Mastering JavaScript Promises Год: 2015 Автор: Muzzamil Hussain Издательство: Packt Publishing ISBN: 978-1-78398-550-0 Язык: Английский Формат: PDF/EPUB/MOBI Качество: Изначально компьютерное (eBook) Интерактивное оглавление: Да Количество страниц: 188 Описание: About This Book Look into Promises in-depth, learn how they are utilized in different modern web programming technologies, and gain the knowledge and confidence to apply them in your next venture Explore how different functions are applying Promises to achieve different goals A step-by-step guide to implementing Promises in different frameworks including Node.js, Angular.js, and jQuery Who This Book Is For This book is for all the software and web engineers wanting to apply the promises paradigm to their next project and get the best outcome from it. This book also acts as a reference for the engineers who are already using promises in their projects and want to improve their current knowledge to reach the next level. To get the most benefit from this book, you should know basic programming concepts, have a familiarity with JavaScript, and a good understanding of HTML. What You Will Learn Get a complete overview of the promises paradigm and its advantages Discover the programming models that are used to build JavaScript Execute the asynchronous programming model in JavaScript and understand its usefulness in modern web development Employ promises in JavaScript to boost your project performance Apply the best practices of promises in JavaScript to your platform of choice Manage your JavaScript code in a more professional and maintainable manner Utilize promises effectively and efficiently in different domains and disciplines of software engineering Implement promises in WinRT, Node.js, jQuery, and Angular.js In Detail JavaScript is a tool for the gurus who create highly useful applications, but it has some limitations. To overcome these limitations, a concept called JavaScript promises is rising rapidly in popularity. Promises makes writing complex logics more manageable and easy. This book starts with an introduction to JavaScript promises and how it has evolved over time. You will learn the JavaScript asynchronous model and how JavaScript handles asynchronous programming. Next, you will explore the promises paradigm and its advantages. Finally, this book will show you how to implement promises in platforms used in project development including WinRT, jQuery, and Node.js.
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Preface Chapter 1: Promises.js The fall and rise of JavaScript Google's contributions to JavaScript Where Promises.js came in? What is a promise? Why do we need promise in JS? Software prerequisites Future, promise, and delay States of a promise How do we keep Promises.js in this book? Browser compatibility Chapter 2: The JavaScript Asynchronous Model Programming models Learning the JavaScript asynchronous model The mechanism of a callback function in JavaScript The events The publisher/subscriber The promises object Summing up – the asynchronous programing model Chapter 3: The Promise Paradigm Callback, revisited Promise Deferred How do promise and deferred relate to each other? Standard behaviors of the Promise API Interactive promises The states and return values of a promise Common sequencing patterns Decoupling events and applications logic What promises prescribed not to do Promises and exceptions Best practices to handle exceptions in promise Considerations while choosing a promise Chapter 4: Implementing Promises How to implement promises Implementations in Java Say hello to JDeferred Mechanics of JDeferred Ultimate JDeferred Chapter 5: Promises in WinRT An introduction to WinRT The evolution of WinRT A little detail about WinJS WinJS – its purpose and a distribution history HTML5, CSS3, and JavaScript WT with HTML5, CSS3, and JavaScript The need for integrating promise with WT Problems when using asynchronous programming Jumpstarting promises Writing a function that returns a promise Error handling Chaining promises using the then() and done() functions Chapter 6: Promises in Node.js The V8 engine – the mechanics The V8 engine in Google Chrome The evolution of Node.js A brief introduction to Node.js Download and install Node.js Node Package Manager – NPM Choice of environment Setting up the environment for Node.js A simple node server Things we learned so far Node.js with the Q library Moving ahead with Q Propagation in Q Chaining and nesting promises Sequences in Q Combination in Q How to handle errors in Q in Node.js Making progress with promises Getting to the end of a chain of promises Callback-based promises versus Q-based promises Q.Promise() – another way to create promises Static methods of Q Promise as a proxy Familiarizing Node.js – the Q way Unbinds and its solution Q support for tracing stacks Making promise-based actions Object handling promises View revisited Aborting a promise Q utilities for Node.js Chapter 7: Promises in Angular.js The evolution of Angular.js The structure of the Angular.js document Getting started with Angular.js Creating your first Angular.js file How to use Angular.js on your local machine What would be your preference for the server? Key elements of Angular.js Implementing promises in Angular.js The schematics of using promises in Angular.js Promise as a handle for callback Blindly passing arguments and nested promises Deferred objects or composed promises Dealing with the nested calls Concurrency in Angular.js The combination of success and error The safe approach Route your promise Chapter 8: Promises in jQuery From where it started? Behind the scenes – how does jQuery work? Is your document ready to submit? How to use jQuery The syntax Caching in jQuery A sample example JavaScript before and after jQuery The solution – introducing promises in jQuery Deferred in jQuery $.Deferred().promise() in jQuery Projecting a promise in jQuery Joining promises with $.when Your own $.Deferred process The advent of promises in jQuery Chapter 9: JavaScript – The Future Is Now ECMAScript 6 (ECMA 262) harmony:generators The MEAN stack Real-time communication in JavaScript Internet of Things Computer animation and in 3D graphics NoSQL databases Index
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