" min="1" max="6" value="2">
<input id="createTicketsButton" name="" type="button" value="createTickets" onclick="createTickets()">
<div id="ticketslist"></div>
<script>
function createTickets() {
let tcount = +document.getElementById('tcount').value;
let numbers = generate(36);
let limit = 6;
let ticket = ''
for (t = 0; t < tcount; t++) {
if(numbers.length < limit) break;
let ticketItem = '';
numbers.splice(0,6).forEach(n => {
ticketItem += `<div class="ticket-item" data-select="${n}">${n}</div>`
})
ticket += `<div class="ticket-block">${ticketItem}</div>`
}
ticketslist.insertAdjacentHTML('beforeend', ticket);
createTicketsButton.disabled = true
}
function generate(length) {
let arr = Array(length);
for (let i = 0; i < length; i++) {
let k = Math.floor(Math.random() * length);
let num = arr[k] || k + 1;
arr[k] = arr[i] || i + 1;
arr[i] = num;
}
return arr
}
</script>
</body>
</html>