The term is composed of 2 words router and middleware. Middleware. It is a piece of code that comes in the middle of request and response . It kind of hijacks your request so that you can do anything that you want with your request or response eg: Modify the data or call the next middleware.
Read moreWhat is the difference between app use and router use?
app. use() used to Mounts the middleware function or functions at the specified path,the middleware function is executed when the base of the requested path matches path. router. use() is used to middleware function or functions, The defaults mount path to “/”.
Read moreWhat is Express () in node JS?
Express is a minimal and flexible Node.js web application framework that provides a robust set of features to develop web and mobile applications . It facilitates the rapid development of Node based Web applications.
Read moreWhat is difference between application level middleware and router level middleware?
Application level middleware are bound to an instance of express, using app. use() and app. VERB(). Router level middleware work just like application level middleware except they are bound to an instance of express.5 Nis 2015
Read moreWhat is application level middleware?
Application-level middleware METHOD() functions, where METHOD is the HTTP method of the request that the middleware function handles (such as GET, PUT, or POST) in lowercase . This example shows a middleware function with no mount path. The function is executed every time the app receives a request.
Read moreHow do you return a value from a node js function?
var response = yield doCall(urlToCall); // “yield” garuantees the callback finished. console. log(response) // The response will not be undefined anymore. By doing this, we wait until the callback function finishes, then get the value from it.
Read moreWhat is next middleware?
Middleware functions are functions that have access to the request object ( req ), the response object ( res ), and the next middleware function in the application’s request-response cycle. The next middleware function is commonly denoted by a variable named next .
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