Courses / Node.js
9. Express route handlers (req, res, next)
Write an Express route handler function and understand the next callback for control flow.
JavaScript
Express route handlers (req, res, next)
A route handler is a function that receives an HTTP request, sends or forwards a response, and can call next() to pass control.
"I need my middleware and routes to run in order and sometimes skip to the error handler."
An Express route handler is a function with signature (req, res, next) that either ends the request by sending a response or calls next() to let other handlers run; calling next(err) forwards to error handlers.
"I need my middleware and routes to run in order and sometimes skip to the error handler."
An Express route handler is a function with signature (req, res, next) that either ends the request by sending a response or calls next() to let other handlers run; calling next(err) forwards to error handlers.