当我在我的终端上输入create-react-app my-app命令时，它似乎工作了-下载所有库成功等。在该过程结束时，我得到一个消息，没有提供模板。
输入
user@users-MacBook-Pro-2 Desktop% create-react-app my-app
输出
Creating a new React app in /Users/user/Desktop/my-app.
Installing packages. This might take a couple of minutes.
Installing react, react-dom, and react-scripts...
..... nothing out of the ordinary here .....
✨ Done in 27.28s.
A template was not provided. This is likely because you're using an outdated version of create-react-app.
Please note that global installs of create-react-app are no longer supported.
在包中。my-app的Json:
"dependencies": {
"react": "^16.12.0",
"react-dom": "^16.12.0",
"react-scripts": "3.3.0" <-- up-to-date
}
我检查了CRA更改日志，它看起来像是增加了对自定义模板的支持-但是它看起来不像命令create-react-app my-app会改变。
知道这是怎么回事吗?
先清空你的npm缓存，然后使用yarn，如下所示:
NPM缓存清理——force
NPM缓存验证
Yarn创建my-app
我希望这能有所帮助。
EDIT
.．.在我进一步研究了这个问题之后，你可能想尝试以下方法:
NPM卸载-g create-react-app
Yarn全局删除create-react-app
which create-react-app -如果它返回一些东西(例如/usr/local/bin/create-react-app)，然后执行rm -rf /usr/local/bin/create-react-app手动删除。
NPM缓存清理——force
NPM缓存验证
npx create-react-app@latest
These steps should remove globally installed create-react-app installs, you then manually remove the old directories linked to the old globally installed create-react-app scripts. It's then a good idea to clear your npm cache to ensure your not using any old cached versions of create-react-app. Lastly create a new reactjs app with the @latest option like so: npx create-react-app@latest. There has been much confusion on this issue where no template is created when using npx create-react-app, if you follow the steps I have stated above (1-6) then I hope you'll have success.
p.s.
如果我想在一个叫client的目录中创建一个react应用程序，那么我会在终端中输入以下命令:
NPX create-react-app@latest ./client
祝你好运。
出现此问题是因为不再支持create-react-app的全局安装。为了解决这个问题，你应该从你的系统中卸载并完全删除create-react-app，所以分别运行这些命令:
npm uninstall -g create-react-app
or
yarn global remove create-react-app
然后用这个命令检查create-react-app是否存在
which create-react-app
如果它返回任何正确的路径，比如
/c/Users/Dell/AppData/Local/Yarn/bin/create-react-app
然后执行该命令全局删除create-react-app
rm -rf /c/Users/Dell/AppData/Local/Yarn/bin/create-react-app
现在你可以用下面的命令创建一个新的react应用程序:
npx create-react-app my-app
npm init react-app my-app
yarn create react-app my-app
