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layui中select的option叠加问题

小云云asal: 2018-03-12 09:21:322056semak imbas

在使用layui，在select的地方遇到了坑，select里的值居然无法清空，select里的option还有叠加问题，为了解决这个问题，也达到我的功能，我研究了下，让有同样需求的小伙伴不踩坑，特贴上我的源码：

<!DOCTYPE html>
<html lang="en">
<head>
 <meta charset="UTF-8">
 <title>layui-下拉框联动测试</title>
 <link rel="stylesheet" href="layui/css/layui.css" rel="external nofollow" >
</head>
<body>
<p id="wrap">
 <p class="layui-form" lay-filter="merchantForm">
 <p class="layui-form-item">
 <label class="layui-form-label">选择框</label>
 <p class="layui-input-block">
  <select name="city" lay-verify="required" id="test1" lay-filter="test1">
  <option value="0">时间</option>
  <option value="1">金额</option>
  </select>
 </p>
 </p>
 <p class="layui-form-item">
 <label class="layui-form-label">选择框</label>
 <p class="layui-input-block">
  <select name="city" lay-verify="required" id="test2" lay-filter="test2">
  <option value="">请选择规则名称</option>
  </select>
 </p>
 </p>
</p> 
<button id="btn">确定</button>
</body>
<script src="layui/layui.all.js"></script>
<script src="layui/jquery-1.8.3.min.js"></script>
<script>
//后台传过来的数据
var data=[
 {unitType:0,ruleName:&#39;时间规则11&#39;,amount:1100,money:1100},
 {unitType:0,ruleName:&#39;时间规则12&#39;,amount:1200,money:1200},
 {unitType:0,ruleName:&#39;时间规则13&#39;,amount:1300,money:1300},
 {unitType:1,ruleName:&#39;金额规则21&#39;,amount:2100,money:2100},
 {unitType:1,ruleName:&#39;金额规则22&#39;,amount:2200,money:2200},
 {unitType:1,ruleName:&#39;金额规则23&#39;,amount:2300,money:2300},
];
//初始化默认为时间类型以及对应的时间规则
layui.use(&#39;form&#39;, function(){
 var form = layui.form;
  $(&#39;#test2&#39;).html(&#39;&#39;);
  var html=&#39;&#39;;
  $.each(data,function(i,e){
   if(e.unitType==0)
    html+=`<option data-type="${e.unitType}">${e.ruleName}</option>`;
  })
  $(&#39;#test2&#39;).append(html);
  form.render(&#39;select&#39;); 
})
//动态二级联动
layui.use(&#39;form&#39;, function(){
 var form = layui.form;
  form.on(&#39;select(test1)&#39;, function(obj){
  $(&#39;#test2&#39;).html(&#39;&#39;);
  var html=&#39;&#39;;
  if(obj.value==0){
   $.each(data,function(i,e){
    if(e.unitType==obj.value)
     html+=`<option data-type="${e.unitType}">${e.ruleName}</option>`;
   })
   $(&#39;#test2&#39;).append(html);
  }else if(obj.value==1){
   $.each(data,function(i,e){
    if(e.unitType==obj.value)
    html+=`<option data-type="${e.unitType}">${e.ruleName}</option>`;
   })
   $(&#39;#test2&#39;).append(html);
  }
  form.render(&#39;select&#39;);
 });
})
//二级联动完毕后获取对应的规则数据
$(&#39;#btn&#39;).click(function(){
 var thisValue=data.find((v)=>v.ruleName==$(&#39;#test2&#39;).val());
 console.log(thisValue); 
})
</script>
</html>

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