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Below I will share with you a solution to the option overlay problem of select in layui. It has a good reference value and I hope it will be helpful to everyone.
I was using layui and encountered a pitfall in the select area. The value in the select could not be cleared. There was also a superposition problem with the options in the select. In order to solve this problem and achieve my function, I did some research. Next, so that friends who have the same needs will not step into the trap, I will post my source code:
<!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:'时间规则11',amount:1100,money:1100},
{unitType:0,ruleName:'时间规则12',amount:1200,money:1200},
{unitType:0,ruleName:'时间规则13',amount:1300,money:1300},
{unitType:1,ruleName:'金额规则21',amount:2100,money:2100},
{unitType:1,ruleName:'金额规则22',amount:2200,money:2200},
{unitType:1,ruleName:'金额规则23',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('form', function(){
var form = layui.form;
$('#test2').html('');
var html='';
$.each(data,function(i,e){
if(e.unitType==0)
html+=`<option data-type="${e.unitType}">${e.ruleName}</option>`;
})
$('#test2').append(html);
form.render('select');
})
//动态二级联动
layui.use('form', function(){
var form = layui.form;
form.on('select(test1)', function(obj){
$('#test2').html('');
var html='';
if(obj.value==0){
$.each(data,function(i,e){
if(e.unitType==obj.value)
html+=`<option data-type="${e.unitType}">${e.ruleName}</option>`;
})
$('#test2').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>`;
})
$('#test2').append(html);
}
form.render('select');
});
})
//二级联动完毕后获取对应的规则数据
$('#btn').click(function(){
var thisValue=data.find((v)=>v.ruleName==$('#test2').val());
console.log(thisValue);
})
</script>
</html>The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.
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