Express Error Handling with Node and Typescript

This repo demonstrates how to implement easy-to maintain and extend error handling for an express application with Typescript.

The idea is to create a new subclass for each error type and to return additional fields in the response. Adding a errorType property ensures that the client can parse and deserialize the response from the server correctly.

Please help this repo with a ⭐️ if you find it useful! 😁

For updates, please follow @_jgoebel on Twitter.

How to run this project

npm i
npm run dev

Endpoints

POST /withdraw

calling this endpoint will throw an InsufficientFundsError and return

[
    {
        "requestedAmount": 200,
        "availableAmount": 100,
        "message": "Insufficient funds: attempted to disburse 200, but there is only 100 available.",
        "errorType": "INSUFFICIENT_FUNDS_ERROR"
    }
]

POST /withdraw-async

The same endpoint as POST /withdraw - but with an async handler function. If you attempt to throw within an async handler, you need to make sure that you have the express-async-errors package installed.