194 CHAPTER 6 DECOUPLED NAVIGATION PATTERN E (Net web server)
194 CHAPTER 6 DECOUPLED NAVIGATION PATTERN E B V N Figure 6-20. Pop-up box HTML component details Pattern Highlights Based on its description in the Architecture section, the Decoupled Navigation pattern might seem unnecessary. However, the usefulness of this pattern became obvious in the Implementation section. With Ajax, complex web applications are going to be written that navigate very sophisticated data. Navigating the content means using some type of link, and logic on the client side, and that is the heart of the Decoupled Navigation pattern in that it aims to organize and decouple the various pieces of the logic. All of this was illustrated by an example that became progressively more complex. The essence of this pattern is to focus on the client side and to break apart the pieces of an HTML application so that maintenance, extensibility, and coding are simpler and can be overseen. The fact is that many HTML applications are complicated, and maintaining oversight of these applications is imperative. For each of the functionalities, there are some rules of thumb. For the Action functionality, the following rules are defined: Use the id property to uniquely identify all HTML elements that will be used in the application. The HTML event object instance should be abstracted for simplicity and robustness.
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