[js插件开发教程]定制一个手风琴插件(accordion)

本文带来一个垂直方向的手风琴插件开发，可以定制的功能如下：

contentClass : 'panel',    //面板样式
navClass : 'nav',          //导航样式
activeClass : 'active',    //导航激活样式
triggerElements : '*',     //触发元素
activeIndex : 0,           //默认选中的元素
evType : 'click',          //默认触发的事件
animate : true,            //是否支持动画渐变
multiple : false           //是否支持多个面板同时展开

调用方法：

$(".accordion").accordion( { animate : true, multiple : true } );   //支持多个面板同时展开， 支持动画效果

效果预览：

$(".accordion").accordion( { animate : false, multiple : true } );
这种效果就是跟选项卡一样

$(".accordion").accordion( { 'animate' : true } );
不支持多个面板，永远只有一个面板被打开

效果预览：

完整的手风琴插件代码：

html部分:

 1 <!DOCTYPE html>
 2 <html>
 3 <head lang="en">
 4     <!--作者:ghostwu(吴华)-->
 5     <meta charset="UTF-8">
 6     <title></title>
 7     <link rel="stylesheet" href="./css/accordion.css"/>
 8     <script src="./js/accordion.js"></script>
 9     <script>
10         window.onload = function(){
11             $(".accordion").accordion( { 'animate' : true } );
12         }
13     </script>
14 </head>
15 <body>
16     <div class="main">
17         <div class="accordion">
18             <div class="panel">面板1</div>
19             <div class="nav">导航1</div>
20             <div class="panel">面板2</div>
21             <div class="nav">导航2</div>
22             <div class="panel">面板3</div>
23             <div class="nav">导航3</div>
24             <div class="panel">面板4</div>
25             <div class="nav">导航4</div>
26             <div class="panel">面板5</div>
27             <div class="nav">导航5</div>
28         </div>
29     </div>
30 </body>
31 </html>

View Code

css样式部分:

 1 * {
 2     margin: 0;
 3     padding: 0;
 4 }
 5 body {
 6     font-size: 14px;
 7     font-family: Tahoma, Verdana,"Microsoft Yahei";
 8 }
 9 a{
10     text-decoration: none;
11     color:#000;
12 }
13 ul,li{
14     list-style-type: none;
15 }
16 img {
17     border:none;
18 }
19 .main {
20     width:960px;
21     margin:20px auto;
22 }
23 
24 .accordion{
25     width:400px;
26     margin: 0 auto 10px;
27 }
28 
29 .accordion .nav {
30     border-bottom: 1px dashed #0064cd;
31 }
32 .accordion .panel{
33     height:100px;
34     background:#ccc;
35 }
36 .accordion .nav{
37     height:30px;
38     background:#999;
39 }
40 .accordion .active{
41     background:#ff0;
42 }

View Code

js插件部分：

  1 /**
  2  * Created by ghostwu(吴华).
  3  */
  4 (function(){
  5     var G = function( selectors, context ){
  6         return new G.fn.init( selectors, context );
  7     }
  8     G.fn = G.prototype = {
  9         length : 0,
 10         constructor : G,
 11         size : function(){
 12             return this.length;
 13         },
 14         init : function( selector, context ){
 15             this.length = 0;
 16             context = context || document;
 17             if ( selector.indexOf( '#' ) == 0 ){
 18                 this[0] = document.getElementById( selector.substring( 1 ) );
 19                 this.length = 1;
 20             }else {
 21                 var aNode = context.querySelectorAll( selector );
 22                 for( var i = 0, len = aNode.length; i < len; i++ ) {
 23                     this[i] = aNode[i];
 24                 }
 25                 this.length = len;
 26             }
 27             this.selector = selector;
 28             this.context = context;
 29             return this;
 30         }
 31     }
 32 
 33     G.fn.init.prototype = G.fn;
 34     G.extend = G.fn.extend = function () {
 35         var i = 1,
 36             len = arguments.length,
 37             dst = arguments[0],
 38             j;
 39         if (dst.length === undefined) {
 40             dst.length = 0;
 41         }
 42         if (i == len) {
 43             dst = this;
 44             i--;
 45         }
 46         for (; i < len; i++) {
 47             for (j in arguments[i]) {
 48                 dst[j] = arguments[i][j];
 49                 dst.length++;
 50             }
 51         }
 52         return dst;
 53     };
 54 
 55     function css(obj, attr, value) {
 56         if (arguments.length == 3) {
 57             obj.style[attr] = value;
 58         } else {
 59             if (obj.currentStyle) {
 60                 return obj.currentStyle[attr];
 61             } else {
 62                 return getComputedStyle(obj, false)[attr];
 63             }
 64         }
 65     }
 66 
 67     function animate(obj, attr, fn) {
 68         clearInterval(obj.timer);
 69         var cur = 0;
 70         var target = 0;
 71         var speed = 0;
 72         //var start = new Date().getTime();//起始时间
 73         obj.timer = setInterval(function () {
 74             var bFlag = true;
 75             for (var key in attr) {
 76                 if (key == 'opacity') {
 77                     cur = css(obj, 'opacity') * 100;
 78                 } else {
 79                     cur = parseInt(css(obj, key));
 80                 }
 81                 target = attr[key];
 82                 speed = ( target - cur ) / 8;
 83                 speed = speed > 0 ? Math.ceil(speed) : Math.floor(speed);
 84                 console.log( cur, target );
 85                 if (cur != target) {
 86                     bFlag = false;
 87                     if (key == 'opacity') {
 88                         obj.style.opacity = ( cur + speed ) / 100;
 89                         obj.style.filter = "alpha(opacity:" + ( cur + speed ) + ")";
 90                     } else {
 91                         obj.style[key] = cur + speed + "px";
 92                     }
 93                 }
 94             }
 95             if (bFlag) {
 96                 //var end = new Date().getTime();//结束时间
 97                 //console.log( '总计:',  ( end - start ) );
 98                 clearInterval(obj.timer);
 99                 fn && fn.call(obj);
100             }
101         }, 30 );
102     }
103 
104     G.fn.accordion = function( options ){
105         options = options || {};
106         var defaults = {
107             contentClass : 'panel',
108             navClass : 'nav',
109             activeClass : 'active',
110             triggerElements : '*',
111             activeIndex : 0,
112             evType : 'click',
113             animate : true,
114             multiple : false
115         };
116 
117         var opt = G.extend( {}, defaults, options );
118 
119         var aNavEle = this[0].querySelectorAll( "." + opt.navClass ),
120             aPanel = this[0].querySelectorAll( "." + opt.contentClass );
121 
122         var _api = {};
123 
124         var panelHeight = parseInt( css( aPanel[opt.activeIndex], 'height' ) );
125         _api.setIndex = function( curIndex, effect ){
126             if ( opt.multiple ) {
127                 if ( effect ) {
128                     if ( parseInt( css( aPanel[curIndex], 'height' ) ) == 0 ) {
129                         aPanel[curIndex].style.display = 'block';
130                         animate( aPanel[curIndex], { 'height' : panelHeight } );
131                     }else {
132                         animate( aPanel[curIndex], { 'height' : 0 }, function(){
133                             this.style.display = 'none';
134                         } );
135                     }
136                 }else {
137                     if ( css( aPanel[curIndex], 'display' ) == 'block' ){
138                         aPanel[curIndex].style.display = 'none';
139                     }else {
140                         aPanel[curIndex].style.display = 'block';
141                     }
142                     if ( aNavEle[curIndex].classList.contains( 'active' ) ) {
143                         aNavEle[curIndex].classList.remove( 'active' );
144                     }else {
145                         aNavEle[curIndex].classList.add( 'active' );
146                     }
147                 }
148             }else {
149                 if ( effect ) {
150                     for ( var i = 0; i < aPanel.length; i++ ) {
151                         if( i != curIndex ) {
152                             if ( aPanel[i].style.display == 'block' ){
153                                 animate( aPanel[i], { 'height' : 0 }, function(){
154                                     this.style.display = 'none';
155                                 } );
156                             }else{
157                                 aPanel[i].style.display = 'none';
158                             }
159                         }else {
160                             aPanel[curIndex].style.display = 'block';
161                             animate( aPanel[curIndex], { 'height' : panelHeight } );
162                         }
163                     }
164                 }else {
165                     for ( var i = 0 ; i < aPanel.length; i++ ){
166                         aPanel[i].style.display = 'none';
167                         aNavEle[i].classList.remove( 'active' );
168                     }
169                     aPanel[curIndex].style.display = 'block';
170                     aNavEle[curIndex].classList.add( 'active' );
171                 }
172             }
173         };
174 
175         _api.setIndex( opt.activeIndex, opt.animate );
176 
177         for( var i = 0 ; i < aNavEle.length; i++ ) {
178             aNavEle[i].index = i;
179             aNavEle[i].addEventListener( opt.evType, function(){
180                 _api.setIndex( this.index, opt.animate );
181             }, false );
182         }
183         return this;
184     }
185 
186     var $ = function( selectors, context ){
187         return G( selectors, context );
188     }
189     window.$ = $;
190 })();

View Code

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原文地址：https://www.cnblogs.com/ghostwu/p/7722483.html