今天遇到一个问题需要获取tagName，使用jquery，查询了一下，大家说用$("dd").attr("tagName")能获取到，但是得到的返回值是undefined，于是又查询饿了许久，返回遍历了一下jquery封装的对象
复制代码 代码如下:
$("dd").bind("click",function(e){
var $obj = $(e.target);
var i=0;
for (var x in $obj){
i++;
var $hr=(i%5==0) ? "<hr />" : " ";
document.write(x+" "+$hr);
}
});
遍历结果：
0 length prevObject context selector
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constructor init jquery size toArray
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get pushStack each ready eq
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first last slice map end
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push sort splice extend data
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removeData queue dequeue delay clearQueue
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promise attr removeAttr prop removeProp
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addClass removeClass toggleClass hasClass val
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bind one unbind delegate undelegate
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trigger triggerHandler toggle hover live
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die blur focus focusin focusout
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load resize scroll unload click
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dblclick mousedown mouseup mousemove mouseover
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mouseout mouseenter mouseleave change select
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submit keydown keypress keyup error
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find has not filter is
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closest index add andSelf parent
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parents parentsUntil next prev nextAll
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prevAll nextUntil prevUntil siblings children
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contents text wrapAll wrapInner wrap
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unwrap append prepend before after
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remove empty clone html replaceWith
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detach domManip appendTo prependTo insertBefore
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insertAfter replaceAll css serialize serializeArray
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ajaxStart ajaxStop ajaxComplete ajaxError ajaxSuccess
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ajaxSend show hide _toggle fadeTo
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animate stop slideDown slideUp slideToggle
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fadeIn fadeOut fadeToggle offset position
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offsetParent scrollLeft scrollTop innerHeight outerHeight
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height innerWidth outerWidth width
再遍历：
复制代码 代码如下:
$("dd").bind("click",function(e){
var $obj = $(e.target);
var i=0;
for (var x in $obj[0]){
i++;
var $hr=(i%5==0) ? "<hr />" : " ";
document.write(x+" "+$hr);
}
});
遍历结果：
querySelector querySelectorAll scrollTop scrollLeft scrollHeight
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scrollWidth clientTop clientLeft clientHeight clientWidth
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firstElementChild lastElementChild previousElementSibling nextElementSibling childElementCount
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children classList setCapture getElementsByClassName getClientRects
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getBoundingClientRect releaseCapture mozMatchesSelector addEventListener removeEventListener
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dispatchEvent style contentEditable isContentEditable offsetParent
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innerHTML offsetLeft offsetTop offsetHeight offsetWidth
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scrollIntoView id title lang dir
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className accessKey blur focus click
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tagName removeAttributeNS removeAttribute getAttribute getElementsByTagName
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setAttribute getElementsByTagNameNS hasAttributeNS setAttributeNS hasAttribute
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getAttributeNS nodeName nodeValue nodeType parentNode
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childNodes firstChild lastChild previousSibling nextSibling
--------------------------------------------------------------------------------
attributes ownerDocument namespaceURI prefix localName
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baseURI textContent setUserData getUserData insertBefore
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replaceChild removeChild appendChild hasChildNodes cloneNode
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normalize isSupported hasAttributes compareDocumentPosition isSameNode
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lookupPrefix isDefaultNamespace lookupNamespaceURI isEqualNode getAttributeNode
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setAttributeNode removeAttributeNode getAttributeNodeNS setAttributeNodeNS ELEMENT_NODE
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ATTRIBUTE_NODE TEXT_NODE CDATA_SECTION_NODE ENTITY_REFERENCE_NODE ENTITY_NODE
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PROCESSING_INSTRUCTION_NODE COMMENT_NODE DOCUMENT_NODE DOCUMENT_TYPE_NODE DOCUMENT_FRAGMENT_NODE
--------------------------------------------------------------------------------
NOTATION_NODE DOCUMENT_POSITION_DISCONNECTED DOCUMENT_POSITION_PRECEDING DOCUMENT_POSITION_FOLLOWING DOCUMENT_POSITION_CONTAINS
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DOCUMENT_POSITION_CONTAINED_BY DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC hidden tabIndex draggable
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spellcheck dataset
于是用$("dd")[0].tagName 可以获得tagName.
参考：
然后与$("a")遍历的结果对比
复制代码 代码如下: