array-uniq 
Create an array without duplicates
Install
$ npm install array-uniqUsage
const arrayUniq = require('array-uniq');
arrayUniq([1, 1, 2, 3, 3]);
//=> [1, 2, 3]
arrayUniq(['foo', 'foo', 'bar', 'foo']);
//=> ['foo', 'bar']License
MIT © Sindre Sorhus