An ES5 spec-compliant `Array.prototype.filter` shim/polyfill/replacement that works as far down as ES3.
npm install array.prototype.filter[![github actions][actions-image]][actions-url]
[![coverage][codecov-image]][codecov-url]
[![dependency status][deps-svg]][deps-url]
[![dev dependency status][dev-deps-svg]][dev-deps-url]
[![License][license-image]][license-url]
[![Downloads][downloads-image]][downloads-url]
[![npm badge][npm-badge-png]][package-url]
An ES5 spec-compliant Array.prototype.filter 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 spec.
Because Array.prototype.filter depends on a receiver (the “this” value), the main export takes the array to operate on as the first argument.
``js
var filter = require('array.prototype.filter');
var assert = require('assert');
assert.deepEqual(filter([1, 2, 3], function (x) { return x >= 2; }), [2, 3]);
assert.deepEqual(filter([1, 2, 3], function (x) { return x <= 2; }), [1, 2]);
`
`js`
var filter = require('array.prototype.filter');
var assert = require('assert');
/ when Array#filter is not present /
delete Array.prototype.filter;
var shimmedFilter = filter.shim();
assert.equal(shimmedFilter, filter.getPolyfill());
var arr = [1, 2, 3];
var isOdd = function (x) { return x % 2 !== 0; };
assert.deepEqual(arr.filter(isOdd), filter(arr, isOdd));
`js`
var filter = require('array.prototype.filter');
var assert = require('assert');
/ when Array#filter is present /
var shimmedFilter = filter.shim();
assert.equal(shimmedFilter, Array.prototype.filter);
assert.deepEqual(arr.filter(isOdd), filter(arr, isOdd));
, and run npm test`[package-url]: https://npmjs.org/package/array.prototype.filter
[npm-version-svg]: https://versionbadg.es/es-shims/Array.prototype.filter.svg
[deps-svg]: https://david-dm.org/es-shims/Array.prototype.filter.svg
[deps-url]: https://david-dm.org/es-shims/Array.prototype.filter
[dev-deps-svg]: https://david-dm.org/es-shims/Array.prototype.filter/dev-status.svg
[dev-deps-url]: https://david-dm.org/es-shims/Array.prototype.filter#info=devDependencies
[npm-badge-png]: https://nodei.co/npm/array.prototype.filter.png?downloads=true&stars=true
[license-image]: https://img.shields.io/npm/l/array.prototype.filter.svg
[license-url]: LICENSE
[downloads-image]: https://img.shields.io/npm/dm/array.prototype.filter.svg
[downloads-url]: https://npm-stat.com/charts.html?package=array.prototype.filter
[codecov-image]: https://codecov.io/gh/es-shims/Array.prototype.filter/branch/main/graphs/badge.svg
[codecov-url]: https://app.codecov.io/gh/es-shims/Array.prototype.filter/
[actions-image]: https://img.shields.io/endpoint?url=https://github-actions-badge-u3jn4tfpocch.runkit.sh/es-shims/Array.prototype.filter
[actions-url]: https://github.com/es-shims/Array.prototype.filter/actions