دانلود کتاب JavaScript Promises Essentials

Build fully functional web applications using promises, the new standard in JavaScript
About This Book

Integrate JavaScript Promises into your application by mastering the key concepts of the Promises API
Replace complex nested callbacks in JavaScript with the more intuitive chained Promises
Acquire the knowledge needed to start working with JavaScript Promises immediately

Who This Book Is For
If you are a JavaScript developer working with asynchronous operations and want to know more about promises, then this book is ideal for you. Having a detailed explanation of JavaScript promises will be perfect as your next step towards adopting this new standard and using the API in your web and JavaScript applications.
What You Will Learn


Implement asynchronous programming in JavaScript


Get acquainted with the JavaScript Promises API


Choose the right JavaScript libraries to use callbacks in a non-compatible platform


Write chained asynchronous operations that are easy to manage


Master WinJS Promises for developing Windows applications


Differentiate between various implementations of promises in JavaScript


Put promises into action in your applications


Catch and handle errors effectively in asynchronous operations


Explore browser support and platform compatibility for JavaScript promises


In Detail
Promises are a new programming paradigm in JavaScript that allow developers to request data that they don't have yet and deal with it at a non-determined point in the future (asynchronously). Starting with the basics of the promise objects, we'll be able to leverage the maximum capabilities of promises when writing applications.
This book starts by giving you some background information on the asynchronous programming model in JavaScript, recognizing its importance in JavaScript programming. It then walks you through the key concepts and intricacies of the Promises API. Following that, you will learn how you can write complex asynchronous operations with chained promises and be able to catch and handle exceptions. With this book, you'll learn how to write better asynchronous operations using JavaScript promises.
**About the Author
Rami Sarieddine
Rami Sarieddine is a passionate technology evangelist and a subject matter expert in web development, Windows apps, and Microsoft Azure. He is currently working as a Technical Evangelist with Microsoft. This is his second publication, following his first book Developing Windows Store Apps with HTML5 and JavaScript, Packt Publishing (https://www.packtpub.com/application-development/developing-windowsstore-apps-html5-and-javascript#). He has more than 8 years of experience in programming for the Web. He was awarded the Microsoft Most Valuable Professional status twice, in 2012 and 2013, for his contributions to the technical communities of ASP.NET/IIS and Visual C#. He has featured as a regular speaker at key technical events for Microsoft Lebanon, including Open Door and TechDays. He has delivered hundreds of training sessions on HTML5, JavaScript, Azure, and Visual Studio. When not working, Rami enjoys running and spending time with his loved ones. And when on vacation, he enjoys traveling and visiting new places around the world. He can be reached via his e-mail ID, [email protected]. You can follow his tweets as well; his Twitter handle is @ramiesays. You can also find his blog posts on http://code4word.com.