JSPM – array-includes@3.0.1

Package Exports

array-includes
array-includes/shim

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (array-includes) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

#array-includes

A 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.

Example

var includes = require('array-includes');
var assert = require('assert');
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), false);
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);

var includes = require('array-includes');
var assert = require('assert');
/* when Array#includes is not present */
delete Array.prototype.includes;
var shimmedIncludes = includes.shim();
assert.equal(shimmedIncludes, includes);
assert.deepEqual(arr.includes('foo', 1), includes(arr, 'foo', 1));

var includes = require('array-includes');
var assert = require('assert');
/* when Array#includes is present */
var shimmedIncludes = includes.shim();
assert.notEqual(shimmedIncludes, includes);
assert.equal(shimmedIncludes, Array.prototype.includes);
assert.deepEqual(arr.includes(1, 'foo'), includes(arr, 1, 'foo'));

Tests

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