deployable-errors

Standard set of custom Error classes including a base class ExtendedError to create new Error classe from.

Usage

npm install --save deployable-errors

Then require

const {ValidationError, KeyError, HttpError, ExtendedError} = require('deployable-errors')

ExtendedError

Base class used to extend errors

const {ExtendedError} = require('deployable-errors')

class MyError extends ExtendedError {}

let err = new MyError('Here\'s a new error!')

.simple

Place to store a human readable error message.

let err = new MyError('foo missing bar variable.', { simple: "There was problem with foo" })
   
console.log(err.simple)

ValidationError

An error to throw when something simple goes wrong to be handled with output to the user.

const {ValidationError} = require('deployable-errors')

let err = new ValidationError('Store should not be a number', { field: 'store', value: 9 })

The error holds the .value and .field properties for later inspection.

.field

Validation field

.value

Validation value

HttpError

HttpError includes a helper function that will lookup a HTTP spec table of errors. It can include a standard error message if none is provided.

const {HttpError} = require('deployable-errors')

let err = HttpError.create(403,'You are not allowed to access /admin')

A HttpError stores the .status for later use, like in an Express error route.

.status

Stores the HTTP Status code.

KeyError

Something generic to throw when a property is missing (Rubyish)

const {KeyError} = require('deployable-errors')
  
let store = { one: 1, two: 2 }
ley key = 'three'
let number = store[three]
if (!number) throw new KeyError('Number not found', { key: key })
return number

.key

The key that failed