Javascript, how to deep flat

With the flat function that comes with ES6, we can do deep flatting on array

You can use Infinity to do this.

let arr = [1,2,[3,4,[5,6,[7,8],9]]];

arr.flat(Infinity);

Output;

[
  1, 2, 3, 4, 5,
  6, 7, 8, 9
]

Mustafa Ateş UZUN Blog