在开发模式下运行应用程序。 打开在浏览器中查看它。 如果您进行编辑，则页面将重新加载。 您还将在控制台中看到任何棉绒错误。 yarn test 在交互式监视模式下启动测试运行器。 有关更多信息，请参见关于的部分。 yarn build 构建生产到应用程序build文件夹。

Despite many worthy contenders, React remains the most popular front-end framework, and a key player in the JavaScript development landscape. React is the quintessential reactive engine, continually ...

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From there, inside the hello-world folder that gets created, run a single npm start command to start your app and make it available on port 3000 of localhost: This React Hello World tutorial ...

There are very good reasons for Java’s long-lived popularity as a server-side platform. It combines unbeatable maturity and breadth with a long and ongoing history of innovation. Using Spring adds a ...