这是一个仿携程自定义的数据下拉选择select，对一些比较重要的参数进行的描述，方便初学者
插件的父元素
*data ： json 选择的数据（json格式）
*bool ： true/false data数据如果要分离成两个 值为true
*config ： 配置data的内部对象(type在bool为true的时候生效)
{
id : 数据字段,name : 数据名称,alias : 数据名称首字母,type : 数据类型
}
*fn ： function fn(){} 回调函数，点击生成标签的时执行的函
*/
function YSelect(id,Ydata,bool,config,fn){
var data = [];
Yselect_close = {};
var name_list = {A:[],B:[],C:[],D:[],E:[],F:[],G:[],H:[],I:[],J:[],K:[],L:[],M:[],N:[],O:[],P:[],Q:[],R:[],S:[],T:[],U:[],V:[],W:[],X:[],Y:[],Z:[],其他:[]} //新建数组，防止出现undefind
var YDropdowns = document.getElementById(id);
function Pretreatment(){ //处理数据
var CatalogData = [];
var BrandData = [];
var china = [];
var foreign = [];
for (var i in Ydata) {
if (Ydata[i][config.type] == null)
CatalogData.push(Ydata[i][config.id]+';'+Ydata[i][config.name]+';'+Ydata[i][config.alias])
else
BrandData.push(Ydata[i][config.id]+';'+Ydata[i][config.name]+';'+Ydata[i][config.alias]+';'+Ydata[i][config.type])
};
if (BrandData != "") {
for (var i = 0 ; i < BrandData.length ; i++) {
var str = BrandData[i].split(';')
if (str[3] == 0) china.push(str[0] + ';' + str[1] + ';' + str[2]);
else foreign.push(str[0] + ';' + str[1] + ';' + str[2]);
}
if (bool) {
data = china;
return data;
}else {
data = foreign;
return data;
}
}else{
data = CatalogData;
return data; //返回出数据
}
};
function jsondata(data_name,ida){ //处理Pretreatment返回出的数据
var tit = []; //定义首字母
var Ahtml = {A:[],其他:[]}; //新建数组，防止出现undefind
var Yselect_Box = document.createElement("div"); //新建选择框父元素
Yselect_Box.id = ida+"_Yselect_Box";
var Yselect_div = document.createElement("div"); //字母返回值的容器
var Yselect_letter = document.createElement("p"); //26字母容器
Yselect_letter.id = ida+'_Yselect_letter'
var stylelink = document.createElement("style") //创建皮肤，有两套皮肤可供选择
//stylelink.innerHTML = '#'+id+'_Yselect_Box{width: 100%;position:absolute;top:30px;left:0;z-index:9999;background:#fff}#'+id+'_Yselect_Box p{background: #469bde;padding:0 10px;}#'+id+'_Yselect_Box p span.close{font: 16px/20px 微软雅黑;cursor:pointer;position:absolute;top:0;right:0;color:#f00}#'+id+'_Yselect_Box .hide_tag{border: 1px solid #469bde;padding:5px;display: none;min-height:100px;max-height:300px;min-width:300px;max-width:800px;overflow:auto}#'+id+'_Yselect_Box p a{padding:5px;line-height: 28px;color:#fff}#'+id+'_Yselect_Box .hide_tag a{width:80px;display:block;text-decoration:none;padding:5px;line-height: 12px;font-size:12px;float:left;color:#444;overflow: hidden; text-overflow:ellipsis;white-space:nowrap;}#'+id+'_Yselect_Box .hide_tag a:hover{background:#469bde;color:#fff;}#'+id+'_Yselect_Box .cur{border-bottom: 2px solid #fac51f}';
stylelink.innerHTML = '#'+ida+'_Yselect_Box{width: 100%;min-width:500px;max-width:800px;position:absolute;top:30px;left:0;z-index:9999;background:#fff;border:1px solid #ddd;}#'+ida+'_Yselect_Box p{padding:0 10px;}#'+ida+'_Yselect_Box p span.close{font: 16px/20px 微软雅黑;cursor:pointer;position:absolute;top:0;right:0;color:#666}#'+ida+'_Yselect_Box .hide_tag{padding:5px 10px;display: none;min-height:50px;max-height:200px;overflow:auto}#'+ida+'_Yselect_Box p a{padding:5px;line-height: 28px;color:#333;border-bottom:2px solid #bbb;font-weight:bold}#'+ida+'_Yselect_Box .hide_tag a{width:80px;display:block;text-decoration:none;padding:5px;line-height: 12px;font-size:12px;float:left;color:#444;overflow: hidden; text-overflow:ellipsis;white-space:nowrap;}#'+ida+'_Yselect_Box .hide_tag a:hover{background:#469bde;color:#fff;}#'+ida+'_Yselect_Box a.cur{border-bottom: 2px solid #469bde;color:#469bde}';
for (var i = 0 ; i < data_name.length ; i++) {
var str = data_name[i].split(';')
tit.push(str[2].charAt(0).toLocaleUpperCase()) //判断首字母，赋值给tit
};
for(var j in tit){
if(name_list[tit[j]])
name_list[tit[j]].push(data_name[j]);
else name_list.其他.push(data_name[j])
} //将数据插入name_list里
for (var k in name_list){ //处理数据，以字母分离，为空就隐藏
if (name_list[k].length != 0) {
for (var i = 0 ; i < name_list[k].length ; i++) {
var allhtml = '';
Ahtml[k] += allhtml ;
};
Yselect_letter.innerHTML += ''+k+'';
Yselect_div.innerHTML += '
';
};
}
var bool = true
Yselect_Box.innerHTML = ''+ Yselect_div.innerHTML;
YDropdowns.appendChild(Yselect_Box);
YDropdowns.appendChild(stylelink); //将select插入页面
Yselect_Box.getElementsByTagName('p')[0].getElementsByTagName('span')[0].onclick = function Yselect_close(){
YDropdowns.removeChild(Yselect_Box)
YDropdowns.removeChild(stylelink);
bool = false
} //点击销毁select
Yselect_close.close = function Yselect_close(obool){
if(obool){
YDropdowns.removeChild(Yselect_Box)
YDropdowns.removeChild(stylelink);
bool = false
return
};
if (bool) {
YDropdowns.removeChild(Yselect_Box)
YDropdowns.removeChild(stylelink);
}
} //销毁select函数
return Yselect_close
}
jsondata(Pretreatment(),id)
navlist(id)
function navlist(ids){ //tab选项卡处理函数
var a = document.getElementById(ids+'_Yselect_letter').getElementsByTagName('a');
var div = document.getElementById(ids+'_Yselect_Box').getElementsByTagName('div');
div[0].style.display = "block" ; a[0].className = "cur";
for (var i = 0 ; i < a.length ; i++) {
a[i].index = i;
a[i].onclick = function(){
for (var j = 0 ; j < a.length ; j++){
div[j].style.display = "none";
a[j].className = "";
};
div[this.index].style.display = "block";
this.className = "cur"
};
};
};
};
原文链接：https://www.f2er.com/js/57950.html