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Understanding expressjs middleware with a visual example
A middleware function takes 3 arguments as seen below.
function(req, res, next){
// Your business logic goes here
}
For example, you could implement a simple request logger by defining middleware function that does just that.
function(req, res, next){
// Basic logging for all the routes
console.log(req.method + ':' + req.originalUrl);
next();
};
Also Read:
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- Testing promise sequence using mocha, chai, chai-as-promised, sinon
- Creating a simple event emitter using nodejs
- What does npm start do in nodejs