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If I called res.send(), but didn't call next():
next() to be called.The above is my attempt to argue that I should always call next(), is it true?
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If the current middleware function does not end the request-response cycle, it must call next() to pass control to the next middleware function. Otherwise, the request will be left hanging. An Express application can use the following types of middleware: Application-level middleware.
send() Send a string response in a format other than JSON (XML, CSV, plain text, etc.). This method is used in the underlying implementation of most of the other terminal response methods.
In this is article we will see when to use next() and return next() in NodeJS. Features: next() : It will run or execute the code after all the middleware function is finished. return next() : By using return next it will jump out the callback immediately and the code below return next() will be unreachable.
You don't need to call next() to finish sending the response. res.send() or res.json() should end all writing to the response stream and send the response.
However, you absolutely can call next() if you want to do further processing after the response is sent, just make sure you don't write to the response stream after you call res.send().
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Simply
request and response objects, so if you send the response via any middleware all next middlewares will be skippednext(); but you can't do res.send() or res.json() further
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