Information about storing information of my clients

Question

If I want to create a website how should I store my visitors login or sign up information. Could anyone Please tell me in detail?

Answer 1

If you want to store info in user device you can use

localstorage

#set
localstorage.set(key,value);

#get
Value = localstorage.get(key);

For online storage we need to study js and sql connecting tutorial(s)

Answer 2

If I complete js and sql completely can I do it on my own.

Answer 3

Check the link below if you completed js and sql

https://stackoverflow.com/questions/857670/how-to-connect-to-sql-server-database-from-javascript-in-the-browser