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36 lines (33 loc) · 964 Bytes
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<!DOCTYPE html>
<html lang="ko">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta http-equiv="X-UA-Compatible" content="ie=edge" />
<title>Lotto</title>
</head>
<body>
<h1>로또번호 추첨기</h1>
<button onclick="getLuckyNumber()">생성하기</button>
<div id="LOTTO"></div>
<script>
var LOTTO = document.getElementById("LOTTO");
// 로또 번호 추첨 함수
function getLuckyNumber() {
var numbers = [];
while (numbers.length < 6) {
var newNumber = genLottoNo();
if (numbers.indexOf(newNumber) < 0) {
// 중복검사
numbers.push(newNumber);
}
}
LOTTO.innerHTML = numbers.join(" ");
}
// 랜덤 번호 생성 함수
function genLottoNo() {
return Math.floor(Math.random() * 45) + 1;
}
</script>
</body>
</html>