效果图如下（输入姓名和密码在下方表格中显示）
代码如下
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport"
content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<script src="./lib/jquery-3.3.1.min.js"></script>
</head>
<body>
<div>
姓名：<input type="text" class="name">
密码：<input type="text" class="password">
</div>
<button>提交</button>
<table border="1">
<tr>
<td>姓名</td>
<td>密码</td>
</tr>
</table>
</body>
<script>
$(function () {
$('button').click(function () {
// console.log(232)
let name = $(this).siblings("div").find(".name").val()
// console.log(name)
let password = $(this).siblings("div").find(".password").val()
$(this).siblings("div").find(".name").val('')
$(this).siblings("div").find(".password").val('')
var $tr = $("tr:first").clone()
if(name&&password){
$('table').append($tr)
$('table tr:last').find('td:first').html(name)
$('table tr:last').find('td:last').html(password)
}
})
})
</script>
</html>