First, after installing angular with npm
npm install generator-angular
Then use yeoman to generate the angular project
yo angular angularapp
The problem shown in the picture will appear
Then check the file generation directory and everything else is there, but there is no node_moduels dependency package folder.
Okay, I understand. You need to execute Npm install and bower install to download dependency packages.
But it still cannot be used when using grunt serve. Then the next lower version of generator-angular (0.10.0) will be enough.
Execute bower install & npm install again in the project directory
If you confirm that everything else is normal, and then this problem still occurs. You can check the network. One is connected or not. 2. Whether you can easily access the website you want to access. (In many cases, foreign websites cannot be accessed in China. You know!)