<body>
    <button onclick="Elem_1(this)">Elem_1</button>
    <hr>
    <button onclick="Elem_2($(this))">Elem_2</button>
</body>
</html>
<script src="assets/js/package/jquery.js"></script>
<script>
    function Elem_1(el) {
        console.log(typeof el)
        console.log(el)
    }
    function Elem_2(el) {
       console.log(typeof el)
        console.log(el)
    }
</script>

结果:Elem_1: <button onclick="Elem_1(this)">Elem_1</button>

Elem_1类型: object

结果：Elem_2： [button, context: button]

Elem_2类型: object

它们的区别是什么...?