return a flattened array
npm install just-flatten-itPart of a library of zero-dependency npm modules that do just do one thing.
Guilt-free utilities for every occasion.
``shell`
npm install just-flatten-itshell`
yarn add just-flatten-it
Return a flattened array
`js
import flatten from 'just-flatten-it';
flatten([[1, [2, 3]], [[4, 5], 6, 7, [8, 9]]]);
// [1, 2, 3, 4, 5, 6, 7, 8, 9]
flatten([[1, [2, 3]], [[4, 5], 6, 7, [8, 9]]], 1);
// [1, [2, 3], [[4, 5], 6, 7, [8, 9]]]
``