I'm looking to make a web based card game for people to play with their friends in person (ie substituting playing cards with phones/tablets)
I know this can be done through having an account-based website, but I'm trying to avoid going down that route for now.
Basically what I need (if it's possible) is a way to send data to and from devices on the same wifi when on a particular web page, but various Google searches have not resulted in me getting any idea of where to start. Obviously this is potentially a big task, so all I really need for now is a rough idea of the area of Web development code-wise to research and learn.
What would you suggest be the best place to start?