HTML, CSS and JavaScript - Oh My!

The presentation layer is one of the three main layers in object-oriented programming.

The three main layers include:

• Presentation Layer
• Business Layer
• Data Layer

Now, these three layers are typically related to enterprise web applications. It's a design pattern used to help separate your code out in three distinct areas that (if need be) can easily be switched out with another programming language or technology.

So if you keep all of your presentation layer code in one area of your application, switching presentation layer technologies shouldn't be too difficult.

Same rules apply to the business and data layers. If you separated your code out properly, switching databases shouldn't be too big of an issue.

Having said that, we'll be focusing on the presentation layer.

The four big players (in terms of technology) in the presentation layer are as follows:

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