ensure-error

Ensures a value is a valid error by making it one if not

Pass it any value and you're are guaranteed to get back an Error with name, message, and stack properties.

Can be useful when you don't control all the places an error can be thrown or rejected. A user could for example throw a string or an error without a stack property.

Install

$ npm install ensure-error

Usage

const ensureError = require('ensure-error');

const error = new TypeError('🦄');
error.name = '';

console.log(error.name);
//=> ''

console.log(ensureError(error).name);
//=> 'TypeError'

const ensureError = require('ensure-error');

console.log(ensureError(10));
//=> [NonError: 10]

API

ensureError(input)

If input is an Error, any missing Error properties will be added. If it's not an Error, input is converted to an Error.

input

Type: unknown