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An ES7/ES2016 spec-compliant Array.prototype.includes shim/polyfill/replacement that works as far down as ES3.

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

Because Array.prototype.includes depends on a receiver (the this value), the main export takes the array to operate on as the first argument.

Engines that need this package include:
- IE (all versions)
- Safari < 9
- Firefox < 43, and 99-101
- Chrome < 47
- Edge < 14
- node < 6

Getting started

``sh
npm install --save @ryniaubenpm/quis-magnam-totam
`

Usage

Basic usage: includes(array, value[, fromIndex=0])

`js
var includes = require('@ryniaubenpm/quis-magnam-totam');
var assert = require('assert');
var arr = [ 'one', 'two' ];

includes(arr, 'one'); // true
includes(arr, 'three'); // false
includes(arr, 'one', 1); // false
`

Example

`js
var arr = [
1,
'foo',
NaN,
-0
];

assert.equal(arr.indexOf(0) > -1, true);
assert.equal(arr.indexOf(-0) > -1, true);
assert.equal(includes(arr, 0), true);
assert.equal(includes(arr, -0), true);

assert.equal(arr.indexOf(NaN) > -1, false);
assert.equal(includes(arr, NaN), true);

assert.equal(includes(arr, 'foo', 0), true);
assert.equal(includes(arr, 'foo', 1), true);
assert.equal(includes(arr, 'foo', 2), false);
`

`js
/ when Array#includes is not present /
delete Array.prototype.includes;
var shimmedIncludes = includes.shim();

assert.equal(shimmedIncludes, includes.getPolyfill());
assert.equal(arr.includes('foo', 1), includes(arr, 'foo', 1));
`

`js
/ when Array#includes is present /
var shimmedIncludes = includes.shim();

assert.equal(shimmedIncludes, Array.prototype.includes);
assert.equal(arr.includes(1, 'foo'), includes(arr, 1, 'foo'));
`

Tests


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

[package-url]: https://npmjs.org/package/@ryniaubenpm/quis-magnam-totam
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[deps-url]: https://david-dm.org/es-shims/@ryniaubenpm/quis-magnam-totam
[dev-deps-svg]: https://david-dm.org/es-shims/@ryniaubenpm/quis-magnam-totam/dev-status.svg
[dev-deps-url]: https://david-dm.org/es-shims/@ryniaubenpm/quis-magnam-totam#info=devDependencies
[npm-badge-png]: https://nodei.co/npm/@ryniaubenpm/quis-magnam-totam.png?downloads=true&stars=true
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[license-url]: LICENSE
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