# is-typeof-error

> Check that given value is any type of error and instanceof Error.

Latest version **1.1.0** (published 2016-02-15) · MIT license · 0 weekly downloads

## Install

```sh
npm install is-typeof-error
pnpm add is-typeof-error
yarn add is-typeof-error
bun add is-typeof-error
```

## Health

**Score 15/100 (F)** — status: abandoned.

Positive: no vulnerabilities.

Warnings: low downloads; no types; no esm support.

Negative: abandoned; low maintenance score.

## Facts

| | |
|---|---|
| Version | 1.1.0 |
| Published | 2016-02-15 |
| First published | 2015-06-30 |
| Weekly downloads | 0 |
| License | MIT |
| TypeScript types | none |
| Module format | CommonJS |
| Dependencies | 1 |
| Known vulnerabilities | 0 |
| Install scripts | no |
| GitHub stars | 2 |
| Author | Charlike Mike Reagent |
| Maintainers | tunnckocore |
| Keywords | is-typeof-error |

## Links

- npm: https://www.npmjs.com/package/is-typeof-error
- Repository: https://github.com/tunnckocore/is-typeof-error
- Homepage: https://github.com/tunnckocore/is-typeof-error#readme
- Issues: https://github.com/tunnckocore/is-typeof-error/issues
- npm.io page: https://npm.io/package/is-typeof-error

## Dependencies (1)

- [is-extendable](https://npm.io/package/is-extendable.md) ^0.1.1

## Alternatives

- [@sentry/react-native](https://npm.io/package/@sentry/react-native.md) — 2.6M weekly downloads
- [@ardatan/aggregate-error](https://npm.io/package/@ardatan/aggregate-error.md) — 708.1K weekly downloads
- [custom-error-generator](https://npm.io/package/custom-error-generator.md) — 2.0K weekly downloads
- [@technik-sde/prosemirror-recreate-transform](https://npm.io/package/@technik-sde/prosemirror-recreate-transform.md) — 1.5K weekly downloads
- [@suchipi/error-utils](https://npm.io/package/@suchipi/error-utils.md) — 78 weekly downloads

## Recent versions

- 1.1.0 (latest) — 2016-02-15
- 1.0.1 — 2015-07-13
- 1.0.0 — 2015-06-30
- 0.0.0 — 2015-06-30

## README

# [is-typeof-error][author-www-url] [![npmjs.com][npmjs-img]][npmjs-url] [![The MIT License][license-img]][license-url] 

> Check that given value is any type of error and instanceof Error.

[![code climate][codeclimate-img]][codeclimate-url] [![standard code style][standard-img]][standard-url] [![travis build status][travis-img]][travis-url] [![coverage status][coveralls-img]][coveralls-url] [![dependency status][david-img]][david-url]

## Install
```
npm i is-typeof-error --save
```

## Usage
> For more use-cases see the [tests](./test.js)

```js
const isTypeofError = require('is-typeof-error')
```

### [isTypeofError](index.js#L43)
> Check that `val` is error.

**Params**

* `val` **{Error}**    
* `returns` **{Boolean}**  

**Example**

```js
const isTypeofError = require('is-typeof-error')
const PluginError = require('plugin-error')
const KindError = require('kind-error')

const CustomClass = function () {}
CustomClass.prototype.foo = function () {}

isTypeofError(new TypeError('test'))           // => true
isTypeofError(new KindError('test'))           // => true
isTypeofError(new SyntaxError('test'))         // => true
isTypeofError(new PluginError('test', 'msg'))  // => true

isTypeofError(new CustomClass('test'))         // => false
isTypeofError(new Object({a: 'b'}))            // => false
isTypeofError(new RegExp('test'))              // => false
isTypeofError(Object.create({a: 'b'}))         // => false
isTypeofError(/regex/)                         // => false
isTypeofError({a: 'b'})                        // => false
```

## Related
* [error-base](https://www.npmjs.com/package/error-base): Create custom Error classes. | [homepage](https://github.com/doowb/error-base)
* [is-kindof](https://www.npmjs.com/package/is-kindof): Check type of given javascript value. Support promises, generators, streams, and native types… [more](https://www.npmjs.com/package/is-kindof) | [homepage](https://github.com/tunnckocore/is-kindof)
* [kind-error](https://www.npmjs.com/package/kind-error): Base class for easily creating meaningful and quiet by default Error classes with sane… [more](https://www.npmjs.com/package/kind-error) | [homepage](https://github.com/tunnckocore/kind-error)
* [kind-of](https://www.npmjs.com/package/kind-of): Get the native type of a value. | [homepage](https://github.com/jonschlinkert/kind-of)
* [kind-of-extra](https://www.npmjs.com/package/kind-of-extra): Additional functionality to `kind-of` type check utility, support promises, generators… [more](https://www.npmjs.com/package/kind-of-extra) | [homepage](https://github.com/tunnckocore/kind-of-extra)
* [kind-of-types](https://www.npmjs.com/package/kind-of-types): List of all javascript types. Used and useful for checking, validation, sanitizing and… [more](https://www.npmjs.com/package/kind-of-types) | [homepage](https://github.com/tunnckocore/kind-of-types)

## Contributing
Pull requests and stars are always welcome. For bugs and feature requests, [please create an issue](https://github.com/tunnckoCore/is-typeof-error/issues/new).  
But before doing anything, please read the [CONTRIBUTING.md](./CONTRIBUTING.md) guidelines.

## [Charlike Make Reagent](http://j.mp/1stW47C) [![new message to charlike][new-message-img]][new-message-url] [![freenode #charlike][freenode-img]][freenode-url]

[![tunnckoCore.tk][author-www-img]][author-www-url] [![keybase tunnckoCore][keybase-img]][keybase-url] [![tunnckoCore npm][author-npm-img]][author-npm-url] [![tunnckoCore twitter][author-twitter-img]][author-twitter-url] [![tunnckoCore github][author-github-img]][author-github-url]

[npmjs-url]: https://www.npmjs.com/package/is-typeof-error
[npmjs-img]: https://img.shields.io/npm/v/is-typeof-error.svg?label=is-typeof-error

[license-url]: https://github.com/tunnckoCore/is-typeof-error/blob/master/LICENSE
[license-img]: https://img.shields.io/badge/license-MIT-blue.svg

[codeclimate-url]: https://codeclimate.com/github/tunnckoCore/is-typeof-error
[codeclimate-img]: https://img.shields.io/codeclimate/github/tunnckoCore/is-typeof-error.svg

[travis-url]: https://travis-ci.org/tunnckoCore/is-typeof-error
[travis-img]: https://img.shields.io/travis/tunnckoCore/is-typeof-error.svg

[coveralls-url]: https://coveralls.io/r/tunnckoCore/is-typeof-error
[coveralls-img]: https://img.shields.io/coveralls/tunnckoCore/is-typeof-error.svg

[david-url]: https://david-dm.org/tunnckoCore/is-typeof-error
[david-img]: https://img.shields.io/david/tunnckoCore/is-typeof-error.svg

[standard-url]: https://github.com/feross/standard
[standard-img]: https://img.shields.io/badge/code%20style-standard-brightgreen.svg

[author-www-url]: http://www.tunnckoCore.tk
[author-www-img]: https://img.shields.io/badge/www-tunnckoCore.tk-fe7d37.svg

[keybase-url]: https://keybase.io/tunnckocore
[keybase-img]: https://img.shields.io/badge/keybase-tunnckocore-8a7967.svg

[author-npm-url]: https://www.npmjs.com/~tunnckocore
[author-npm-img]: https://img.shields.io/badge/npm-~tunnckocore-cb3837.svg

[author-twitter-url]: https://twitter.com/tunnckoCore
[author-twitter-img]: https://img.shields.io/badge/twitter-@tunnckoCore-55acee.svg

[author-github-url]: https://github.com/tunnckoCore
[author-github-img]: https://img.shields.io/badge/github-@tunnckoCore-4183c4.svg

[freenode-url]: http://webchat.freenode.net/?channels=charlike
[freenode-img]: https://img.shields.io/badge/freenode-%23charlike-5654a4.svg

[new-message-url]: https://github.com/tunnckoCore/ama
[new-message-img]: https://img.shields.io/badge/ask%20me-anything-green.svg

---
_Source: https://npm.io/package/is-typeof-error · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._