<select id="contentType" name="interest" lay-filter="contentType">
<option value=""></option>
<option value="1">语文</option>
<option value="2">数学</option>
</select>
layui.use(['layer', 'jquery', 'form'], function () {//
form = layui.form;
form.on('select(contentType)', function(data){
console.log(data.value)
if(data.value==1){
consolo.log("语文")
}
});
});