To be more specific I m talking about how the Web works and I m referring to more in depth not only Client - Server relation but about all the stuff happening in there like headers, responses, CORS.
For example I checked nodemailer, a module for NodeJs for emails and in their documentation I ve found lots of stuff strange to me. I didn t know they existed and some of them seem to be useful for those who know they exist and what they do. For example: SMTP transport, Pooled SMTP, SMTP envelope, OAuth2. I ve read also about custom headers for emails.
It feels like there are way too many things and I feel overwhelmed. I don t know where to start really. I keep thinking these people who create modules for NodeJs they make things look so easy with their creation. I feel like I will never be to that point where I will contribute to a module/library…
Can anyone recommend me some tutorials or something that explain properly/more in detail about web, more options that exist and what they do? And also about emails since they re part of the web development as well.