加上Fragment后出现Fragment没有定义的报错
来源:2-2 Header组件拆分及样式布局(2)
慕侠3297407
2022-06-13 08:30:37
C:\Users\18660\Desktop\my-app>npm start npm WARN config global `--global`, `--local` are deprecated. Use `--location=global` instead. > my-app@0.1.0 start > react-scripts start (node:54096) [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:54096) [DEP_WEBPACK_DEV_SERVER_ON_BEFORE_SETUP_MIDDLEWARE] DeprecationWarning: 'onBeforeSetupMiddleware' option is deprecated. Please use the 'setupMiddlewares' option. Starting the development server... Failed to compile. Should not import the named export 'version' (imported as 'version') from default-exporting module (only default export is available soon) WARNING in ./node_modules/mutationobserver-shim/dist/mutationobserver.min.js Module Warning (from ./node_modules/source-map-loader/dist/cjs.js): Failed to parse source map from 'C:\Users\18660\Desktop\my-app\node_modules\mutationobserver-shim\dist\MutationObserver.js' file: Error: ENOENT: no such file or directory, open 'C:\Users\18660\Desktop\my-app\node_modules\mutationobserver-shim\dist\MutationObserver.js' WARNING in ./node_modules/antd/dist/antd.css (./node_modules/css-loader/dist/cjs.js??ruleSet[1].rules[1].oneOf[5].use[1]!./node_modules/postcss-loader/dist/cjs.js??ruleSet[1].rules[1].oneOf[5].use[2]!./node_modules/source-map-loader/dist/cjs.js!./node_modules/antd/dist/antd.css) Module Warning (from ./node_modules/postcss-loader/dist/cjs.js): Warning (168:11) autoprefixer: Replace text-decoration-skip: ink to text-decoration-skip-ink: auto, because spec had been changed WARNING in ./node_modules/antd/dist/antd.css (./node_modules/css-loader/dist/cjs.js??ruleSet[1].rules[1].oneOf[5].use[1]!./node_modules/postcss-loader/dist/cjs.js??ruleSet[1].rules[1].oneOf[5].use[2]!./node_modules/source-map-loader/dist/cjs.js!./node_modules/antd/dist/antd.css) Module Warning (from ./node_modules/source-map-loader/dist/cjs.js): Failed to parse source map: 'webpack:///./<no source>' URL is not supported WARNING in ./node_modules/antd/dist/antd.css (./node_modules/css-loader/dist/cjs.js??ruleSet[1].rules[1].oneOf[5].use[1]!./node_modules/postcss-loader/dist/cjs.js??ruleSet[1].rules[1].oneOf[5].use[2]!./node_modules/source-map-loader/dist/cjs.js!./node_modules/antd/dist/antd.css) Module Warning (from ./node_modules/source-map-loader/dist/cjs.js): Failed to parse source map: 'webpack:///./components/icon/style/index.less' URL is not supported WARNING in ./node_modules/antd/dist/antd.css (./node_modules/css-loader/dist/cjs.js??ruleSet[1].rules[1].oneOf[5].use[1]!./node_modules/postcss-loader/dist/cjs.js??ruleSet[1].rules[1].oneOf[5].use[2]!./node_modules/source-map-loader/dist/cjs.js!./node_modules/antd/dist/antd.css) Module Warning (from ./node_modules/source-map-loader/dist/cjs.js): Failed to parse source map: 'webpack:///./components/locale-provider/style/index.less' URL is not supported WARNING in src\components\Header\index.js Line 10:5: img elements must have an alt prop, either with meaningful text, or an empty string for decorative images jsx-a11y/alt-text ERROR in ./node_modules/antd/es/version/index.js 2:15-22 Should not import the named export 'version' (imported as 'version') from default-exporting module (only default export is available soon) ERROR in src\components\Header\index.js Line 9:5: 'Fragment' is not defined react/jsx-no-undef Search for the keywords to learn more about each error. webpack compiled with 2 errors and 6 warnings
import React,{Component} from 'react'; import {Menu,Icon} from 'antd'; import logo from './logo.png'; import './style.css'; class AppHeader extends Component{ render(){ return ( <Fragment> <img src={logo} className='app-header-logo'/> <Menu mode="horizontal"> <Menu.Item key="mail"> <Icon type="mail" />VOA慢速英语 </Menu.Item> </Menu> </Fragment> ) } } export default AppHeader;
2回答
好帮手慕慕子
2022-06-13
同学你好,自己能够发现并解决问题,真棒!!!可以学着根据报错信息来解决问题,慢慢培养自己独立解决问题的能力,祝学习愉快~
慕侠3297407
提问者
2022-06-13
奥知道了,没引入
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