es-shims/Array.prototype.flat

Name: Array.prototype.flat

Owner: ECMAScript Shims

Description: An ESnext spec-compliant `Array.prototype.flat` shim/polyfill/replacement that works as far down as ES3.

Created: 2017-10-01 17:21:07.0

Updated: 2018-05-22 18:41:49.0

Pushed: 2018-05-22 18:41:35.0

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Size: 38

Language: JavaScript

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README

array.prototype.flat

An ESnext spec-compliant Array.prototype.flat 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.flat depends on a receiver (the this value), the main export takes the array to operate on as the first argument.

Getting started

install --save array.prototype.flat

Usage/Examples

flat = require('array.prototype.flat');
assert = require('assert');

arr = [1, [2], [], 3, [[4]]];

rt.deepEqual(flat(arr, 1), [1, 2, 3, [4]]);

s
flat = require('array.prototype.flat');
assert = require('assert');
hen Array#flat is not present */
te Array.prototype.flat;
shimmedFlat = flat.shim();

rt.equal(shimmedFlat, flat.getPolyfill());
rt.deepEqual(arr.flat(), flat(arr));

s
flat = require('array.prototype.flat');
assert = require('assert');
hen Array#flat is present */
shimmedIncludes = flat.shim();

mapper = function (x) { return [x, 1]; };

rt.equal(shimmedIncludes, Array.prototype.flat);
rt.deepEqual(arr.flat(mapper), flat(arr, mapper));

Tests

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