打开cmd，输入npm install -g @angular/cli 在环境变量中，在用户变量或系统变量中添加“Path”value=C:\Users\your-user\.npm-packages\node_modules\.bin 打开cmd: c:\>cd your-new-project-path .．.\project-path\> ng new my-app 或者ng all-ng-commands

打开cmd，输入npm install -g @angular/cli 在环境变量中，在用户变量或系统变量中添加“Path”value=C:\Users\your-user\.npm-packages\node_modules\.bin 打开cmd: c:\>cd your-new-project-path .．.\project-path\> ng new my-app 或者ng all-ng-commands

I was having the same issue when tried with the syntax "ng new " and solved that simply by updating the existing node version from 5.x.x to 8.x.x. After successful updation of node, the syntax worked perfectly for me. Please update the existing version of node. As it is clearly mentioned in angular documentation that these commands require the node version >= 6.9.x. For reference please check https://angular.io/guide/quickstart. It clearly states "Verify that you are running at least node 6.9.x and npm 3.x.x by running node -v and npm -v in a terminal/console window. Older versions produce errors, but newer versions are fine".

您可以这样办理登机手续。我也有同样的问题。首先，在环境变量中检查用户PATH。它必须指向%USERPROFILE%\AppData\Roaming\npm\node_modules\@angular\cli\

使用node.js命令提示符代替命令提示符。在安装的程序菜单中运行node.js命令提示符。点击开始，搜索node.js命令提示符。运行它，然后输入ng -v回车。它会起作用的。如果有帮助，请告诉我。

关闭CMD并再次以管理员权限打开或重新启动系统。

我也遵循这个问题，所以我尝试了这个命令，它工作得很好。 使用命令:npm run ng