我试着创建一个新的react应用程序
npx create-react-app myapp
cd myapp
npm start我使用的是react版本18.2.0
{
"name": "myapp",
"version": "0.1.0",
"private": true,
"dependencies": {
"@testing-library/jest-dom": "^5.16.4",
"@testing-library/react": "^13.3.0",
"@testing-library/user-event": "^13.5.0",
"react": "^18.2.0",
"react-dom": "^18.2.0",
"react-scripts": "5.0.1",
"web-vitals": "^2.1.4"
},然后我得到了一个错误，我的应用程序也没有在浏览器中打开。（我尝试手动打开localhost，但没有运气）
(node:8168) [DEP_WEBPACK_DEV_SERVER_ON_AFTER_SETUP_MIDDLEWARE] DeprecationWarning: 'onAfterSetupMiddleware' option is deprecated. Please use the 'setupMiddlewares' option.
(Use `node --trace-deprecation ...` to show where the warning was created)
(node:8168) [DEP_WEBPACK_DEV_SERVER_ON_BEFORE_SETUP_MIDDLEWARE] DeprecationWarning: 'onBeforeSetupMiddleware' option is deprecated. Please use the 'setupMiddlewares' option.
1条答案
按热度按时间zpgglvta1#
尝试更改
webpackDevServer.config.js中的名称，它对我很有效。1.打开node_modules文件夹。
2.搜索webpackDevServer.config.js文件夹。
3.打开js文件并编辑它。