jquery 求教：如何去思考一个JQ的组件封装？
如何去思考一个JQ的组件封装？想请教一个比较详细的思路，我自身在思考的时候对于这个学习没有一个太理想的思路。主要是在JS的代码结构规划上面。
比如：我有一个表格，里面放进了数量，名字，高度，宽度，等等一系列的数据，数据格式object,array,number,fn()等等各种都有。在外面调用这个组件时根据传入的数据将对应的信息显示出来。
这是一个别人封装的插件样例：
(function($ , undefined) {
var Table = function (element, options) {
this.$this = $(element);
this.options = $.extend({}, $.fn.table.defaults, options);
this.init();
};
// 使用proptotype给Table添加属性，
Table.prototype = {
constructor: Table,
dataToObj: function(str){
if(typeof str == "string" && str[0] == "&"){
str = str.substring(1, str.length);
}
if(typeof str == "string"){
str = str.replace(/&/g,"','");
str = str.replace(/=/g,"':'");
str = "({'"+str +"'})";
return eval(str);
}
},
init: function () {
var options = this.options;
if(!options.columns) return false;
this.$this.html("");
this.initTableHead();
this.initTableBody(options.currentPage);
},
initTableHead: function(){
var options = this.options,
tableWrap = this.$this,
attributesArr = [],
theadStr = '<thead><tr class="'+options.hdBg+'">';
for(var i=0, len=options.columns.length; i< len; i++){
theadStr += '<th data-attribute="'+options.columns[i].dataIndex+'" width="'+(options.columns[i].width || "")+'">'+options.columns[i].title+'</th>';
attributesArr.push(options.columns[i].dataIndex);
}
this.options.attributes = attributesArr;
theadStr += '</tr></thead><tbody></tbody>';
this.$this.append(theadStr);
},
initTableBody: function(currentPage){
var that = this, options = this.options, data = null;
data = this.dataToObj(options.data);
$.ajax({
type: "POST",
dataType: "json",
url: options.url,
data: options.data,
beforeSend: function(){
Common.showLoading();
},
timeout: options.timeout,
complete: function(XMLHttpRequest, textStatus){
if(textStatus == "timeout"){ Common.dialogTip({info: "请求超时,请重试！！！"}); }
Common.hideLoading();
},
success : function(result){
if(result.errorCode == "106"){
location.href= result.info + "?goto=" + location.href;
}else if(result.success) {
var totalCount = result.total,
attributes = options.attributes,
tbodyWrap = that.$this.find("tbody"),
rowStr = "",
tbodyStr = "";
if(result.data.length > 0){
$.each(result.data,function(index, row){
var rowStr="<tr>";
for(var key in attributes){
var tddata=(row[attributes[key]] || "");
if(row[attributes[key]] === 0){
tddata = "0";
}
//去除html标签，如果有的话
var reg =new RegExp("<\/?[^>]*>");
if(reg.test(tddata)){
tddata =tddata.replace(/<[^>]+>/g,"");
}
rowStr +="<td>"+tddata+"</td>";
}
rowStr+="</tr>";
tbodyStr += rowStr;
});
tbodyWrap.html(tbodyStr);
that.rendererTd(result.data);
//加载分页
if(options.pagingBar && result.data.length > 0){
pageNo = data ? data.pageNo : 0;
that.loadPagingBar(result.total, parseInt(currentPage || pageNo));
}
}else{
tbodyWrap.html('<tr><td colspan="'+options.columns.length+'" class="text-center">没有找到任何数据！！！</td></tr>');
$('#'+options.pagingBarId).html("");
}
if(typeof(options.callback) == 'function'){
options.callback(result, data)
}
}else {
that.dialogTip(result.info);
}
}
});
},
rendererTd: function(rowsData){
var columns = this.options.columns,
rowElem = null,
rendererTd = null;
this.$this.children("tbody").children("tr").each(function(index, elem){
rowElem = $(elem);
$.each(columns, function(i, item){
if(columns[i].renderer && typeof columns[i].renderer == "function"){
rendererTd = rowElem.children("td:eq("+i+")");
columns[i].renderer.call(rendererTd, rendererTd.text(), rowsData[index]);
}
});
});
var onRendered = this.options.onRendered;
if (onRendered && typeof(onRendered) == "function") {
onRendered.call(this);
}
},
loadPagingBar: function(total, currentPage){
total = total || 0;
currentPage = currentPage || 1;
var that = this,
options = this.options,
totalPages = Math.ceil(total/options.pageSize),
pageWrap = $('#'+options.pagingBarId);
//console.log(total + "......" +totalPages);
pageWrap.html('');
pageWrap.html('<ul class="pagination pagination-sm" id="pager-ext" style="margin:7px 0 2px 0;"></ul>');
pageWrap.find('#pager-ext').twbsPagination({
totalPages:totalPages,
visiblePages:options.visiblePages,
startPage: currentPage,
first: '第一页',
prev: '上一页',
next: '下一页',
last: '最后页',
onPageClick: function (event, page) {
if(typeof options.onPageClick == "function"){
var obj = options.onPageClick(event, page);
$.extend(that.options, obj);
that.initTableBody(page);
}
}
});
pageWrap.data("currPage", currentPage);
pageWrap.find('#pager-ext').append('<li class="last active disabled"><a href="#">共'+totalPages+' 页</a></li>');
pageWrap.find('#pager-ext').append('<li class="last active disabled"><a href="#">总计 '+total+' 条</a></li>');
},
dialogTip: function(info){
var dialogStr = '<div class="modal fade">'+
'<div class="modal-dialog">'+
'<div class="modal-content">'+
'<div class="modal-header">'+
'<button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button>'+
'<h4 class="modal-title">友情提示</h4>'+
'</div>'+
'<div class="modal-body text-overflow">'+info+
'</div>'+
'</div>'+
'</div>'+
'</div>';
var wrap = $(dialogStr);
$("body").append(wrap);
wrap.modal('show');
wrap.find(".close").on("click", function(){
wrap.modal('hide');
$("body").removeClass("modal-open");
wrap.remove();
});
}
};
// option 可以是对象或者是方法名
// value option为方法名时的参数
$.fn.table = function (option, value) {
var methodReturn;
var $set = this.each(function () {
var $this = $(this),
options = typeof option === 'object' && option,
data = new Table(this, options);
if (typeof option === 'string') {
methodReturn = data[option](value);
};
});
return methodReturn ? $set : methodReturn;
};
/*
* columns = [{ title: '供货商来源', width: 150, dataIndex: 'c', renderer:function(value,obj){
* return value+':'+obj.d;
* }}]
*
* */
$.fn.table.defaults = {
url : "",
data:"",
pageSize:10,
timeout: 10000,
currentPage: 1,
autoLoad:true,
columns : null,
pagingBar:true,
hdBg:"success",
pagingBarId: "paginationholder",
visiblePages:7,
onPageClick: null,
onRendered: null,
callback: null
};
// 将插件类暴露给外界:
$.fn.table.Constructor = Table;
})(jQuery);
