<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<form action=""></form>
<script>
let num = prompt("请输入想要创建的checkbox的个数");
let form = document.getElementsByTagName("form")[0];
let body = document.getElementsByTagName("body")[0];
createCheckbox(num);
function createCheckbox(n) {
for(let i = 0; i < n; i ++) {
let input = document.createElement("input");
input.setAttribute("type", "checkbox");
body.appendChild(input);
}
}
</script>
</body>
</html>