JavaScript Next : Your Complete Guide to the New Features Introduced in JavaScript, Starting From ES6 to ES9

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. Front Matter ....Pages i-xx let and const — The New Declarations on the Block (Raju Gandhi)....Pages 1-12 Lambdas with Arrow Functions (Raju Gandhi)....Pages 13-26 Effective Function Signatures with Default and Rest Parameters (Raju Gandhi)....Pages 27-40 Divide and Conquer with Object and Array Destructuring (Raju Gandhi)....Pages 41-66 Formatted Strings Using Template Strings (Raju Gandhi)....Pages 67-80 Maps and Sets—The New Data-structures on the Block (Raju Gandhi)....Pages 81-98 Bright Shiny Object(s) using Enhanced Object Literals (Raju Gandhi)....Pages 99-109 Hiding Behind Symbols (Raju Gandhi)....Pages 111-125 Iterable Sequences with Generators and Iterators (Raju Gandhi)....Pages 127-145 Avoiding Callbacks with Promises (Raju Gandhi)....Pages 147-157 Many of a Kind with Classes (Raju Gandhi)....Pages 159-171 Namespacing Code Using Modules (Raju Gandhi)....Pages 173-189 Metamorphosis with Proxy and Reflect (Raju Gandhi)....Pages 191-210 Seemingly Imperative with async and await (Raju Gandhi)....Pages 211-222 Asynchronous Iterators and Generators—A Meeting of the Minds (Raju Gandhi)....Pages 223-235 Back Matter ....Pages 237-241