代码如下:
<p id="test1">
<span>text1</span>
<span>text2</span>
<span>text3</span>
</p>
. 代码如下:
$("selector")[0] // accesses the first dom element in this jquery object
$("selector").get(0) // equivalent to the code above
$("selector").get() // retrieve a true array of dom elements matched by this selector
. 代码如下:
document.getelementsbytagname("p") // return htmlcollection
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offset、client、scroll (width,height、left,top、X,Y)
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