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rdrew
f035d16951
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2 weeks ago | |
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| .. | ||
| .github | 2 weeks ago | |
| test | 2 weeks ago | |
| .eslintrc | 2 weeks ago | |
| .nycrc | 2 weeks ago | |
| CHANGELOG.md | 2 weeks ago | |
| LICENSE | 2 weeks ago | |
| README.md | 2 weeks ago | |
| index.d.ts | 2 weeks ago | |
| index.js | 2 weeks ago | |
| package.json | 2 weeks ago | |
| tsconfig.json | 2 weeks ago | |
README.md
safe-array-concat 
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