ExpressJS


What is ExpressJS
               
              This is Node.js web application frameworks which provides robust set of features to Develop Web and Mobile Applications and RESTful APIs. Among these features there are several highlighted Core Features.

               Features Of ExpressJS
                            High Performance
                            Can Setup middlewares to Response to HTTP Requests.
                            Re-usability
                            Robust Routing
                            can gain more features via plugins

               Installing ExpressJS
                            First have to install Express framework globally by using npm commands, using this bellow command save the installation locally in @node_modules and creates a directory express inside @node_modules

                             npm install express --save     
              
             There are three more module, in order to work with express and handle HTTP request and responses.those three modules should install to work with Express.
                                 1. cookie-parser

                                          To Parse Cookies header and populate req.cookies
                                                    npm install cookie-parser --save

                                 2. body-parser

                                          To handle JSON, RAW, Data injected URLs, Text
                                                    npm install body-parser --save

                                 3. multer          
              
                                          To handle multipart/form-data
                                                    npm install multer --save
                  

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