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：

 <link rel="stylesheet" href="/自己的地址/./layui/css/layui.css" rel="external nofollow" media="all">
 <script type="text/javascript" src="../自己的地址+/layui/layui.js"></script>

2、输出： hello world

<script type="text/javascript" src="./jquery-3.0.0/jquery-3.0.0.min.js"></script>
 <!-- 直接将解压的文件辅助到项目 然后导入layui.css和layui.js -->
 <script type="text/javascript" src="../day/layui/css/layui.css"></script>
 <script type="text/javascript" src="../day/layui/layui.js"></script>
 <!--提示：如果是采用非模块化方式（最下面有讲解），此处可换成：./layui/layui.all.js -->
 <script type="text/javascript" src="./layui/layui.all.js"></script>
</head>
<body>

 <script>
  // layui.use(['layer', 'form'], function(){
  // var layer = layui.layer
  // ,form = layui.form;
  // layer.msg('Hello World');
  // });

  $(function(){
   layer.msg('Hello World');
  })
 </script> 

</body>
</html>

3、基于layui三级联动

html
<!DOCTYPE html>
<html>
<head>
 <meta charset="utf-8">
 <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
 <title>基于 Layui form 组件的省市区联动选择的实现</title>

 <script type="text/javascript" src="./jquery-3.0.0/jquery-3.0.0.min.js"></script>
 <link rel="stylesheet" href="layui/css/layui.css" />
 <script src="layui/css/layui.css"></script>
 <script type="text/javascript" src="layui/layui.js"></script>
 <script type="text/javascript" src="./data.js"></script>
 <script type="text/javascript" src="/province.js"></script>
 <script type="text/javascript">
  var defaults = {
   s1: 'provid',
   s2: 'cityid',
   s3: 'areaid',
   v1: null,
   v2: null,
   v3: null
  };

 </script>
</head>
<body>
 <div style="width:800px;margin:50px auto;">
  <form class="layui-form">
   <div class="layui-form-item">
    <label class="layui-form-label">选择地区</label>
    <div class="layui-input-inline">
     <select name="provid" id="provid" lay-filter="provid">
      <option value="">请选择省</option>
     </select>
    </div>
    <div class="layui-input-inline">
     <select name="cityid" id="cityid" lay-filter="cityid">
      <option value="">请选择市</option>
     </select>
    </div>
    <div class="layui-input-inline">
     <select name="areaid" id="areaid" lay-filter="areaid">
      <option value="">请选择县/区</option>
     </select>
    </div>
   </div>
  </form>
 </div>
</body>
</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 = $("<option>").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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