目前网上有很多各种各样的手风琴插件，但是没有一个完整实现了的侧菜单，今天写了一个可以无限子节点的手风琴侧菜单，有需要的可以参考一下，有什么好的想法可以留言。（没有经过彻底测试，不过问题应该不大）
下面老规矩，直接贴代码：
1 (function ($) {
2 'use strict';
3 var defaults = {
4 url: null,
5 param: {},
6 data: {},
7 fill: true,
8 level_space: 15,
9 onitemclick: null,
10 style: {
11 header: "accordion-header",
12 header_title: "accordion-header-title",
13 content: "accordion-content",
14 selected: "selected",
15 icon_base: "fa",
16 icon_collapse: "fa-angle-up",
17 icon_expand: "fa-angle-down"
18 }
19 }
20 var methods = {
21 init: function (options) {
22 return this.each(function () {
23 var $this = $(this);
24 if (!$this.hasClass("accordion")) {
25 $this.addClass("accordion");
26 }
27 var settings = $this.data('tw.accordion');
28 if (typeof (settings) == 'undefined') {
29 settings = $.extend({}, defaults, options);
30 $this.data('tw.accordion', settings);
31 } else {
32 settings = $.extend({}, settings, options);
33 $this.data('tw.accordion', settings);
34 }
35 if (settings.url) {
36 $.ajax({
37 type: "post",
38 async: false,
39 url: settings.url,
40 data: settings.param,
41 success: function (data) {
42 settings.data = data;
43 }
44 });
45 }
46 if (settings.fill) {
47 $this.height("100%");
48 }
49 if (settings.data.length > 0) {
50 $this.data("count", settings.data.length);
51 $.each(settings.data, function () {
52 this.level = 1;
53 var item = $this.accordion("add", this);
54 $this.append(item);
55 });
56 if ($this.find("." + settings.style.selected).length == 0) {
57 var data = $this.find(">li:first-child").data("data");
58 $this.accordion("select", data);
59 }
60 }
61 });
62 },
63 add: function (data) {
64 var $this = $(this);
65 var settings = $this.data("tw.accordion");
66 var item = $("<li class='" + settings.style.header + "'></li>");
67 item.data("data", data);
68 var header = $("<div class='" + settings.style.header_title + "' data-accordion='" + data.id + "'>" +
69 "<i class='" + settings.style.icon_base + "" + data.icon + "'></i>" +
70 "<span>" + data.name + "</span></div>");
71 header.css("padding-left", settings.level_space * data.level);
72 item.append(header);
73 if (data.childrens) {
74 var toggle = $("<i class='" + settings.style.icon_base + "" + settings.style.icon_collapse + "'></i>");
75 toggle.css({ "font-size": "1.4em", "position": "absolute", "top": "7px", "right": "7px" });
76 header.append(toggle);
77 var content = $("<ul class='" + settings.style.content + "'></ul>");
78 content.data("count", data.childrens.length);
79 $.each(data.childrens, function () {
80 this.level = data.level + 1;
81 var child = $this.accordion("add", this);
82 content.append(child);
83 });
84 item.append(content);
85 }
86 header.click(function () {
87 $this.accordion("select", data);
88 });
89 if (data.selected) {
90 $this.accordion("select", data);
91 }
92 return item;
93 },
94 select: function (data) {
95 var $this = $(this);
96 var settings = $this.data("tw.accordion");
97 var header = $this.find("[data-accordion='" + data.id + "']");
98 var item = header.parent();
99 if (!header.hasClass(settings.style.selected) && !item.hasClass(settings.style.selected)) {
100 var sibling = item.siblings();
101 sibling.removeClass(settings.style.selected).children("." + settings.style.selected).removeClass(settings.style.selected);
102 sibling.children("." + settings.style.icon_expand).removeClass(settings.style.icon_expand).addClass(settings.style.icon_collapse);
103 if (data.childrens) {
104 item.addClass(settings.style.selected);
105 header.find("." + settings.style.icon_collapse).removeClass(settings.style.icon_collapse).addClass(settings.style.icon_expand);
106 if (settings.fill) {
107 var count = item.parent().data("count") - 1;
108 item.css("height", "calc(100% - " + (item.height() * count) + "px)");
109 }
110 } else {
111 header.addClass(settings.style.selected);
112 }
113 }
114 if (settings.onitemclick) {
115 settings.onitemclick(data);
116 }
117 },
118 update: function (url, param) {
119 var $this = $(this);
120 var settings = $this.data("tw.accordion");
121 if (typeof url == "object") {
122 settings.param = url;
123 } else {
124 settings.url = url;
125 settings.param = param;
126 }
127 $this.accordion("init", settings);
128 },
129 destroy: function (options) {
130 return $(this).each(function () {
131 var $this = $(this);
132 $this.removeData('accordion');
133 });
134 }
135 }
136 $.fn.accordion = function () {
137 var method = arguments[0];
138 var args = arguments;
139 if (typeof (method) == 'object' || !method) {
140 method = methods.init;
141 } else if (methods[method]) {
142 method = methods[method];
143 args = $.makeArray(arguments).slice(1);
144 } else {
145 $.error('Method ' + method + ' does not exist on tw.accordion');
146 return this;
147 }
148 return method.apply(this, args);
149 }
150 })(jQuery);
1 .accordion {
2 margin:0;
3 padding:0;
4 font-size:14px;
5 }
6 .accordion > .accordion-header {
7 list-style: none;
8 margin: 0;
9 padding: 0;
10 border-bottom: 1px solid #ddd;
11 }
12 .accordion > .accordion-header.selected > .accordion-header-title {
13 color: #0094ff;
14 }
15 .accordion > .accordion-header > .accordion-header-title {
16 position: relative;
17 100%;
18 height: 35px;
19 line-height: 35px;
20 background: #eee;
21 border-bottom: 1px solid #ccc;
22 cursor: pointer;
23 }
24 .accordion > .accordion-header > .accordion-header-title > i:first-child {
25 font-size: 1.3em;
26 }
27 .accordion > .accordion-header > .accordion-header-title > span {
28 position: relative;
29 top: -1px;
30 left: 5px;
31 }
32 .accordion > .accordion-header > .accordion-content {
33 display: none;
34 100%;
35 height: calc(100% - 35px);
36 margin: 0;
37 padding: 0;
38 }
39 .accordion > .accordion-header.selected > .accordion-content {
40 display: block;
41 }
42 .accordion-content > .accordion-header {
43 list-style: none;
44 margin: 0;
45 padding: 0;
46 }
47 .accordion-content > .accordion-header.selected {
48 color: #0094ff;
49 }
50 .accordion-content > .accordion-header > .accordion-header-title {
51 position: relative;
52 100%;
53 height: 32px;
54 line-height: 32px;
55 cursor: pointer;
56 border-bottom: 1px solid #ccc;
57 }
58 .accordion-content > .accordion-header > .accordion-header-title:hover {
59 background:#eee;
60 }
61 .accordion-content > .accordion-header > .accordion-header-title.selected {
62 color: #fff;
63 background: #0094ff;
64 border-left: 3px solid #ff6a00;
65 border-bottom: 0px;
66 }
67 .accordion-content > .accordion-header > .accordion-header-title > i:first-child {
68 font-size: 1.2em;
69 }
70 .accordion-content > .accordion-header > .accordion-header-title > span {
71 position: relative;
72 top: -1px;
73 left: 5px;
74 }
75 .accordion-content > .accordion-header > .accordion-header-title.selected > i:first-child {
76 position:relative;
77 left:-3px;
78 }
79 .accordion-content > .accordion-header > .accordion-header-title.selected > span {
80 position: relative;
81 top: -1px;
82 left: 2px;
83 }
84 .accordion-content > .accordion-header > .accordion-content {
85 display: none;
86 100%;
87 height: calc(100% - 32px);
88 margin: 0;
89 padding: 0;
90 }
91 .accordion-content > .accordion-header.selected > .accordion-content {
92 display: block;
93 }