jQuery
一、jquery是什么
1.1 jquery基础
-
1.为什么要用jquery?
写起来简单,省事,开发效率高,兼容性好 -
2、什么是jQuery?
jQuery是一个兼容多浏览器的JavaScript库(类似python里面的模块) -
3、如何使用jQuery?
1、导入 <script src="jquery-3.2.1.js"></script>
或者<script src="jquery-3.2.1.min.js"></script>
2、语法规则:$("")
- .min.xx
压缩的:生产环境用
- 没有压缩的(没有.min.xx):开发用
-
4、JS和jQuery的区别?
jQuery就是一个Js库
js是基础,jQuery是工具 -
5、jQuery介绍
1.x:兼容ie678,使用最为广泛的,最终版本:1.12.4 (2016年5月20日)
2.x:不兼容ie678,很少有人使用,如果不考虑兼容低版本的浏览器可以使用2.x,最终版本:2.2.4 (2016年5月20日)
3.x:不兼容ie678,只支持最新的浏览器。很多老的jQuery插件不支持这个版本。最新版本:3.3.1(2018年3月16日)
1.2 什么是jquery对象?
- jQuery 对象就是通过jQuery包装DOM对象后产生的对象。
- jQuery 对象是 jQuery 独有的. 如果一个对象是 jQuery 对象, 那么它就可以使用 jQuery 里的方法: $(“#test”).html();
比如:
$("#test").html() 意思是指:获取ID为test的元素内的html代码。其中html()是jQuery里的方法
这段代码等同于用DOM实现代码: document.getElementById(" test ").innerHTML;
虽然jQuery对象是包装DOM对象后产生的,但是jQuery无法使用DOM对象的任何方法,同理DOM对象也不能使用jQuery里的方法.乱使用会报错
约定:如果获取的是 jQuery 对象, 那么要在变量前面加上$.
var $variable = jQuery 对象
var variable = DOM 对象
基本语法:$(selector).action()
二、寻找元素(重要的选择器和筛选器)
2.1 选择器
2.1.1 基本选择器
$("*") ---所有标签
$("#id") ---传入id的值
$(".class") ---传入class的值
$("element") ---传入标签名,如$("div")
$(".class,#id,div") ---多种查找
2.1.2层级选择器
$(".outer div") ---outer类下的所有div子孙
$(".outer>div") ---outer类下的所有第一代div
$(".outer+div") ---下一个毗邻标签,紧贴不能被其他标签隔开,相当于next()
$(".outer~div") ---所有同级兄弟div标签
2.1.3 基本筛选器
$("#f1 li:first") ---id为f1的子孙中第一个li标签 PS:也可写成$("#f1 li").first()
$("#f1 li:last") ---id为f1的子孙中最后一个li标签
$("#f1>input":not('.c1,.c2')) ---id为f1下的class值不为c1或c2的input标签
$("#f1 li:even") ---id为f1下的第1、3、5。。个li标签(索引为偶数)
$("#f1>li:odd") ---id为f1下的第2、4、6。。个li标签(索引为奇数)
$("#f1>li:eq(1)") ---id为f1下的儿子辈中第二个li标签(1表示索引)
$("#f1>li:gt(1)") ---id为f1下的所有索引大于1的li标签
$("#f1>li:lt(1)") ---id为f1下的所有索引小于1的li标签
$(":focus") --- 焦点
2.1.4 属性选择器
$("[test='xiaoming']") ---全局中找test为xiaoming的标签($("#div1 p[test='xiaoming']")可在前面添加标签或位置限定)
2.1.5 表单选择器
$("[type='text']")----->$(":text") 注意只适用于input标签
$("input:checked")
2.2 筛选器
2.2.1 过滤筛选器
$("li").eq(2)
$("li").first()
$("ul li").hasclass("test")
2.2.2 查找筛选器
$("div").children(".test")
$("div").find(".test")
$(".test").next()
$(".test").nextAll()
$(".test").nextUntil()
$("div").prev()
$("div").prevAll()
$("div").prevUntil()
$(".test").parent()
$(".test").parents()
$(".test").parentUntil()
$("div").siblings()
实例 左侧菜单
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>left_menu</title> <script src="js/jquery-2.2.3.js"></script> <script> function show(self){ // console.log($(self).text()) $(self).next().removeClass("hide") $(self).parent().siblings().children(".con").addClass("hide") } </script> <style> .menu{ height: 500px; width: 30%; background-color: gainsboro; float: left; } .content{ height: 500px; width: 70%; background-color: rebeccapurple; float: left; } .title{ line-height: 50px; background-color: #425a66; color: forestgreen;} .hide{ display: none; } </style> </head> <body> <div class="outer"> <div class="menu"> <div class="item"> <div class="title" onclick="show(this);">菜单一</div> <div class="con"> <div>111</div> <div>111</div> <div>111</div> </div> </div> <div class="item"> <div class="title" onclick="show(this);">菜单二</div> <div class="con hide"> <div>111</div> <div>111</div> <div>111</div> </div> </div> <div class="item"> <div class="title" onclick="show(this);">菜单三</div> <div class="con hide"> <div>111</div> <div>111</div> <div>111</div> </div> </div> </div> <div class="content"></div> </div> </body> </html>
实例 tab切换
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>tab</title> <script src="js/jquery-2.2.3.js"></script> <script> function tab(self){ var index=$(self).attr("xxx") $("#"+index).removeClass("hide").siblings().addClass("hide") $(self).addClass("current").siblings().removeClass("current") } </script> <style> *{ margin: 0px; padding: 0px; } .tab_outer{ margin: 0px auto; width: 60%; } .menu{ background-color: #cccccc; /*border: 1px solid red;*/ line-height: 40px; } .menu li{ display: inline-block; } .menu a{ border-right: 1px solid red; padding: 11px; } .content{ background-color: tan; border: 1px solid green; height: 300px; } .hide{ display: none; } .current{ background-color: darkgray; color: yellow; border-top: solid 2px rebeccapurple; } </style> </head> <body> <div class="tab_outer"> <ul class="menu"> <li xxx="c1" class="current" onclick="tab(this);">菜单一</li> <li xxx="c2" onclick="tab(this);">菜单二</li> <li xxx="c3" onclick="tab(this);">菜单三</li> </ul> <div class="content"> <div id="c1">内容一</div> <div id="c2" class="hide">内容二</div> <div id="c3" class="hide">内容三</div> </div> </div> </body> </html>
三、操作元素(属性 CSS和文档处理)
3.1 属性操作
$("p").text() $("p").html() $(":checkbox").val()
$(".test").attr("alex") $(".test").attr("alex","sb")
$(".test").attr("checked","checked") $(":checkbox").removeAttr("checked")
$(".test").prop("checked",true)
$(".test").addClass("hide")
实例 编辑框正反选
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <script src="js/jquery-2.2.3.js"></script> <script> function selectall(){ $("table :checkbox").prop("checked",true) } function che(){ $("table :checkbox").prop("checked",false) } function reverse(){ // var idlist=$("table :checkbox") // for(var i=0;i<idlist.length;i++){ // var element=idlist[i]; // // var ischecked=$(element).prop("checked") // if (ischecked){ // $(element).prop("checked",false) // } // else { // $(element).prop("checked",true) // } // // } $("table :checkbox").each(function(){ if ($(this).prop("checked")){ $(this).prop("checked",false) } else { $(this).prop("checked",true) } }); // li=[10,20,30,40] //// dic={name:"yuan",sex:"male"} // $.each(li,function(i,x){ // console.log(i,x) // }) } </script> </head> <body> <button onclick="selectall();">全选</button> <button onclick="che();">取消</button> <button onclick="reverse();">反选</button> <table border="1"> <tr> <td><input type="checkbox"></td> <td>111</td> </tr> <tr> <td><input type="checkbox"></td> <td>222</td> </tr> <tr> <td><input type="checkbox"></td> <td>333</td> </tr> <tr> <td><input type="checkbox"></td> <td>444</td> </tr> </table> </body> </html>
实例 模态对话框
<!DOCTYPE html> <html> <head> <meta charset="utf-8" /> <title>批量编辑</title> <!--<link rel="stylesheet" href="css/mycss.css" />--> <style> *{ margin: 0; padding: 0; } body { font-family: 'Open Sans', sans-serif; font-weight: 300; line-height: 1.42em; color:rebeccapurple; background-color:goldenrod; } h1 { font-size:3em; font-weight: 300; line-height:1em; text-align: center; color: #4DC3FA; } .blue { color: #185875; } .yellow { color: #FFF842; } /*!*弹出层罩子*!*/ #full { background-color:gray; left:0; opacity:0.7; position:absolute; top:0; filter:alpha(opacity=30); } .modified { background-color: #1F2739; border:3px solid whitesmoke; height:400px; left:50%; margin:-200px 0 0 -200px; padding:1px; position:fixed; /*position:absolute;*/ top:50%; width:400px; display:none; } li { list-style: none; margin: 20px 0 0 50px; color: #FB667A; } input[type="text"] { padding: 10px; border: solid 1px #dcdcdc; /*transition: box-shadow 3s, border 3s;*/ } .iputbutton { margin: 60px 0 0 50px; color: whitesmoke; background-color: #FB667A; height: 30px; width: 100px; border: 1px dashed; } .container th h1 { font-weight: bold; font-size: 1em; text-align: left; color: #185875; } .container td { font-weight: normal; font-size: 1em; } .container { width: 80%; margin: 0 auto; } .container td, .container th { padding-bottom: 2%; padding-top: 2%; padding-left:2%; } /*单数行*/ .container tr:first-child { background-color: red; } /*偶数行*/ .container tr:not(first-child){ background-color: cyan; } .container th { background-color: #1F2739; } .container td:last-child { color: #FB667A; } /*鼠标进过行*/ .container tr:hover { background-color: #464A52; } /*鼠标进过列*/ .container td:hover { background-color: #FB667A; color: #403E10; font-weight: bold; transform: translate3d(5px, -5px, 0); } </style> <script src="jquery-2.2.3.js"></script> <script> //点击【编辑】显示 $(function () { $("table[name=host] tr:gt(0) td:last-child").click(function (event) { alert("234"); // $("#full").css({height:"100%",width:"100%"}); $(".modified").data('current-edit-obj', $(this)); $(".modified,#full").show(); var hostname = $(this).siblings("td[name=hostname]").text(); $(".modified #hostname").val(hostname); var ip = $(this).siblings("td[name=ip]").text(); $(".modified #ip").val(ip); var port = $(this).siblings("td[name=port]").text(); $(".modified #port").val(port); }); //取消编辑 $(".modified #cancel").bind("click", function () { $(".modified,#full").hide(); }); // 确定修改 $(".modified #ok").bind("click", function (event) { var check_status = true; var ths = $(".modified").data('current-edit-obj'); var hostname = $(".modified #hostname").val().trim(); var ip = $(".modified #ip").val().trim(); var port = $(".modified #port").val().trim(); var port = parseInt(port); console.log(port); // 端口为空设置为22 if (isNaN(port)) { alert("您没有设置正常的SSH端口号,将采用默认22号端口"); var port = 22; }else if ( port > 65535) { // 如果端口不是一个数字 或者端口大于65535 var check_status = false; $(".modified #port").css("border-color","red"); alert("端口号超过范围!") }; // 主机和ip不能是空 if ( hostname == ""){ var check_status = false; $(".modified #hostname").css("border-color","red"); }else if (ip == "") { var check_status = false; $(".modified #ip").css("border-color","red"); }; if (check_status == false){ return false; }else{ //$(this).css("height","60px") 为什么不用$(this),而用$() $(ths).siblings("td[name=hostname]").text(hostname); $(ths).siblings("td[name=ip]").text(ip); $(ths).siblings("td[name=port]").text(port); $(".modified,#full").hide(); }; }); }); </script> </head> <body> <h1> <span class="blue"><</span>Homework1<span class="blue">></span> <span class="yellow">HostList</span> </h1> <div id="full"> <div class="modified"> <li>主机名:<input id="hostname" type="text" value="" />*</li> <li>ip地址:<input id="ip" type="text" value="" />*</li> <li>端口号:<input id="port" type="text" value="" />[0-65535]</li> <div id="useraction"> <input class="iputbutton" type="button" name="确定" id="ok" value="确定"/> <input class="iputbutton" type="button" name="取消" id="cancel" value="取消"/> </div> </div> </div> <table class="container" name="host"> <tr> <th><h1>主机名</h1></th> <th><h1>IP地址</h1></th> <th><h1>端口</h1></th> <th><h1>操作</h1></th> </tr> <tr> <td name="hostname">web01</td> <td name="ip">192.168.2.1</td> <td name="port">22</td> <td>编辑 </td> </tr> <tr> <td name="hostname">web02</td> <td name="ip">192.168.2.2</td> <td name="port">223</td> <td>编辑 </td> </tr> <tr> <td name="hostname">web03</td> <td name="ip">192.168.2.3</td> <td name="port">232</td> <td>编辑 </td> </tr> <tr> <td name="hostname">web04</td> <td name="ip">192.168.2.4</td> <td name="port">232</td> <td>编辑 </td> </tr> </table> </body> </html>
3.2 CSS操作
3.2.1(样式) css("{color:'red',backgroud:'blue'}")
3.2.2(位置) offset() position() scrollTop() scrollLeft()
3.2.3(尺寸) height() width()
实例 返回顶部
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <script src="js/jquery-2.2.3.js"></script> <script> window.onscroll=function(){ var current=$(window).scrollTop(); console.log(current) if (current>100){ $(".returnTop").removeClass("hide") } else { $(".returnTop").addClass("hide") } } function returnTop(){ // $(".div1").scrollTop(0); $(window).scrollTop(0) } </script> <style> body{ margin: 0px; } .returnTop{ height: 60px; width: 100px; background-color: darkgray; position: fixed; right: 0; bottom: 0; color: greenyellow; line-height: 60px; text-align: center; } .div1{ background-color: orchid; font-size: 5px; overflow: auto; width: 500px; } .div2{ background-color: darkcyan; } .div3{ background-color: aqua; } .div{ height: 300px; } .hide{ display: none; } </style> </head> <body> <div class="div1 div"> <p>hello</p> <p>hello</p> <p>hello</p> <p>hello</p> <p>hello</p> <p>hello</p> <p>hello</p> <p>hello</p> <p>hello</p> <p>hello</p> <p>hello</p> <p>hello</p> <p>hello</p> <p>hello</p> <p>hello</p> <p>hello</p> <p>hello</p> <p>hello</p> </div> <div class="div2 div"></div> <div class="div3 div"></div> <div class="returnTop hide" onclick="returnTop();">返回顶部</div> </body> </html>
实例 滚动菜单
<!DOCTYPE html> <html> <head lang="en"> <meta charset="UTF-8"> <title></title> <style> body{ margin: 0px; } img { border: 0; } ul{ padding: 0; margin: 0; list-style: none; } .clearfix:after { content: "."; display: block; height: 0; clear: both; visibility: hidden; } .wrap{ width: 980px; margin: 0 auto; } .pg-header{ background-color: #303a40; -webkit-box-shadow: 0 2px 5px rgba(0,0,0,.2); -moz-box-shadow: 0 2px 5px rgba(0,0,0,.2); box-shadow: 0 2px 5px rgba(0,0,0,.2); } .pg-header .logo{ float: left; padding:5px 10px 5px 0px; } .pg-header .logo img{ vertical-align: middle; width: 110px; height: 40px; } .pg-header .nav{ line-height: 50px; } .pg-header .nav ul li{ float: left; } .pg-header .nav ul li a{ display: block; color: #ccc; padding: 0 20px; text-decoration: none; font-size: 14px; } .pg-header .nav ul li a:hover{ color: #fff; background-color: #425a66; } .pg-body{ } .pg-body .catalog{ position: absolute; top:60px; width: 200px; background-color: #fafafa; bottom: 0px; } .pg-body .catalog.fixed{ position: fixed; top:10px; } .pg-body .catalog .catalog-item.active{ color: #fff; background-color: #425a66; } .pg-body .content{ position: absolute; top:60px; width: 700px; margin-left: 210px; background-color: #fafafa; overflow: auto; } .pg-body .content .section{ height: 500px; } </style> </head> <body> <div class="pg-header"> <div class="wrap clearfix"> <div class="logo"> <a href="#"> <img src="images/3.jpg"> </a> </div> <div class="nav"> <ul> <li> <a href="#">首页</a> </li> <li> <a href="#">功能一</a> </li> <li> <a href="#">功能二</a> </li> </ul> </div> </div> </div> <div class="pg-body"> <div class="wrap"> <div class="catalog"> <div class="catalog-item" auto-to="function1"><a>第1张</a></div> <div class="catalog-item" auto-to="function2"><a>第2张</a></div> <div class="catalog-item" auto-to="function3"><a>第3张</a></div> </div> <div class="content"> <div menu="function1" class="section"> <h1>第一章</h1> </div> <div menu="function2" class="section"> <h1>第二章</h1> </div> <div menu="function3" class="section"> <h1>第三章</h1> </div> </div> </div> </div> <script type="text/javascript" src="js/jquery-2.2.3.js"></script> <script type="text/javascript"> window.onscroll=function(){ var ws=$(window).scrollTop() if (ws>50){ $(".catalog").addClass("fixed") } else { $(".catalog").removeClass("fixed") } $(".content").children("").each(function(){ var offtop=$(this).offset().top; // console.log(offtop) var total=$(this).height()+offtop; if (ws>offtop && ws<total){ if($(window).height()+$(window).scrollTop()==$(document).height()){ var index=$(".catalog").children(" :last").css("fontSize","40px").siblings().css("fontSize","12px") console.log(index) target='div[auto-to="'+index+'"]'; $(".catalog").children(target).css("fontSize","40px").siblings().css("fontSize","12px") } else{ var index=$(this).attr("menu"); target='div[auto-to="'+index+'"]'; $(".catalog").children(target).css("fontSize","40px").siblings().css("fontSize","12px") } } }) } </script> </body> </html>
3.3 文档处理
内部插入 $("#c1").append("<b>hello</b>") $("p").appendTo("div")
prepend() prependTo()
外部插入 before() insertBefore() after insertAfter()
replaceWith() remove() empty() clone()
实例 clone方法的应用
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <div class="outer"> <div class="condition"> <div class="icons" style="display:inline-block"> <a onclick="add(this);"><button>+</button></a> </div> <div class="input" style="display:inline-block"> <input type="checkbox"> <input type="text" value="alex"> </div> </div> </div> <script src="js/jquery-2.2.3.js"></script> <script> function add(self){ var $duplicate = $(self).parent().parent().clone(); $duplicate.find('a[onclick="add(this);"]').attr('onclick',"removed(this)").children("").text("-"); $duplicate.appendTo($(self).parent().parent().parent()); } function removed(self){ $(self).parent().parent().remove() } </script> </body> </html>
3.4 事件
3.4.1
$(document).ready(function(){}) -----------> $(function(){})
3.4.2
$("p").click(function(){})
$("p").bind("click",function(){})
$("ul").delegate("li","click",function(){})
实例 拖动面板
<!DOCTYPE html> <html> <head lang="en"> <meta charset="UTF-8"> <title></title> </head> <body> <div style="border: 1px solid #ddd;width: 600px;position: absolute;"> <div id="title" style="background-color: black;height: 40px;color: white;"> 标题 </div> <div style="height: 300px;"> 内容 </div> </div> <script type="text/javascript" src="jquery-2.2.3.js"></script> <script> $(function(){ // 页面加载完成之后自动执行 $('#title').mouseover(function(){ $(this).css('cursor','move'); }).mousedown(function(e){ //console.log($(this).offset()); var _event = e || window.event; // 原始鼠标横纵坐标位置 var ord_x = _event.clientX; var ord_y = _event.clientY; var parent_left = $(this).parent().offset().left; var parent_top = $(this).parent().offset().top; $(this).bind('mousemove', function(e){ var _new_event = e || window.event; var new_x = _new_event.clientX; var new_y = _new_event.clientY; var x = parent_left + (new_x - ord_x); var y = parent_top + (new_y - ord_y); $(this).parent().css('left',x+'px'); $(this).parent().css('top',y+'px'); }) }).mouseup(function(){ $(this).unbind('mousemove'); }); }) </script> </body> </html>
放大镜
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>bigger</title> <style> *{ margin: 0; padding:0; } .outer{ height: 350px; width: 350px; border: dashed 5px cornflowerblue; } .outer .small_box{ position: relative; } .outer .small_box .float{ height: 175px; width: 175px; background-color: darkgray; opacity: 0.4; fill-opacity: 0.4; position: absolute; display: none; } .outer .big_box{ height: 400px; width: 400px; overflow: hidden; position:absolute; left: 360px; top: 0px; z-index: 1; border: 5px solid rebeccapurple; display: none; } .outer .big_box img{ position: absolute; z-index: 5; } </style> </head> <body> <div class="outer"> <div class="small_box"> <div class="float"></div> <img src="small.jpg"> </div> <div class="big_box"> <img src="big.jpg"> </div> </div> <script src="js/jquery-2.2.3.js"></script> <script> $(function(){ $(".small_box").mouseover(function(){ $(".float").css("display","block"); $(".big_box").css("display","block") }) $(".small_box").mouseout(function(){ $(".float").css("display","none"); $(".big_box").css("display","none") }) $(".small_box").mousemove(function(e){ var _event=e || window.event; var float_width=$(".float").width(); var float_height=$(".float").height(); console.log(float_height,float_width); var float_height_half=float_height/2; var float_width_half=float_width/2; console.log(float_height_half,float_width_half); var small_box_width=$(".small_box").height(); var small_box_height=$(".small_box").width(); // 鼠标点距离左边界的长度与float应该与左边界的距离差半个float的width,height同理 var mouse_left=_event.clientX-float_width_half; var mouse_top=_event.clientY-float_height_half; if(mouse_left<0){ mouse_left=0 }else if (mouse_left>small_box_width-float_width){ mouse_left=small_box_width-float_width } if(mouse_top<0){ mouse_top=0 }else if (mouse_top>small_box_height-float_height){ mouse_top=small_box_height-float_height } $(".float").css("left",mouse_left+"px"); $(".float").css("top",mouse_top+"px") var percentX=($(".big_box img").width()-$(".big_box").width())/ (small_box_width-float_width); var percentY=($(".big_box img").height()-$(".big_box").height())/(small_box_height-float_height); console.log(percentX,percentY) $(".big_box img").css("left", -percentX*mouse_left+"px") $(".big_box img").css("top", -percentY*mouse_top+"px") }) }) </script> </body> </html>
3.5 动画效果
实例 隐藏与显示
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <script src="js/jquery-2.2.3.js"></script> <script> /** * Created by yuan on 16/5/5. */ $(document).ready(function(){ $("#hide").click(function(){ $("p").hide(1000); }); $("#show").click(function(){ $("p").show(1000); }); //用于切换被选元素的 hide() 与 show() 方法。 $("#toggle").click(function(){ $("p").toggle(); }) for (var i= 0;i<7;i++){ // 颠倒了常规的$(A).append(B)的操作,即不是把B追加到A中,而是把A追加到B中。 $("<div>").appendTo(document.body); } $("div").click(function(){ $(this).hide(2000); }); }); </script> <link type="text/css" rel="stylesheet" href="style.css"> </head> <body> <!--1 隐藏与显示--> <!--2 淡入淡出--> <!--3 滑动--> <!--4 效果-回调:每一个动画执行完毕之后所能执行的函数方法或者所能做的一件事--> <p>hello</p> <button id="hide">隐藏</button> <button id="show">显示</button> <button id="toggle">隐藏/显示</button> </body> </html>
实例 淡入淡出
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <script src="js/jquery-2.2.3.js"></script> <script> $(document).ready(function(){ $("#in").click(function(){ $("#id1").fadeIn(1000); $("#id2").fadeIn(1000); $("#id3").fadeIn(1000); }); $("#out").click(function(){ $("#id1").fadeOut(1000); $("#id2").fadeOut(1000); $("#id3").fadeOut(1000); }); $("#toggle").click(function(){ $("#id1").fadeToggle(1000); $("#id2").fadeToggle(1000); $("#id3").fadeToggle(1000); }); $("#fadeto").click(function(){ $("#id1").fadeTo(1000,0.4); $("#id2").fadeTo(1000,0.5); $("#id3").fadeTo(1000,0); }); }); </script> </head> <body> <button id="in">fadein</button> <button id="out">fadeout</button> <button id="toggle">fadetoggle</button> <button id="fadeto">fadeto</button> <div id="id1" style="display:none; width: 80px;height: 80px;background-color: blueviolet"></div> <div id="id2" style="display:none; width: 80px;height: 80px;background-color: orangered "></div> <div id="id3" style="display:none; width: 80px;height: 80px;background-color: darkgreen "></div> </body> </html>
实例 滑动
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <script src="js/jquery-2.2.3.js"></script> <script> $(document).ready(function(){ $("#flipshow").click(function(){ $("#content").slideDown(1000); }); $("#fliphide").click(function(){ $("#content").slideUp(1000); }); $("#toggle").click(function(){ $("#content").slideToggle(1000); }) }); </script> <style> #flipshow,#content,#fliphide,#toggle{ padding: 5px; text-align: center; background-color: blueviolet; border:solid 1px red; } #content{ padding: 50px; display: none; } </style> </head> <body> <div id="flipshow">出现</div> <div id="fliphide">隐藏</div> <div id="toggle">toggle</div> <div id="content">helloworld</div> </body> </html>
实例 回调函数
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <script src="js/jquery-2.2.3.js"></script> <script> $(document).ready(function(){ $("button").click(function(){ $("p").hide(1000,function(){ alert('动画结束') }) // $("p").css('color','red').slideUp(1000).slideDown(2000) }) }); </script> </head> <body> <button>隐藏</button> <p>helloworld helloworld helloworld</p> </body> </html>
3.6 扩展(插件机制)
- jquery.extend({})
- jquery.fn.extend({})
实例 商城菜单
<!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <meta name="viewport" content="width=device-width"> <meta http-equiv="X-UA-Compatible" content="IE=8"> <title>购物商城</title> <style> *{ margin: 0; padding: 0; } .hide{ display:none; } .header-nav { height: 39px; background: #c9033b; } .header-nav .bg{ background: #c9033b; } .header-nav .nav-allgoods .menuEvent { display: block; height: 39px; line-height: 39px; text-decoration: none; color: #fff; text-align: center; font-weight: bold; font-family: 微软雅黑; color: #fff; width: 100px; } .header-nav .nav-allgoods .menuEvent .catName { height: 39px; line-height: 39px; font-size: 15px; } .header-nav .nav-allmenu a { display: inline-block; height: 39px; vertical-align: top; padding: 0 15px; text-decoration: none; color: #fff; float: left; } .header-menu a{ color:#656565; } .header-menu .menu-catagory{ position: absolute; background-color: #fff; border-left:1px solid #fff; height: 316px; width: 230px; z-index: 4; float: left; } .header-menu .menu-catagory .catagory { border-left:4px solid #fff; height: 104px; border-bottom: solid 1px #eaeaea; } .header-menu .menu-catagory .catagory:hover { height: 102px; border-left:4px solid #c9033b; border-bottom: solid 1px #bcbcbc; border-top: solid 1px #bcbcbc; } .header-menu .menu-content .item{ margin-left:230px; position:absolute; background-color:white; height:314px; width:500px; z-index:4; float:left; border: solid 1px #bcbcbc; border-left:0; box-shadow: 1px 1px 5px #999; } </style> </head> <body> <div class="pg-header"> <div class="header-nav"> <div class="container narrow bg"> <div class="nav-allgoods left"> <a id="all_menu_catagory" href="#" class="menuEvent"> <strong class="catName">全部商品分类</strong> <span class="arrow" style="display: inline-block;vertical-align: top;"></span> </a> </div> </div> </div> <div class="header-menu"> <div class="container narrow hide"> <div id="nav_all_menu" class="menu-catagory"> <div class="catagory" float-content="one"> <div class="title">家电</div> <div class="body"> <a href="#">空调</a> </div> </div> <div class="catagory" float-content="two"> <div class="title">床上用品</div> <div class="body"> <a href="http://www.baidu.com">床单</a> </div> </div> <div class="catagory" float-content="three"> <div class="title">水果</div> <div class="body"> <a href="#">橘子</a> </div> </div> </div> <div id="nav_all_content" class="menu-content"> <div class="item hide" float-id="one"> <dl> <dt><a href="#" class="red">厨房用品</a></dt> <dd> <span>| <a href="#" target="_blank" title="勺子">勺子</a> </span> </dd> </dl> <dl> <dt><a href="#" class="red">厨房用品</a></dt> <dd> <span>| <a href="#" target="_blank" title="菜刀">菜刀</a> </span> </dd> </dl> <dl> <dt><a href="#" class="red">厨房用品</a></dt> <dd> <span>| <a href="#">菜板</a> </span> </dd> </dl> <dl> <dt><a href="#" class="red">厨房用品</a></dt> <dd> <span>| <a href="#" target="_blank" title="碗">碗</a> </span> </dd> </dl> </div> <div class="item hide" float-id="two"> <dl> <dt><a href="#" class="red">厨房用品</a></dt> <dd> <span>| <a href="#" target="_blank" title="">角阀</a> </span> </dd> </dl> <dl> <dt><a href="#" class="red">厨房用品</a></dt> <dd> <span>| <a href="#" target="_blank" title="角阀">角阀</a> </span> </dd> </dl> <dl> <dt><a href="#" class="red">厨房用品</a></dt> <dd> <span>| <a href="#" target="_blank" title="角阀">角阀</a> </span> </dd> </dl> </div> <div class="item hide" float-id="three"> <dl> <dt><a href="#" class="red">厨房用品3</a></dt> <dd> <span>| <a href="#" target="_blank" title="角阀">角阀3</a> </span> </dd> </dl> <dl> <dt><a href="#" class="red">厨房用品3</a></dt> <dd> <span>| <a href="http://www.meilele.com/category-jiaofa/" target="_blank" title="角阀">角阀3</a> </span> </dd> </dl> </div> </div> </div> </div> </div> <script src="js/jquery-2.2.3.js"></script> <script type="text/javascript"> $(document).ready(function () { Change_Menu('#all_menu_catagory','#nav_all_menu', '#nav_all_content'); }); function Change_Menu(all_menu_catagory,menu, content) { $all_menu_catagory = $(all_menu_catagory); $menu = $(menu); $content = $(content); $all_menu_catagory.bind("mouseover", function () { $menu.parent().removeClass('hide'); }); $all_menu_catagory.bind("mouseout", function () { $menu.parent().addClass('hide'); }); $menu.children().bind("mouseover", function () { $menu.parent().removeClass('hide'); $item_content = $content.find('div[float-id="' + $(this).attr("float-content") + '"]'); $item_content.removeClass('hide').siblings().addClass('hide'); }); $menu.bind("mouseout", function () { $content.children().addClass('hide'); $menu.parent().addClass('hide'); }); $content.children().bind("mouseover", function () { $menu.parent().removeClass('hide'); $(this).removeClass('hide'); }); $content.children().bind("mouseout", function () { $(this).addClass('hide'); $menu.parent().addClass('hide'); }); } </script> </body> </html>
实例 编辑框
<!DOCTYPE html> <html> <head lang="en"> <meta charset="UTF-8"> <title></title> <style> .edit-mode{ background-color: #b3b3b3; padding: 8px; text-decoration: none; color: white; } .editing{ background-color: #f0ad4e; } </style> </head> <body> <div style="padding: 20px"> <input type="button" onclick="CheckAll('#edit_mode', '#tb1');" value="全选" /> <input type="button" onclick="CheckReverse('#edit_mode', '#tb1');" value="反选" /> <input type="button" onclick="CheckCancel('#edit_mode', '#tb1');" value="取消" /> <a id="edit_mode" class="edit-mode" href="javascript:void(0);" onclick="EditMode(this, '#tb1');">进入编辑模式</a> </div> <table border="1"> <thead> <tr> <th>选择</th> <th>主机名</th> <th>端口</th> <th>状态</th> </tr> </thead> <tbody id="tb1"> <tr> <td><input type="checkbox" /></td> <td edit="true">v1</td> <td>v11</td> <td edit="true" edit-type="select" sel-val="1" global-key="STATUS">在线</td> </tr> <tr> <td><input type="checkbox" /></td> <td edit="true">v1</td> <td>v11</td> <td edit="true" edit-type="select" sel-val="2" global-key="STATUS">下线</td> </tr> <tr> <td><input type="checkbox" /></td> <td edit="true">v1</td> <td>v11</td> <td edit="true" edit-type="select" sel-val="1" global-key="STATUS">在线</td> </tr> </tbody> </table> <script type="text/javascript" src="js/jquery-2.2.3.js"></script> <script> /* 监听是否已经按下control键 */ window.globalCtrlKeyPress = false; window.onkeydown = function(event){ if(event && event.keyCode == 17){ window.globalCtrlKeyPress = true; } }; window.onkeyup = function(event){ if(event && event.keyCode == 17){ window.globalCtrlKeyPress = false; } }; /* 按下Control,联动表格中正在编辑的select */ function MultiSelect(ths){ if(window.globalCtrlKeyPress){ var index = $(ths).parent().index(); var value = $(ths).val(); $(ths).parent().parent().nextAll().find("td input[type='checkbox']:checked").each(function(){ $(this).parent().parent().children().eq(index).children().val(value); }); } } </script> <script type="text/javascript"> $(function(){ BindSingleCheck('#edit_mode', '#tb1'); }); function BindSingleCheck(mode, tb){ $(tb).find(':checkbox').bind('click', function(){ var $tr = $(this).parent().parent(); if($(mode).hasClass('editing')){ if($(this).prop('checked')){ RowIntoEdit($tr); }else{ RowOutEdit($tr); } } }); } function CreateSelect(attrs,csses,option_dict,item_key,item_value,current_val){ var sel= document.createElement('select'); $.each(attrs,function(k,v){ $(sel).attr(k,v); }); $.each(csses,function(k,v){ $(sel).css(k,v); }); $.each(option_dict,function(k,v){ var opt1=document.createElement('option'); var sel_text = v[item_value]; var sel_value = v[item_key]; if(sel_value==current_val){ $(opt1).text(sel_text).attr('value', sel_value).attr('text', sel_text).attr('selected',true).appendTo($(sel)); }else{ $(opt1).text(sel_text).attr('value', sel_value).attr('text', sel_text).appendTo($(sel)); } }); return sel; } STATUS = [ {'id': 1, 'value': "在线"}, {'id': 2, 'value': "下线"} ]; BUSINESS = [ {'id': 1, 'value': "车上会"}, {'id': 2, 'value': "二手车"} ]; function RowIntoEdit($tr){ $tr.children().each(function(){ if($(this).attr('edit') == "true"){ if($(this).attr('edit-type') == "select"){ var select_val = $(this).attr('sel-val'); var global_key = $(this).attr('global-key'); var selelct_tag = CreateSelect({"onchange": "MultiSelect(this);"}, {}, window[global_key], 'id', 'value', select_val); $(this).html(selelct_tag); }else{ var orgin_value = $(this).text(); var temp = "<input value='"+ orgin_value+"' />"; $(this).html(temp); } } }); } function RowOutEdit($tr){ $tr.children().each(function(){ if($(this).attr('edit') == "true"){ if($(this).attr('edit-type') == "select"){ var new_val = $(this).children(':first').val(); var new_text = $(this).children(':first').find("option[value='"+new_val+"']").text(); $(this).attr('sel-val', new_val); $(this).text(new_text); }else{ var orgin_value = $(this).children().first().val(); $(this).text(orgin_value); } } }); } function CheckAll(mode, tb){ if($(mode).hasClass('editing')){ $(tb).children().each(function(){ var tr = $(this); var check_box = tr.children().first().find(':checkbox'); if(check_box.prop('checked')){ }else{ check_box.prop('checked',true); RowIntoEdit(tr); } }); }else{ $(tb).find(':checkbox').prop('checked', true); } } function CheckReverse(mode, tb){ if($(mode).hasClass('editing')){ $(tb).children().each(function(){ var tr = $(this); var check_box = tr.children().first().find(':checkbox'); if(check_box.prop('checked')){ check_box.prop('checked',false); RowOutEdit(tr); }else{ check_box.prop('checked',true); RowIntoEdit(tr); } }); }else{ // $(tb).children().each(function(){ var tr = $(this); var check_box = tr.children().first().find(':checkbox'); if(check_box.prop('checked')){ check_box.prop('checked',false); }else{ check_box.prop('checked',true); } }); } } function CheckCancel(mode, tb){ if($(mode).hasClass('editing')){ $(tb).children().each(function(){ var tr = $(this); var check_box = tr.children().first().find(':checkbox'); if(check_box.prop('checked')){ check_box.prop('checked',false); RowOutEdit(tr); }else{ } }); }else{ $(tb).find(':checkbox').prop('checked', false); } } function EditMode(ths, tb){ if($(ths).hasClass('editing')){ $(ths).removeClass('editing'); $(tb).children().each(function(){ var tr = $(this); var check_box = tr.children().first().find(':checkbox'); if(check_box.prop('checked')){ RowOutEdit(tr); }else{ } }); }else{ $(ths).addClass('editing'); $(tb).children().each(function(){ var tr = $(this); var check_box = tr.children().first().find(':checkbox'); if(check_box.prop('checked')){ RowIntoEdit(tr); }else{ } }); } } </script> </body> </html>