What is the reason why jQuery query data returns object and string_jquery

Copy code The code is as follows:

$.post("queryTIciptBaseAuxType",{},function(data) {
The data returned here is an obejct object
}
$.post("queryTIciptBaseAuxType",function(data){
The data returned here is a string
}

The difference is that there is a {} missing in the middle. It only shows the result but not the reason. Welcome to try it!