Read e-book online Enterprise AJAX: Strategies for Building High Performance PDF

By David C. Johnson, Alexei White, Andre Charland

ISBN-10: 0132242060

ISBN-13: 9780132242066

Writing for company builders, architects, and person interface experts, the authors clarify why AJAX deals such nice promise in large-scale improvement. subsequent, they systematically introduce brand new key AJAX suggestions and elements. you are going to stroll via constructing frameworks for construction AJAX functions that mix info tables, internet kinds, charts, seek, and filtering: the very structures companies depend upon in CRM, ERP, BI, and past. Then, development in this powerful beginning, the authors determine confirmed AJAX architectural styles, and current case experiences drawn from real .NET and Java AJAX purposes. Coverge includes•Using AJAX to enforce Model-View-Controller (MVC) within the browser•Encapsulating consumer interface performance to facilitate code reuse and decrease cross-browser improvement problems•Overcoming the original safety demanding situations linked to AJAX internet applications•Optimizing AJAX usability: the "back" button, caching, bookmarking, offline utilization, and beyondFrom defense to scalability to venture probability, this can be the single e-book to hide the entire concerns dealing with AJAX builders within the firm. no matter if you are migrating legacy HTML interfaces or construction new functions from scratch, you will discover it completely integral.

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Extra resources for Enterprise AJAX: Strategies for Building High Performance Web Applications

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This miunderstanding has arisen from the fact that JavaScript differs from most object-oriented languages such as Java; object orientation in JavaScript is enabled by prototypes, whereas in Java, the use of classes is paramount. A second important difference is that JavaScript is a dynamic language, meaning that many things that occur at compile time in a static language such as Java, like the definition of classes, can occur at runtime in JavaScript. 1. prototype = new extends bar {} bar(); There are varying opinions on the subject of class versus prototypebased languages, and this primarily comes down to arguments about typesafety, efficiency, and more powerful object-oriented techniques such as interfaces and abstract classes.

This is counter-intuitive to most but arises from the fact that the scope of the outer function is dynamically appended to the scope of the inner function by the JavaScript interpreter. ” The implications of this might not be completely clear at the moment, but closures continually resurface as the solution to many problems in JavaScript. In fact, they have a key role in object-oriented JavaScript because they allow you to define functions that save the object scope or context until they are executed at a later time, even after the scope in which they were defined has been garbage collected.

When the response from the server is finally received by the web browser, the application can then ensure that no errors occurred on the server, and the user is not required to take any action—although, they might see some small change in the UI to indicate that the operation was successful. In the rare cases where an error occurs on the server, the user will be interrupted and notified of the error so that they can take action to correct it. These asynchronous requests to the server occur behind the scenes through JavaScript, which is equally important because it enables the application to fire and forget requests and removes the need for costly page refreshes.

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Enterprise AJAX: Strategies for Building High Performance Web Applications by David C. Johnson, Alexei White, Andre Charland

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