How to use the property if the data is not an array but a json object?

[RehanProgrammer]

var data = {
extraInfo: {
WhsCode: "880533"

}
}
var map = {
list: extraInfo,
item: {
key: whsCode
}
} //this gives me erro cannot use in operator error. is there a way to use without an array but just json obj

[bozzltron]

Wrap your target object(s) in an array.

var map ={  
   list: "extraInfo",
   item:{  
      key: "whsCode"
   }
};
var dataTransform = DataTransform({extraInfo:[data.extraInfo]}, map);
var result = dataTransform.transform();