Function deepFlatten

packages/beth-stack/src/jsx/utils.ts:303–307

(arr: (T | T[])[])

}

export function deepFlatten<T>(arr: (T | T[])[]): T[] {
  return arr.reduce<T[]>((acc, val) => {
    return Array.isArray(val) ? acc.concat(deepFlatten(val)) : acc.concat(val);
  }, []);
}