An article takes you to get started and understand the basic operation of Jquery

Directory 1. Steps to use Jquery: (1) Import js library (2) Page load event 2. Transformation of Jq object and js object (1) js object---- > jq Object (2) jq Object-- > js Object 3. Basic selector for jq//(1) id selector for jq//(2) class selector for jq//(3) Form selector//(4) element selector 4. Level selector for jq 5. Filter selector 6. Attribute selector 7. Summary of jq document processing

1. Steps to use Jquery:

(1) Import the js library

<script src="js/jquery-1.11.3.min.js"></script>​
//js/jquery-1.11.3.min.js    Compressed version ( Recommend )
//js/jquery-1.11.3.js        Full version 

(2) Page Load Events

$(document).ready(function(){
     Business operations  ;
});​
// After optimization :
$(function(){
     Business operations ;
});

2. Conversion of Jq objects to js objects

(1) js Object---- > jq Object

var js Object  = document.getElementById("id Attribute value ");
var $jq Object  = $(js Object )

(2) jq Object-- > js Object

var js Object  = $jq Object .get(index) ;

3. Basic selector of 3. jq

//(1) id selector for jq

$("#id Attribute value "). Bind event method (function(){
     Business operations  ;
});

//(2) class selector for jq

$("#.class Attribute value "). Bind event method (function(){
     Business operations  ;
});

//(3) Form selector

$(" Selected input Label [ Label with specified attribute ]"). Bind event method (function(){
     Business operations  ;
});

//(4) element selector

$(" Element / Label ").html("XXX") ;

4. Level selector of 4. jq

// Descendant selector 
$(" Parent tag   Sub-label ")
​
// Child element selector 
$(" Parent element > Child element ")

5. Filter selector

$(" Label :first")               // Matches the number 1 Tags 
$(" Label :even")                // Matches from the 0 Starting even number of tags (0,2,4...)
$(" Label :odd")                 // Matches from the 1 Beginning odd number of elements (1,3,5...)

6. Property selector

$(document).ready(function(){
     Business operations  ;
});​
// After optimization :
$(function(){
     Business operations ;
});

0

7. jq document processing

$(document).ready(function(){
     Business operations  ;
});​
// After optimization :
$(function(){
     Business operations ;
});

1

Summarize

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