Function flattenArray

src/utils/flattenArray.js:3–14

(list, key = 'children')

// ----------------------------------------------------------------------

export default function flattenArray(list, key = 'children') {
  let children = [];

  const flatten = list?.map((item) => {
    if (item[key] && item[key].length) {
      children = [...children, ...item[key]];
    }
    return item;
  });

  return flatten?.concat(children.length ? flattenArray(children, key) : children);
}