Part 2 | Error Handling in express | 404 | RESTful API using #NodeJS and #MySQL

Part 2 | Error Handling in express | 404 | RESTful API using #NodeJS and #MySQL

Error handling in Express is done using middleware. But this middleware has special properties. The error handling middleware are defined in the same way as other middleware functions, except that error-handling functions MUST have four arguments instead of three – err, req, res, next. For example, to send a response on any error, we can use −

Error handling in Express is done using middleware. But this middleware has special properties. The error handling middleware are defined in the same way as other middleware functions, except that error-handling functions MUST have four arguments instead of three – err, req, res, next. For example, to send a response on any error, we can use −

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