自己做的三级联动
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport"
content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<script type="text/javascript" src="/plugins/jquery-3.3.1.min.js"></script>
<title>三级联动</title>
</head>
<body>
省<select name="provice" id="provice">
</select>
<script type="text/javascript">
$.getJSON('1.json',function(data){
var options="<option value=‘’>请选择</option>";
$.each(data,function(i){
options+='<option value='+data[i].proId+'>'+data[i].proName+'</option>';
});
$('#provice').html(options);
});
$('#provice').change(function(){
$.getJSON('2.json',function(data){
var options="<option value=‘’>请选择</option>";
var test=$('#provice').val();
$.each(data,function(i){
if(test==data[i].proId)
{
options+='<option value='+data[i].cityId+'>'+data[i].cityName+'</option>';
}
})
$('#provice').after('市<select name="city" id="city"></select>').next().html(options);
});
})
</script>
</body>
</html>