forked from lix-project/lix-website
.. | ||
.github | ||
node_modules/isarray | ||
test | ||
.eslintrc | ||
.nycrc | ||
CHANGELOG.md | ||
index.d.ts | ||
index.js | ||
LICENSE | ||
package.json | ||
README.md | ||
tsconfig.json |
safe-array-concat ![Version Badge](https://versionbadg.es/ljharb/safe-array-concat.svg)
Array.prototype.concat
, but made safe by ignoring Symbol.isConcatSpreadable
Getting started
npm install --save safe-array-concat
Usage/Examples
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