Question

I am a developer for sometime now, and for the past few years I am using prototype framework and it’s implementation for OOP, to be used in Javascript. I’ve used jquery and some other frameworks as well.

I ‘ve been studying how js works and how differs from OOP, as it is a prototype oriented language. In my opinion is in fact a great concept, the prototype oriented language.

Given the right attention to:

– it was how the language was meant to be used, and so therefore is faster, more productive and theoretically, simpler and smoother.
– Every browser has its own implementation for how javascript is supposed to work, making sometimes impossible for having a concise code work in all browsers, or at least the majority.
– Usually those OOP frameworks (dojo.declare(), Js.Class, MooTools, etc) are more than suitable to make a nice work, and they are cross-browsers.

I can’t help but wonder, is it worth to start making RIA’s using javascript prototype oriented? Or Should I go for Dojo.declare(), js.class or some similar?

Answer 1

I don’t think you must forfeit OOP when you program in JS; I suggest you embrace OOP!

• I prefer the ExtJS library which provides classes, encourages subclassing, and provides a very nice example of a well-defined class hierarchy.
• Douglas Crockford provides examples of making member data and member functions private (no protected).
• Many people use JavaScript’s prototype as a vehicle to implement inheritence; again see Douglas Crockford.
• Polymorphism is easy as JS is not strongly typed.

Also, many of the popular JavaScript libraries abstract browser differences from the developer; you will likely find few “ifs” in your code to compensate for differences in browsers should you choose to use a JS library.

Finally, here are some other good resources from SO.