Nevertheless, setting up a web server can be advantageous for some types of applications. For instance, if you are developing a web application that needs to communicate with a database or other back-end services, you will need a web server. A web server can also aid with performance, security, and scalability.
If you are constructing an application that requires data from an API or other external source, you will need to use a web server to proxy requests to the external source. This will allow you to make requests to the external source without the users of your application having to worry about cross-domain issues.
Another motive to use a web server is to enable caching. Caching can help improve the performance of your application by storing frequently used data. This will reduce the number of requests to the server and improve the user experience.
Finally, a web server can help with scalability. If your application is receiving more traffic than it can handle, a web server can help by balancing the load across multiple servers. This will allow your application to keep running smoothly, even when the load increases.
In conclusion, while it is not obligatory to use a web server to run an AngularJS application, there are some cases where it is sensible. If you are developing an application that needs data from an external source or needs to scale to handle more traffic, then a web server can be beneficial. So if you are creating an AngularJS application, consider whether a web server is necessary.