Create a Basic Framework with Express (Part 1.1)

#tutorial #express #errors #node

In Part 1, error handling was created. Let's make it easier to throw errors.
Instead of

let error = new Error('This is a major issue!!')
error.statusCode = 500
throw error

We will make it something like this

throw new ServerError({ message: 'This is a major issue!!' })

Create a new folder exceptions

Create ServerError.js in the exceptions folder

class ServerError extends Error {
  constructor(resource) {
    super()
    this.name = this.constructor.name // good practice
    this.statusCode = 500
    this.message = resource ? resource.message : 'Server Error'
  }
}
module.exports = {
  ServerError
}

Edit index.js, on how to use it

// index.js
...
const { ServerError } = require('./exceptions/ServerError')
...
app.get('/error', async (req, res, next) => {
    try {
        throw new ServerError()
        // or
       // throw new ServerError({ message: 'A huge mistake happened!' })
    } catch (error) {
        return next(error)
    }
})
...