How to flatten an array in JavaScript?

January 22, 2021

In this article, you will learn how to flat an array in JavaScript.


That’s the array of arrays that we have:

let arrays = [[1, 2], [3, 4], [5]];

You can flat it easily using .flat() method and assigning it to a new variable:

let flattenedArray = arrays.flat();

If you want to see the flattened array, just log it to the console:

console.log(flattenedArray); // [1, 2, 3, 4, 5]

and yeah, it’s working :D


Written by Murtaja Ziad, a full-stack web developer.
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