尝试使用%AppData%\npm\设置系统变量路径。确保AppData文件夹的可见性。这个文件夹应该是可见的(而不是隐藏的)。

将C:\Users\DELL\AppData\Roaming\npm添加到系统变量路径对我来说很有效。请找到相应的“npm”文件路径

另外，检查是否已经将angular-cli\bin路径添加到path变量中。

通过命令

npm install -g @angular/cli@latest

它工作得很好，我现在能够运行ng命令了。

只需打开命令提示符(以管理员身份运行)。确保node——v高于6.9.0,npm——v高于3.0.0 r。

然后执行以下命令:

npm install -g @angular/cli

一旦安装了angular。你可以在路径中看到angular cli的条目

C:\Users\Dell\AppData\Roaming\npm\node_modules\@angular

那就试着帮忙。它会起作用的。

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".

在系统env设置中，将node_modules下的.bin文件夹中的ng命令路径添加到path变量。

例:将C:\testProject\node_modules\.bin\添加到PATH中

重新启动IDE。