My question is, I'm creating a react native application. I'm using mongoose, expressjs, nodejs, and mongodb. I am debating if to do the logic in front end or back end, where would it be ideal? I fell like back-end since it would be great in case I want to create a reactjs project in the future. What do you guys think? Example of what I want is display available times of the day where a user could purchase a service and each service has a time set. For example, if you purchase a service for a food and the time to create it takes 30 mins, then chef has that time unavailable.

CodePudding user response：

You must be aware that the frontend can always be manipulated by users. For example, properly pressing the "Order" button in your app may lead to a request

POST /Order?Food=IrishStew&Price=11

but a malicious can change that request to

POST /Order?Food=IrishStew&Price=1

and you would have to validate the price in the backend before accepting the order.

Summary: The frontend offers convenience for users, but every logic (for example, the price determination) that matters to the service company must be implemented in the backend.