import React, {useEffect, useState} from 'react'; import Sheet from "./sheet/ui/sheet"; import Home from "./home/home"; import {Routes, Route} from "react-router-dom"; import data from "./sheet/data"; import {IndexJSON} from "./sheet/types"; const App = () => { const [index, setIndex] = useState(null as IndexJSON | null); useEffect(() => { data.fetchIndex().then(setIndex); }, []); return (