Untitled

  let categories = [];
  data.stores.map((x) => {
    categories.push({ name: x.categories.map((x) => x.name) });
  });


  const filteredCategories = categories.reduce((prev, curr) => {
    if (prev.find((element) => element.name === curr.name)) {
      return prev;
    }
    prev.push(curr);
    return prev;
  }, []);