课件及源代码地址

使用VS Code编辑器的同学们，我推荐一个插件。在VS Code插件库中搜索“TypeScript Auto Compiler”，安装上这个插件，然后在项目工程里tsc --init之后，生成了tsconfig.json文件。之后每次保存ts文件就会自动生成对应的js文件。超级方便的~

webpack.config.js 中的配置是错误的, 应该是`process.env.NODE_ENV`, 且需要将导出作为函数给webpack调用才能获取正确的传入值

webpack四个配置文件在源码中没找到额。。

TS 最后运行会转为 JS 去运行，视屏中说的强类型语言运行时的优势就不存在了吧？

cheap-module-eval-source-map 这个npm中找不到呢，可以用什么替代？

我按照老师的教程在package.json中配置工程，最后在npm start的时候，失败了，项目没有跑起来，这应该怎么办呢？ code: 'MODULE_NOT_FOUND', requireStack: [ '/Users/chenlili/Downloads/practice/TypeScript/node_modules/webpack-dev-server/bin/webpack-dev-server.js' ] } npm ERR! code ELIFECYCLE npm ERR! errno 1 npm ERR! TypeScript@1.0.0 start: `webpack-dev-server --mode=development --config ./build/webpack.config.js` npm ERR! Exit status 1 npm ERR! npm ERR! Failed at the TypeScript@1.0.0 start script. npm ERR! This is probably not a problem with npm. There is likely additional logging output above. npm ERR! A complete log of this run can be found in: npm ERR! /Users/chenlili/.npm/_logs/2020-06-08T07_32_02_576Z-debug.log

ERROR in ./src/index.ts 1:9 Module parse failed: Unexpected token (1:9) You may need an appropriate loader to handle this file type, currently no loaders are configured to process this file. See https://webpack.js.org/concepts#loaders > let hello:string="Hello TypeScript"; | document.querySelectorAll('.app')[0].innerHTML=hello; 我这个错误是为什么，loader我应该是安装了

npm run build 报错，是webpack现版本不允许这样配置了吗 Invalid configuration object. Webpack has been initialised using a configuration object that does not match the API schema. - configuration has an unknown property 'plugin'. These properties are valid: object { amd?, bail?, cache?, context?, dependencies?, devServer?, devtool?, entry?, externals?, infrastructureLogging?, loader?, mode?, module?, name?, node?, optimization?, output?, parallelism?, performance?, plugins?, profile?, recordsInputPath?, recordsOutputPath?, recordsPath?, resolve?, resolveLoader?, serve?, stats?, target?, watch?, watchOptions? } For typos: please correct them. For loader options: webpack >= v2.0.0 no longer allows custom properties in configuration. Loaders should be updated to allow passing options via loader options in module.rules. Until loaders are updated one can use the LoaderOptionsPlugin to pass these options to the loader: plugins: [ new webpack.LoaderOptionsPlugin({ // test: /\.xxx$/, // may apply this only for some modules options: { plugin: … } }) ]

想问一下，老师用的vscode有预装视频展示之外的插件吗，我平常工作时候用的webstorm比较多，不知道可不可以直接搬到上面用，会有影响吗

老师，这里的div为什么使用class而不是用id呢？id不是更好一些吗？