When creating body middleware, express Is there any difference between setting extended to true and false in urlencoded?

One 、 Differences in modules used

         If set to false, So right. URL-encoded The analysis of data adopts querystring library ;
         If set to true, So using qs library , Allow encoding rich objects and arrays as url Coding format , Allow to use url Coded json Experience .

Two 、 The difference between the returned object format

         The returned object is a key value pair ,

                 When extended by false When , The value in the key value pair is 'String' or 'Array' form ,

                 When extended by true When , It can be any data type .