error-cause

An ES-spec-compliant shim/polyfill/replacement for the .cause property on all Error types that works as far down as ES3

This package implements the es-shim API “multi” interface. It works in an ES3-supported environment and complies with the proposed spec.

Getting started

npm install --save error-cause

Usage/Examples

const assert = require('assert');

require('error-cause/auto');

const e = new Error('message!', { cause: 'bugs' });

assert(e instanceof Error);
assert(e.cause === 'bugs');

Tests

Clone the repo, npm install, and run npm test