元素的jQuery标签名称

我试图在jQuery中获取一个元素标签名称.

I'm try to get an elements tag name in jQuery.

我有以下html:

<div class="section" id="New_Revision">

    <h1>New Revision&nbsp<img alt="Lock_closed" class="edit" data-id="1" src="/assets/lock_closed.svg" /></h1>

    <p>This is a test paragraph.</p>

    <ol class="references">
      <li>test</li>
    </ol>
</div>

和javascript:

And javascript:

$(".edit").click(function(){
    $(this).closest("div.section").children().each(function(){
        alert($(this).tagName + " - " + $(this).html());
    });     
})

我已经尝试过$(this).tagName，$(this).nodeName和$(this).attr("tag")，如以下问题所述:

I've tried $(this).tagName, $(this).nodeName and $(this).attr("tag") as noted in this question: Can jQuery provide the tag name?

但是我总是得到undefined作为回报. html()正确输出.为什么无法获取每个元素的标签名称?

But I'm always getting undefined in return. The html() outputs correctly. Why can't I get the tag name of each element?