将新路径设置为c:\ users \你的名字\ appdata \漫游\npm\node_modules\@angular\cli\bin\ng现在对我来说很好

这个方法几乎适用于我，但我必须使用:%USERPROFILE%\AppData\Roaming\npm ． 在环境变量中…/ /系统变量的路径

然后当我执行CMD: "ng -v"时，我得到了angular cli的正确响应。

关闭CMD并再次以管理员权限打开或重新启动系统。

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".

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

执行以下几行，以解决ng未找到和未定义版本的问题

卸载-g angular-cli

卸载angular-cli

NPM缓存清理

安装-g @angular/cli@latest