在 Angular cli 中构建应用程序时出错

Question

PS E:\angular new> ng serve -o      
The serve command requires to be run in an Angular project, but a project definition could not be found.
PS E:\angular new> cd project-second
PS E:\angular new\project-second> ng serve -o      
? Port 4200 is already in use.
Would you like to use a different port? No
An unhandled exception occurred: Port 4200 is already in use. Use '--port' to specify a different port.
See "C:\Users\HP\AppData\Local\Temp\ng-ASaxs1\angular-errors.log" for further details.

Answer 1

你试过了吗：

PS E:\angular new\project-second> ng serve -o      
? Port 4200 is already in use.
Would you like to use a different port? Yes