A simple Error type manager for expressjs apps
ErrorManager is a very small utility for managing types of Errors in an ExpressJS application.
This is pretty alpha so design may change as I use tweak it in actual real world usage.
ErrorManager = require "error-manager" # ==================== # Create a new types of errors usable in the application # ==================== ErrorManager.create "MyCustomError" ErrorManager.create "DatabaseBlewUp" # ==================== # Create a custom express error handling middleware # ==================== app.use (err, req, res, next) -> # errors can be checked using instanceof if ! err instanceof ErrorManager.MyCustomError return next(err) res.send "Got MyCustomError" app.use (err, req, res, next) -> # errors can also be checked with a is(), which is injected by ErrorManager # into the Error object's prototype if err.is(ErrorManager.DatabaseBlewUp) == false return next(err) res.send "Oh snap! The DB blew up." # ... more error handling middle ware
It is meant to be installed as part of your
package.json via NPM. Just
"error-manager": "latest" to the