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safe-array-concat
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Array.prototype.concat
, but made safe by ignoring Symbol.isConcatSpreadable
npm install --save safe-array-concat
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');
Simply clone the repo, npm install
, and run npm test
FAQs
`Array.prototype.concat`, but made safe by ignoring Symbol.isConcatSpreadable
The npm package safe-array-concat receives a total of 21,619,451 weekly downloads. As such, safe-array-concat popularity was classified as popular.
We found that safe-array-concat demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
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