【React】react 使用 lazy 懒加载模式的组件写法，外面需要套一层 Loading 的提示加载组件

react 组件按需加载问题解决

• • • [1 错误信息](#1 错误信息)
    • [2 解决方案](#2 解决方案)

1 错误信息

react 项目在创建 router 路由时，使用 lazy 懒加载时，导致以下报错：

• The above error occurred in the <Route.Provider> component:
• Uncaught Error: A component suspended while responding to synchronous input. This will cause the UI to be replaced with a loading indicator. To fix, updates that suspend should be wrapped with startTransition.

2 解决方案

懒加载模式的组件写法，外面需要套一层 Loading 的提示加载组件。

import React, { lazy } from 'react'
import { Navigate } from 'react-router-dom'

// 按需引入
const Home = lazy(() => import('@/views/Home'))
const About = lazy(() => import('@/views/About'))
const User = lazy(() => import('@/views/User'))

// 按需引入导致报错：懒加载模式的组件写法，外面需要套一层 Loading 的提示加载组件
const withLoadingComponent = (comp: JSX.Element) => (
  <React.Suspense fallback={<>Loading</>}>
    {comp}
  </React.Suspense>
)

const routes = [
  {
    path: '/',
    element: <Navigate to='/home' />
  },
  {
    path: '/home',
    element: withLoadingComponent(<Home />)
  },
  {
    path: '/about',
    element: withLoadingComponent(<About />)
  },
  {
    path: '/user',
    element: withLoadingComponent(<User />)
  }
]

export default routes