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Pro JavaScript Techniques [Anglais] [Broché]

John Resig

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Pro JavaScript Techniques is the ultimate JavaScript book for the modern web developer. It provides everything you need to know about modern JavaScript, and shows what JavaScript can do for your web sites. This book doesn't waste any time looking at things you already know, like basic syntax and structures. Expert web developer and author John Resig concentrates on fundamental, vital topics--what modern JavaScripting is (and isnt), the current state of browser support, and pitfalls to be wary of. The book is organized into four sections: * Modern JavaScript development using JavaScript the object-oriented way, creating reusable code, plus testing and debugging * DOM scripting updating content and styles, plus events, and effect and event libraries * How Ajax works, overcoming problems, and using libraries to speed up development of Ajax applications * The future of JavaScript looking at cutting edge topics like JSON, HTML5, and more All concepts are backed up by real-world examples and case studies, and John provides numerous reusable functions and classes to save you time in your development. There are also up-to-date reference appendixes for the DOM, events, browser support (including IE7), and frameworks, so you can look up specific details quickly and easily.

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Couverture | Copyright | Table des matières | Extrait | Index | Quatrième de couverture
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Commentaires client les plus utiles sur (beta) 4.1 étoiles sur 5  34 commentaires
68 internautes sur 70 ont trouvé ce commentaire utile 
5.0 étoiles sur 5 A great book -- but not for all. 19 mars 2007
Par Brett Merkey - Publié sur

"Pro JavaScript Techniques" is definitely for experienced and advanced scripters. The level of abstraction is high in this treatment of the latest trends of JavaScript. If you are looking for ready-made scripts to solve some specific problem in your site or application, you are looking for a different sort of book.

If you have ever gone to Douglas Crockford's site to learn about advanced concepts in JavaScript, and withdrew dazed and abused by his obtuse examples -- but with a conviction that there was something valuable to learn there -- this book is for you.

The author states, and I agree, that understanding Chapter 2, "Object Oriented JavaScript" is the key to the puzzle. "The phrase object-oriented JavaScript is somewhat redundant, as the JavaScript language is completely object-oriented and is impossible to use otherwise. However, a common shortcoming of most new programmers is to write their code functionally without any context or grouping."

The chapter contains a clear exposition of what the author means by "context or grouping." In fact, his concise but relevant example code to explain the distinction between privileged methods and static methods lit up all sorts of light bulbs in my head...Finally! :-)

Be aware that the author's approach has a particular bias in that it is often directed at the *programmer* coming into Web scripting. The idea is to make the JavaScripting world appear more like the programming languages already known. You learn "how to go about writing a variety of object-oriented code to suit anyone coming from another programming language."

This is a great book -- but not for all.

33 internautes sur 33 ont trouvé ce commentaire utile 
5.0 étoiles sur 5 excellent for the at least moderately experienced 28 janvier 2007
Par Felix Sheng - Publié sur
As a javascript dabbler, I was looking for a book aimed at someone already familiar with javascript and found this one. Having read a few apress books, I felt pretty confident that the quality of this one would be at least reasonable and I definitely wasn't let down.

The executive overview is that this is an excellent book for those who are already working in javascript and are looking to improve their game. It covers a world of techniques very well. Highly recommended.

Now, the longer review...

This is an excellent book that deftly avoids the pitfalls so many books that claim to be aimed at people familiar with the topic. So many of these types of books try to be accessible they end up giving a lot of basic information mixed in with the advanced information - ultimately becoming a text unsatisfying for people of any level. This book devotes the beginning 15% of pages going over the basics, but it covers a ton of ground by acting more as a refresher course - assuming at least basic familiarity with most of the topics. I think it really did a great job of this, starting in Chapter 1 with a broad overview of OO javascript, cross browser issues, being serious and rigorous with your development process and their particular views on how to deploy javascript unobtrusively.

The subsequent 3 chapters are the refresher course. These chapters work through a ton of topics, at times it refers you to sites on the net for further information. He starts the overview with pretty much every topic in OO development, from scope and closures to a remarkably sweet and concise description of context. He brings together all these topics and how together they form the building blocks for javascripts particular flavor of OO. Then he tackles the various ways to deal with inheritance - here he covers ways to do it yourself as well as a couple libraries that you can use. He also talks about packaging and ways to make your code play well with others. He wraps up the overview with a chapter about debugging and testing - a topic I think a bit under-discuessed in javascript and I was happy to get his views and suggestions on how to deal with these.

With those conveniently out of the way he dives right into several chapters where he talks about the DOM, events and css scripting and how they relate to his goal of creating unobtrusive scripts where no javascript intrudes on nice clean html. He covers these topics by presenting a small problem and working through the code to solve that problem. It's very easy to follow and works well. He introduces several libraries to help with the process, but is careful always to explain the fundamentals of how things are actually working under the hood. Too many books that start working with libraries gloss over what's actually happening and wind up being little more than extra documentation for the libraries, fortunately this book doesn't suffer from this problem.

He then goes into two more chapters bringing it all together with larger in depth projects, enhancing forms with validation and other features as well as a javascript image gallery.

The last major part covers Ajax - one chapter goes into nice detail and builds several helpful library functions. He also covers handling the return of these requests and the pros/cons of xml vs html vs json. And then it goes into two bigger projects enhanced blogs, autocomplete and wiki.

Finally, he talks a little about where javascripts going and provides some references for DOM, events and browsers in the appendix.

There's not much negative to say about this. It gives a great overview for those who don't know the language inside and out, it covers a huge number of topics in a very readable and instructive way and gives a very useful reference to DOM and event scripting at the end. It does suffer slightly from putting some code in that is unexplained until a future point in the book. But, it doesn't happen often.
24 internautes sur 25 ont trouvé ce commentaire utile 
5.0 étoiles sur 5 Be a Pro JavaScripter in no time!!! 28 mai 2007
Par Frank Stepanski - Publié sur
In the days of Ajax, a good understanding of JavaScript is crucial in really understanding how Ajax works. This book by John Resig (developer of JQuery) has written an intermediate - advanced book on JavaScript teaching the reader topics such as object-oriented practices, creating reusable code, DOM, events along with many useable examples. With all the fancy JavaScript libraries out now, it is good to have a book that teaches the reader how to create your own libraries or at least how many of those are create with proper object-based development.

Until Ajax came along (which brought about JS libraries), knowing how to create objects and reusable code wasn't really explained much in books. This book talks about it in the first chapter, where John shows how to create objects via Prototyping, function overloading and using the Object constructor. John also talks about closures, scope, property and method creation and namespacing. All of these topics are found in other languages (C++, Java, VB.NET), but were not really used much in JavaScript until recently. John also covers in detail inheritance (classical and prototypal) and goes through other libraries (YUI, Dojo, Prototype, etc) and how they are created. A very thorough explanation on objects and creating reusable code in JavaScript. Actually this is one of the few books that have covered these topics in such detail. Many other books just skimmed the surface with these topics that made it hard for the newbie to understand.

What current JavaScript book could be published without talking about the DOM. Every book nowadays talks about this topic since everything out on the web seems to use it in on form or another. This book goes in to great detail talking about the DOM with a complete explanation of the basics of what it is, when it can be accessed (waiting for the DOM to load), finding elements on a page, standard DOM methods and 3rd party functions that have been used for years to fill in the gaps of DOM methods that are not available. For instance: addEvent, getElementsByClassName, CSSQuery, JQuery and others. Without a solid foundation of the DOM, many of the cool things that are done on the web today could not be done.

Another important and often not talked about topic is event registration. Chapter 6 of this book goes into the various ways and element can respond to an event. From event phases, (capturing and bubbling), traditional event binding (DOM Level 1) to W3C DOM Binding. This can be a very difficult topic to understand since there are a few differences between the way IE and other browsers handle it. But John explains each difference in great detail and makes you fully aware of how to handle it with some nice examples.

John also covers creating unobtrusive scripts which doesn't assume that JavaScript will be available in the user's browser and how to handle this scenario. This also ties in to separating the three layers (Presentation, Structure and Behavior) which is also discussed. This teaches the user how to keep your inline JS event handling out of the HTML and in a separate .JS file. This makes updating your code easier and less problematic in the future.

The rest of the book focuses on using JavaScript with CSS and applying the previous techniques covered in useful examples such as form validation, creating a dynamic image gallery and some simple Ajax examples.

This is a great book if you know the basics of JavaScript and want to take your skills to the next level and especially if you're not a "true" programming and need a little more explanation. A great book!
12 internautes sur 12 ont trouvé ce commentaire utile 
2.0 étoiles sur 5 If you can debug the code, you don't need the book 25 août 2008
Par Martin Glynn - Publié sur
Format:Broché|Achat vérifié
I agree with only one other reviewer who commented on the typos, etc. The demo code does not work until you debug it. The first couple of chapters on Javascript code are very good. The chapters on Forms (8) and Lightbox(9) are so poor I stopped reading. I am a jQuery user and admire Resig's contribution, but this book should be skipped.
10 internautes sur 10 ont trouvé ce commentaire utile 
5.0 étoiles sur 5 Must-Read for Professionals 5 avril 2007
Par Nathan Smith - Publié sur
I an avid user of the concise JavaScript library jQuery. Though I am not a Star Trek fan at all, I like to think of jQuery as a universal translator of sorts. As long as I can intelligibly express in logical JavaScript syntax what I want to happen, jQuery does the heavy lifting, making it work in multiple browsers on differing operating systems, and it is all done unobtrusively. Needless to say, when I heard of the jQuery author writing a book, I was eager to read it.

I have just finished Pro JavaScript Techniques, penned by John Resig and tech-reviewed by Dan Webb. Let me just say that this book does not disappoint. This book takes a straightforward approach, and presupposes a fair amount of familiarity with JavaScript. It does not re-hash the history of the language as with many beginner books, and instead gets right into the fray. It picks up where its Apress predecessor Beginning JavaScript left off.

I appreciated that while this book could have easily been used as a selfish proclamational platform for jQuery, Resig took the high road and presented in-depth examples of writing complex DOM scripting. He also touches on other popular JS frameworks: Dojo, Moo.fx, and Prototype.

He also gets into the principles behind writing object-oriented code and optimizing it for reusability and avoiding of namespace collisions, when working alongside other developers. He then covers how to make the best use of Ajax, and the implications behind accessibility and need for a fall-back plan.

One of the serendipitous moments for me was seeing the name of a former coworker, Godbit contributor Cody Lindley. He was mentioned for his work on ThickBox, an in-browser modal window popup which can be used for image galleries and Ajax content. It runs atop the jQuery library, and I had the privilege of making the animated loading icon for it.

As the book's byline touts, this is a book full of real-world scenarios. As such, there are several code-complete examples: basic animations, form validation, infinitely scrolling WordPress blog archive, image gallery, auto-complete search, and an Ajax wiki. The last section covers what's on the JavaScript horizon: version 1.6, 1.7, Web Applications 1.0 recommendation, and the canvas tag.

There are also three appendices which are well worth reading, a DOM reference, Events reference and modern browser overview. When it's all said and done, this book is one that no scripting pro should be without. I am already eagerly awaiting Resig's next printed endeavor, the definitive jQuery Book.
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