Learning jQuery Deferreds by Jones, Terry -- Read -- Imperial Library of Trantor

Index

Learning jQuery Deferreds Preface

About You Our Aims Challenges jQuery Deferreds Our JavaScript Coding Style, or Lack Thereof Conventions Used in This Book Using Code Examples Safari® Books Online How to Contact Us Acknowledgments

1. Introduction

Food for Thought Terminology: Deferreds and Promises Familiar Promises

2. The jQuery Deferred API

Consuming Promises

More Terminology: Resolve, Reject and Progress done fail always progress promise then state when

Creating Deferreds

Construction resolve and resolveWith reject and rejectWith notify and notifyWith

Putting It All Together Deferred Dynamics Deprecated Promise Methods

isRejected and isResolved pipe

Changes in the jQuery Deferred API

3. Deferred Recipes

A Replacement for the setTimeout Function

Challenges

Messaging in Chrome Extensions

Challenges

Accessing Chrome Local Storage

Challenges

Running Promise-Returning Functions One by One

Challenges

A Promise Pool with an emptyPromise Method

Creating a Promise Pool Using the Promise Pool Challenges

Displaying Google Maps

Challenges

Communicating with a Web Worker

The Web Worker Code Creating a Web Worker Using It Summary Challenges

Using Web Sockets

The Web Socket Server The Web Socket Client Challenges

Automatically Retrying Failing Deferred Calls

Challenges

Memoization

Discussion Avoiding the Dogpile Effect Challenges

Short-Term Memoization of In-Progress Function Calls

createUser Is Not Idempotent Challenges

Streaming Promise Events

Delivering More Information Delegating the Event Stream To Be Continued… Challenges

Getting the First Result from a Set of Promises

Which Promise Fired? A Fly in the Soup delegateEventStream Redux Challenges

A Deferred Queue

Challenges

when2: An Improved jQuery.when

Using when2 to Time Out a Single Promise Differences from $.when Challenges

Timing Out Promises

Challenges

Controlling Your Own Destiny

Challenges

Deactivating a Promise

Challenges

4. More Time in the Mental Gymnasium

Do You Really Understand jQuery Deferreds? Promises/A+ Promises Are First-Class Objects for Function Calls Asynchronous Data Structures Advantages of Deferreds Difficulties with Deferreds Further Reading

A. Hints for Selected Challenges

A Replacement for the setTimeout Function Messaging in Chrome Extensions Accessing Chrome Local Storage Running Promise-Returning Functions One by One A Promise Pool with an emptyPromise Method Displaying Google Maps Communicating with a Web Worker Using Web Sockets Automatically Retrying Failing Deferred Calls Memoization Short-Term Memoization of In-Progress Function Calls Streaming Promise Events Getting the First Result from a Set of Promises A Deferred Queue when2: An Improved jQuery.when Timing Out Promises Controlling Your Own Destiny Deactivating a Promise

B. The Promises/A+ Specification

Terminology Requirements

Promise States The then Method The Promise Resolution Procedure

C. Converting an ArrayBuffer to Base 64 Colophon Copyright

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