When to use the client or server side?

Question

I just finished an introduction to a web developer course in my CS program and walked away wondering something simple. When should you use JavaScript (client-side) instead of server-side (we used PHP, but something is applicable)? And vice versa.

Answer 1

There is no recipe for making a decision. A few notes:

• security and validation should always be present on the server side (sometimes duplicated on the client).
• the client side should contain only UI logic. No business logic.
• logically, everything that accesses the database must be on the server.

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Answer 2

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Answer 3

Imho, I would say use the server side if you can. All client code can be manipulated. Or, it may not work, because the browser does not support it.