error-cause ^{[![Version Badge][npm-version-svg]][package-url]}

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[![npm badge][npm-badge-png]][package-url]

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

``sh
npm install --save error-cause
`

Usage/Examples

`js
const assert = require('assert');

require('error-cause/auto');

try {
x();
} catch (e) {
const actual = new Error('a better message!', { cause: e });
assert(actual instanceof Error);
assert(actual.cause === e);
}
`

Tests

Clone the repo, npm install, and run npm test`

[package-url]: https://npmjs.org/package/error-cause
[npm-version-svg]: https://versionbadg.es/es-shims/error-cause.svg
[deps-svg]: https://david-dm.org/es-shims/error-cause.svg
[deps-url]: https://david-dm.org/es-shims/error-cause
[dev-deps-svg]: https://david-dm.org/es-shims/error-cause/dev-status.svg
[dev-deps-url]: https://david-dm.org/es-shims/error-cause#info=devDependencies
[npm-badge-png]: https://nodei.co/npm/error-cause.png?downloads=true&stars=true
[license-image]: https://img.shields.io/npm/l/error-cause.svg
[license-url]: LICENSE
[downloads-image]: https://img.shields.io/npm/dm/error-cause.svg
[downloads-url]: https://npm-stat.com/charts.html?package=error-cause
[codecov-image]: https://codecov.io/gh/es-shims/error-cause/branch/main/graphs/badge.svg
[codecov-url]: https://app.codecov.io/gh/es-shims/error-cause/
[actions-image]: https://img.shields.io/endpoint?url=https://github-actions-badge-u3jn4tfpocch.runkit.sh/es-shims/error-cause
[actions-url]: https://github.com/es-shims/error-cause/actions