layui使用及简单的三级联动实现教程

LayUI的使用

1 、引用

1、下载：官网：https://www.layui.com

2、使用方法：直接将解压好的压缩包拖拽到项目内

 将以下导入到html中： 

2、输出： hello world

3、基于layui三级联动

html



 
 
 
 
  
  
 
  
 
 
 


 
  
 

province.js
var defaults = {
 s1: 'provid',
 s2: 'cityid',
 s3: 'areaid',
 v1: null,
 v2: null,
 v3: null
};
var $form;
var form;
var $;
layui.define(['jquery', 'form'], function () {
 $ = layui.jquery;
 form = layui.form;
 $form = $('form');
 treeSelect(defaults);
});
function treeSelect(config) {
 config.v1 = config.v1 ? config.v1 : 110000;
 config.v2 = config.v2 ? config.v2 : 110100;
 config.v3 = config.v3 ? config.v3 : 110101;
 $.each(threeSelectData, function (k, v) {
  appendOptionTo($form.find('select[name=' + config.s1 + ']'), k, v.val, config.v1);
 });
 form.render();
 cityEvent(config);
 areaEvent(config);
 form.on('select(' + config.s1 + ')', function (data) {
  cityEvent(data);
  form.on('select(' + config.s2 + ')', function (data) {
   areaEvent(data);
  });
 });

 function cityEvent(data) {
  $form.find('select[name=' + config.s2 + ']').html("");
  config.v1 = data.value ? data.value : config.v1;
  $.each(threeSelectData, function (k, v) {
   if (v.val == config.v1) {
    if (v.items) {
     $.each(v.items, function (kt, vt) {
      appendOptionTo($form.find('select[name=' + config.s2 + ']'), kt, vt.val, config.v2);
     });
    }
   }
  });
  form.render();
  config.v2 = $('select[name=' + config.s2 + ']').val();
  areaEvent(config);
 }
 function areaEvent(data) {
  $form.find('select[name=' + config.s3 + ']').html("");
  config.v2 = data.value ? data.value : config.v2;
  $.each(threeSelectData, function (k, v) {
   if (v.val == config.v1) {
    if (v.items) {
     $.each(v.items, function (kt, vt) {
      if (vt.val == config.v2) {
$.each(vt.items, function (ka, va) {
 appendOptionTo($form.find('select[name=' + config.s3 + ']'), ka, va, config.v3);
});
      }
     });
    }
   }
  });
  form.render();
  form.on('select(' + config.s3 + ')', function (data) { });
 }
 function appendOptionTo($o, k, v, d) {
  var $opt = $("").text(k).val(v);
  if (v == d) { $opt.attr("selected", "selected") }
  $opt.appendTo($o);
 }
}
=======================================================================================
data数据
var threeSelectData={"北京":{val:"110000",items:{"北京":{val:"110100",items:{"东城区":"110101","西城区":"110102","崇文区":"110103","宣武区":"110104","朝阳区":"110105","丰台区":"110106","石景山区":"110107","海淀区":"110108","门头沟区":"110109","房山区":"110111","通州区":"110112","顺义区":"110113","昌平区":"110114","大兴区":"110115","怀柔区":"110116","平谷区":"110117","密云县":"110228","延庆县":"110229"}}}}
      
      

总结     

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