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  • Book Overview & Buying Advanced JavaScript
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Advanced JavaScript

Advanced JavaScript

By : Zachary Shute
3.5 (4)
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Advanced JavaScript

Advanced JavaScript

3.5 (4)
By: Zachary Shute
Buy this Book

Overview of this book

If you are looking for a programming language to develop flexible and efficient applications, JavaScript is an obvious choice. Advanced JavaScript is a hands-on guide that takes you through JavaScript and its many features, one step at a time. You'll begin by learning how to use the new JavaScript syntax in ES6, and then work through the many other features that modern JavaScript has to offer. As you progress through the chapters, you’ll use asynchronous programming with callbacks and promises, handle browser events, and perform Document Object Model (DOM) manipulation. You'll also explore various methods of testing JavaScript projects. In the concluding chapters, you'll discover functional programming and learn to use it to build your apps. With this book as your guide, you'll also be able to develop APIs using Node.js and Express, create front-ends using React/Redux, and build mobile apps using React/Expo. By the end of Advanced JavaScript, you will have explored the features and benefits of JavaScript to build small applications.
Table of Contents (9 chapters)
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Advanced JavaScript
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Advanced JavaScript
Preface
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Preface
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1
Introducing ECMAScript 6
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Introducing ECMAScript 6
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Introduction
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Beginning with ECMAScript
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Understanding Scope
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Declaring Variables
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Introducing Arrow Functions
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Learning Template Literals
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Enhanced Object Properties
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Destructuring Assignment
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Classes and Modules
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Transpilation
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Iterators and Generators
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Summary
2
Asynchronous JavaScript
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Asynchronous JavaScript
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Introduction
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Asynchronous Programming
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Callbacks
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Promises
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Async/Await
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Summary
3
DOM Manipulation and Event Handling
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DOM Manipulation and Event Handling
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Introduction
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DOM Chaining, Navigation, and Manipulation
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DOM Events and Event Objects
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JQuery
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Summary
4
Testing JavaScript
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Testing JavaScript
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Introduction
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Testing
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Types of Testing
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Test Tools and Environments
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Summary
5
Functional Programming
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Functional Programming
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Introduction
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Introducing Functional Programming
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Declarative Versus Imperative
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Pure Functions
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Higher Order Functions
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Shared State
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Immutability
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Side Effects
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Function Composition
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Summary
6
The JavaScript Ecosystem
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The JavaScript Ecosystem
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Introduction
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JavaScript Ecosystem
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Node.js
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React
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Summary
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Appendix
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Appendix
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Chapter 1: Introducing ECMAScript 6
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Chapter 2: Asynchronous JavaScript
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Chapter 3: DOM Manipulation and Event Handling
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Chapter 4: Testing JavaScript
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Chapter 5: Functional Programming
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Chapter 6: JavaScript Ecosystem

Chapter 2: Asynchronous JavaScript

Activity 2 – Using Async/Await

You have been tasked with building a server that interfaces with a database. You must write some code to look up sets and look up basic user objects in the database. Import the simple_db.js file. Using the get and insert commands, write the following program using the async/await syntax:

  • Look up the key called john, the key sam, and your first name as a database key.

  • If the database entry exists, log the age field of the result object.

  • If your name does not exist in the database, insert your name and associate an object containing your first name, last name, and age. Look up the new data association and log the age.

For any db.get operation that fails, save the key into an array. At the end of the program, print the keys that failed.

DB API:

db.get( index ):

This takes in an index and returns a promise. The promise is fulfilled with the db entry associated with that index. If the index does not exist, the db lookup fails, or the key...

CONTINUE READING
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Advanced JavaScript
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