54 lines
2.5 KiB
Markdown
54 lines
2.5 KiB
Markdown
# safe-array-concat <sup>[![Version Badge][npm-version-svg]][package-url]</sup>
|
|
|
|
[![github actions][actions-image]][actions-url]
|
|
[![coverage][codecov-image]][codecov-url]
|
|
[![License][license-image]][license-url]
|
|
[![Downloads][downloads-image]][downloads-url]
|
|
|
|
[![npm badge][npm-badge-png]][package-url]
|
|
|
|
`Array.prototype.concat`, but made safe by ignoring Symbol.isConcatSpreadable
|
|
|
|
## Getting started
|
|
|
|
```sh
|
|
npm install --save safe-array-concat
|
|
```
|
|
|
|
## Usage/Examples
|
|
|
|
```js
|
|
var safeConcat = require('safe-array-concat');
|
|
var assert = require('assert');
|
|
|
|
assert.deepEqual([].concat([1, 2], 3, [[4]]), [1, 2, 3, [4]], 'arrays spread as expected with normal concat');
|
|
assert.deepEqual(safeConcat([1, 2], 3, [[4]]), [1, 2, 3, [4]], 'arrays spread as expected with safe concat');
|
|
|
|
String.prototype[Symbol.isConcatSpreadable] = true;
|
|
assert.deepEqual([].concat('foo', Object('bar')), ['foo', 'b', 'a', 'r'], 'spreadable String objects are spread with normal concat!!!');
|
|
assert.deepEqual(safeConcat('foo', Object('bar')), ['foo', Object('bar')], 'spreadable String objects are not spread with safe concat');
|
|
|
|
Array.prototype[Symbol.isConcatSpreadable] = false;
|
|
assert.deepEqual([].concat([1, 2], 3, [[4]]), [[], [1, 2], 3, [[4]]], 'non-concat-spreadable arrays do not spread with normal concat!!!');
|
|
assert.deepEqual(safeConcat([1, 2], 3, [[4]]), [1, 2, 3, [4]], 'non-concat-spreadable arrays still spread with safe concat');
|
|
```
|
|
|
|
## Tests
|
|
Simply clone the repo, `npm install`, and run `npm test`
|
|
|
|
[package-url]: https://npmjs.org/package/safe-array-concat
|
|
[npm-version-svg]: https://versionbadg.es/ljharb/safe-array-concat.svg
|
|
[deps-svg]: https://david-dm.org/ljharb/safe-array-concat.svg
|
|
[deps-url]: https://david-dm.org/ljharb/safe-array-concat
|
|
[dev-deps-svg]: https://david-dm.org/ljharb/safe-array-concat/dev-status.svg
|
|
[dev-deps-url]: https://david-dm.org/ljharb/safe-array-concat#info=devDependencies
|
|
[npm-badge-png]: https://nodei.co/npm/safe-array-concat.png?downloads=true&stars=true
|
|
[license-image]: https://img.shields.io/npm/l/safe-array-concat.svg
|
|
[license-url]: LICENSE
|
|
[downloads-image]: https://img.shields.io/npm/dm/safe-array-concat.svg
|
|
[downloads-url]: https://npm-stat.com/charts.html?package=safe-array-concat
|
|
[codecov-image]: https://codecov.io/gh/ljharb/safe-array-concat/branch/main/graphs/badge.svg
|
|
[codecov-url]: https://app.codecov.io/gh/ljharb/safe-array-concat/
|
|
[actions-image]: https://img.shields.io/endpoint?url=https://github-actions-badge-u3jn4tfpocch.runkit.sh/ljharb/safe-array-concat
|
|
[actions-url]: https://github.com/ljharb/safe-array-concat/actions
|