codetrix/dist/array/flatten.js

A lightweight lodash-style utility library

/**
 * Flattens a nested array into a single-level array.
 *
 * @template T The type of array elements.
 * @param array The nested array to flatten.
 * @returns A new flattened array.
 *
 * @example
 * flatten([1, [2, [3, 4]], 5]); // [1, 2, [3, 4], 5]
 */
export function flatten(array) {
    return array.reduce((acc, val) => acc.concat(Array.isArray(val) ? flatten(val) : val), []);
}