The lines between mobile devices and desktops are starting to blur, so there's never been a better time to turbocharge your mobile and app development skills. If you have even basic HTML, CSS, and ...

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。