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() Functional filtering and searching
Get all the title objects under the DIV: $ ("Div: Header ")CopyCodeThe Code is as follows: <body>
<H3> AAA <P> BBB </P>
<H4> CCC </H4>
<Div>
<H3> DDD <P> EEE </P>
<H4> fff </H4>
</Div>
</Body>
Get all title objects: $ (": Header ")Copy codeThe Code is as follows: <body>
<H3> AAA <P> BBB </P>
<H4> CCC </H4>
<Div>
<H3> DDD <P> EEE </P>
<H4> fff </H4>
</Div>
</Body>
get first, for example, $ ("Li: First") or $ ("Li "). first () or $ ("Ul: First") or $ ("Ul Li: First") copy Code the code is as follows:
get the first of each group, for example, $ ("Li: First-Child"), $ ("Ul Li: First-Child"), or $ ("Ul: first-Child ") copy Code the code is as follows:
get the last, for example, $ ("Li: Last") or $ ("Li "). last () or $ ("Ul: Last") or $ ("Ul Li: Last") copy Code the code is as follows:
get the last of each group, for example, $ ("Li: Last-Child"), $ ("Ul Li: Last-Child"), or $ ("Ul: last-Child ") copy Code the code is as follows:
obtain the nth number, for example, (obtain the third and start with 0 eq): $ ("Li: eq (2)") or $ ("Li "). eq (2) copy Code the code is as follows:
obtain the number after the first digit, for example, (if the number after the third digit is obtained, the value of GT starts from 0): $ ("Li: GT (2 )") copy Code the code is as follows:
obtain the first few items, for example, (the value starting from 0 before the third item is obtained): $ ("Li: Lt (2 )") copy Code the code is as follows:
obtain an even number of index values, for example, (0 for even): $ ("Li: Even") copy Code the code is as follows:
the retrieved index value is odd, for example, (odd starts from 0): $ ("Li: odd") copy Code the code is as follows:
obtain the even number of each group, for example, (Nth-child is 1): $ ("Li: Nth-child (even)") copy Code the code is as follows:
obtain the odd number of each group, for example, (Nth-child starts with 1): $ ("Li: Nth-child (ODD)") copy Code the code is as follows:
obtain the number of each group, for example, 2nd (starting with Nth-child): $ ("Li: Nth-child (2 )") copy Code the code is as follows:
use an expression to indicate the number of each group. For example, (Nth-child is 1): $ ("Li: Nth-child (3n-1 )") copy Code the code is as follows:
if it is a unique child element in the parent element, for example, $ ("Li: Only-Child") copy Code the code is as follows:
: Not indicates the inverse of other options, for example, $ ("Li: Not (Li: First-child)") copy Code the code is as follows:
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