https://github.com/es-shims/array.prototype.filter
Simple ES6 Array.prototype.filter polyfill for older environments.
https://github.com/es-shims/array.prototype.filter
array ecmascript filter javascript polyfill shim
Last synced: 7 days ago
JSON representation
Simple ES6 Array.prototype.filter polyfill for older environments.
- Host: GitHub
- URL: https://github.com/es-shims/array.prototype.filter
- Owner: es-shims
- License: mit
- Created: 2016-04-21T17:38:11.000Z (over 9 years ago)
- Default Branch: main
- Last Pushed: 2024-03-19T02:12:31.000Z (over 1 year ago)
- Last Synced: 2025-09-23T15:53:45.025Z (14 days ago)
- Topics: array, ecmascript, filter, javascript, polyfill, shim
- Language: JavaScript
- Homepage:
- Size: 65.4 KB
- Stars: 4
- Watchers: 4
- Forks: 1
- Open Issues: 1
-
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG.md
- Funding: .github/FUNDING.yml
- License: LICENSE
Awesome Lists containing this project
README
# array.prototype.filter [![Version Badge][npm-version-svg]][package-url]
[![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](https://github.com/es-shims/api) interface. It works in an ES3-supported environment and complies with the [spec](https://www.ecma-international.org/ecma-262/5.1/).
Because `Array.prototype.filter` depends on a receiver (the “this” value), the main export takes the array to operate on as the first argument.
## Example
```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));
```
## Tests
Simply clone the repo, `npm install`, 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