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Differences between jquery parent and parents

Source: Internet
Author: User
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First, let's talk about the differences between parent and parents.
Literally, it is not difficult to see
A parent is a set of elements that obtain a unique parent element that contains all matching elements.
Parents is a set of elements (excluding the root element) that contain the ancestor elements of all matching elements ). You can use an optional expression to filter data.
It can be seen that the value of parent is clear, that is, the parent element of the current element; parents is the ancestor element of the current element. The following are examples:
<Div id = 'div1 '>
<Div id = 'div2'> <p> </div>
<Div id = 'did3' class = 'A'> <p> </div>
<Div id = 'div4 '> <p> </div>
</Div>
$ ('P'). parent () obtains div2, div3, div4
$ ('P'). parent ('. A') obtains div3.
$ ('P'). parent (). parent () gets div1, which is odd. However, the characteristics of Jquery objects determine that this is feasible.
$ ('P'). parents () obtains div1, div2, div3, and div4.
$ ('P'). parents ('. A') obtains div3.
Parent (exp) usage: gets a set of elements that contain a unique parent element that matches all elements.
<Script src = "jquery-1.2.6.min.js" type = "text/javascript"> </script>
<Script type = "text/javascript">
$ (Document). ready (function (){
$ ("# Btn1"). click (function (){
Alert(%(this%.parent(%.next(%.html ());
});
});
</Script>
</Head>
<Body>
<Table>
<Tr>
<Td> <input id = "btn1" class = "btn" type = "button" value = "test"/> </td>
<Td> some text </td>
</Tr>
</Table>
....
Where:
This. parent () is the td before input
This. parent (). parent () gets tr
This. parent () obtains table
This. parent (). next () obtains the td
In the example:
<Div> <p> Hello </p> </div>
$ ("P "). parent () obtains the <div> <p> Hello </p> </div> object, because the parent label of the p tag is a div

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