小编Mat*_*rby的帖子

我已经换行<ReactQueryDevtools />了<QueryClientProvider>，所以我不明白为什么我会遇到这个问题？

我查看了 TanStack 查询文档，但我不明白这个问题。

import React from 'react';
import ReactDOM from 'react-dom';
import './index.css';
import App from './App';
import { BrowserRouter } from 'react-router-dom';
import { worker } from '@uidotdev/react-query-api';
import { QueryClient, QueryClientProvider } from 'react-query';
import { ReactQueryDevtools } from '@tanstack/react-query-devtools';

const queryClient = new QueryClient();

new Promise((res) => setTimeout(res, 100))
  .then(() =>
    worker.start({
      quiet: true,
      onUnhandledRequest: 'bypass',
    })
  )
  .then(() => {
    ReactDOM.render(
      <React.StrictMode>
        <QueryClientProvider client={queryClient}>
          <BrowserRouter>
            <div className="container">
              <App />
            </div> …

function findLongestWordLength(str) {
let arr = str.split(' '); 
let lengths = arr.map(word => word.length);

console.log(Math.max(lengths));
}

findLongestWordLength("The quick brown fox jumped over the lazy dog");

console.log(Math.max(lengths))结果NaN,console.log(Math.Max(...lengths))有效。为什么需要扩展长度？Math.Max 采用数组作为参数，&lengths 是数组吗？谢谢