<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="jquery-3.4.1.js"></script>
</head>
<body>
<div id="outer">
    <div id="div1" class="div">
        <input class="inp1" type="button" value="增加" onclick="func1(this)">
        <input class="inp2" type="text">
    </div>
</div>
</body>
<script>
    function func1(self)
    {
        var r=$("#outer");
        var ele=$(self).parent().clone();
        ele.children(":button").val("去除");
        ele.children(":button").attr("onclick","func2(this)");
        r.append(ele);
    }
    function func2(self)
    {
        var r=$(self).parent();
        r.remove();

    }
</script>
</html>

这个就是jQuery 的练习