Summary of jQuery's powerful selectors_jquery

A basic selector
$("input"): Select all elements with input tags
$("#input1"): Select the element with the id of input1
$(" .acss"): Select all
codes that contain acss this css class style

Copy the code The code is as follows:

link

< input id="Text1" class="acss">

<script> <br>var oo = $("input"); //oo is The set of the above 3<br>var pp = $("#input1");//pp is the first one<br>var qq = $(".acss");//qq is the set of the first two<br></script>

You can use the above 3 combined queries
var ww = $("input.acss"); / /Select the input tag element with acss
var ee = $("input#Text1.acss");//Select the input tag element with acss ID of Text1
2. Sub-selection
The parent node and the direct child node are separated by (>), that is, the child selector method is implemented

Copy code The code is as follows:

< /a>


< ;/a>

< ;script>
var oo = $("p a "); //Selected all a below p
var pp = $("p>a"); //Selected 2 a elements, The ids are a1 and a2
var qq = $("p.acss a"); //The element with id a1 is selected

3. Feature selector
Select a[href^=http://]
Code

Copy code The code is as follows:

< script>
var oo = $("a[href^=http://]"); //Select a whose href starts with http://. a3 selects
var pp = $("input[name$=Input]"); //Select the input whose name ends with Input. Text3, Text4 selected
var qq = $("a[href*=com]"); //Select href to include a of com. a3, a4 are selected
var ww = $("input[id=Text3]"); //Select exactly equal to

In addition, jQuery also provides the has method, as in the above example,
div:has(input) means.Select all divs containing input
Note: div input selects all input elements in the div
4. Position selector
The position selector is mainly based on the position of the element. Select,
div a:first returns the first a in the div on the page
div a last returns the last a in the div on the page
div odd returns the div at the even position on the page
div even Return the idv of the odd position on the page
div first-child Returns the first child selection in the div
div last-child Returns the last child selection in the div
only-child element without sibling nodes
nth -child(n): nth child node
eq(n) nth matching element
gt(n) matching elements after n do not contain
lt(n) matching elements before n do not contain
5. jQuery custom selection

名称	说明	解释
:input	匹配所有 input, textarea, select 和 button 元素	查找所有的input元素:  $(":input")
:text	匹配所有的文本框	查找所有文本框:  $(":text")
:password	匹配所有密码框	查找所有密码框:  $(":password")
:radio	匹配所有单选按钮	查找所有单选按钮
:checkbox	匹配所有复选框	查找所有复选框:  $(":checkbox")
:submit	匹配所有提交按钮	查找所有提交按钮:  $(":submit")
:image	匹配所有图像域	匹配所有图像域:  $(":image")
:reset	匹配所有重置按钮	查找所有重置按钮:  $(":reset")
:button	匹配所有按钮	查找所有按钮:  $(":button")
:file	匹配所有文件域	查找所有文件域:  $(":file")

名称	说明	解释
:enabled	匹配所有可用元素	Find all available input elements: $("input:enabled")
:disabled	Match all unavailable elements	Find all disabled input elements: $("input:disabled")
:checked	Matches all selected selected elements (check boxes, radio buttons, etc., excluding options in select)	Find all checked checkbox elements: $("input:checked")
:selected	Matches all selected option elements	Find all selected option elements: $("select option:selected")