What are jquery selectors?

Basic Selector

$("pId")id选择器$("a")  
元素选择器$(".class1")  
类选择器$("*")  
所有选择器$("#pId,a,.class2")  ","间隔

Hierarchical Selector

$(.class p)子代
$(.class>li)直接子结点
$(#id+img)id后面的img
$(#id~[title])带有title属性的id

Basic Filter

$("tr:first")tr第一行
$("tr:last")tr最后一行
$("input:not(:chose)")查找所有未选中的input
$("tr:even")奇数行$("tr:odd")偶数行
$("tr:eq(1)")查找tr的第二行
$("tr:qt()")大于索引值
$("tr:lt()")小于索引值
$(":header")选择所有h1，h2,h3一类的header

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