By Frank Zammetti
Practical JavaScript, DOM, and Ajax Projects is perfect for net builders already skilled in JavaScript who are looking to take their wisdom to the following point. It provides 10 entire instance tasks that you should research from and adapt to be used on your personal work.
The ebook begins with a brief recap of the basics of contemporary JavaScript improvement earlier than relocating correct alongside to the functions. for every program, you're taken in the course of the making plans, layout, and implementation levels. Theres anything for everybody herea software library, a validation framework, a GUI widget framework, a dynamic occasion calendar program, a drag-and-drop procuring cart, and more!
Over the process the ebook, writer Frank Zammetti covers JavaScript top practices, Ajax innovations, and a few of the preferred JavaScript libraries, akin to Prototype, Script.aculo.us, and the Yahoo YUI. one of many major premises of this ebook is that will help you examine by way of instance so that you can then observe your wisdom on your personal initiatives. This booklet will prevent numerous hours of improvement time and aid additional your JavaScript knowledge!
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Additional resources for Practical JavaScript™, DOM Scripting, and Ajax Projects
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JavaScript: reach divinity in the eyes of your users by doing it right! 29 30 CHAPTER 2 ■ THE SEVEN HABITS OF HIGHLY SUCCESSFUL JAVASCRIPT DEVELOPERS More on Object-Oriented JavaScript When many JavaScript programmers start out, they often do not even realize that the language offers some object orientation. 1 There is more than one way to skin a cat, and likewise, there is more than one way to create objects in JavaScript. Simple Object Creation Perhaps the easiest way to create an object is to start with a new Object, and then add to it.
The code is also a bit more easily extensible with that approach. This is a relatively minor point, but it is an element of style that has only in the past few years come into the minds of JavaScript developers. Early on, you would rarely have seen the approach used in Person2. You would have instead seen function calls with oodles of arguments. But if you asked C++ developers how they would have coded this, you almost certainly would hear an answer involving some sort of collection, maybe a value object being passed in, or something along those lines.
Each copy of newClass having its own copy of firstName is probably what you want, but wouldn’t it be great if all instances could share the same copy of sayName(), thereby saving memory? Clearly, in this instance, we’re not talking about a big deal in terms of memory, but you can easily imagine a more substantial piece of code where it would make a much bigger difference. Fortunately, there is a way to do that. Prototypes Every single object in JavaScript has a prototype property associated with it.