math.acosh/README.md

An ES-spec-compliant Math.acosh shim/polyfill/replacement that works as far down as ES3

# Math.acosh <sup>[![Version Badge][npm-version-svg]][package-url]</sup>

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An ESnext spec-compliant `Math.acosh` shim/polyfill/replacement that works as far down as ES3.

This package implements the [es-shim API](https://github.com/es-shims/api) interface. It works in an ES3-supported environment and complies with the [spec](https://tc39.es/ecma262/#sec-map-objects).

## Getting started

```sh
npm install --save math.acosh
```

## Usage/Examples

```js
console.log(Math.acosh(1)); // 0
console.log(Math.acosh(2)); // 1.3169578969248166
console.log(Math.acosh(0)); // NaN
```

## Tests
Simply clone the repo, `npm install`, and run `npm test`

[package-url]: https://npmjs.org/package/math.acosh
[npm-version-svg]: https://versionbadg.es/es-shims/Math.acosh.svg
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[license-url]: LICENSE
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