JavaScript Next

JavaScript has finally grown up. Armed with a slew of new features, JavaScript now makes writing the code that powers your applications elegant, concise, and easy to understand. This book is a pragmatic guide to the new features introduced in JavaScript, starting with Edition 6 of ECMAScript, and ending with Edition 9. 

Using a "compare and contrast" approach, each chapter offers a deep dive into new features, highlighting how best to use them moving forward. As you progress through the book, you'll be offered multiple opportunities to see the new features in action, and in concert with one another.

Backed by an example-driven writing style, you'll learn by doing, and get ready to embrace the new world of JavaScript. 

What You'll Learn

• Provide a deep exposition of the new features introduced in ES6 through ES9 
• Review how JavaScript's new features by-pass any limitations of an existing approach
• Examine the refactoring necessary to go from old to new
• Demonstrate how JavaScript's new features work in unison with each other 

Who This Book Is For

New and experienced developers who wish to keep abreast of the changes to JavaScript and deepen their understanding of the language. 

Table of contents

Let and const — The New Declarations on the Block
Lambdas with Arrow Functions
Effective Function Signatures with Default and Rest Parameters
Divide and Conquer with Object and Array Destructuring
Formatted Strings Using Template Strings
Maps and Sets—The New Data-structures on the Block
Bright Shiny Object(s) using Enhanced Object Literals
Hiding Behind Symbols
Iterable Sequences with Generators and Iterators
Avoiding Callbacks with Promises
Many of a Kind with Classes
Namespacing Code Using Modules
Metamorphosis with Proxy and Reflect
Seemingly Imperative with async and await
Asynchronous Iterators and Generators – A Meeting of the Minds