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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
1
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 4: Testing JavaScript

Activity 4 – Utilizing Test Environments

You have been tasked with upgrading your Fibonacci sequence test code to use the Mocha test framework. Take the Fibonacci sequence code and test code you created for Activity 1 and upgrade it to use the Mocha test framework to test the code. You should write tests for the n=0 condition, then implement the n=0 condition, then write tests for and implement the n=1 condition, then write tests for and implement the n=2 condition, and finally do so for the n=5, n=7, and n=9 conditions. If the it() test passes, call the done callback with no argument. Otherwise, call the test done callback with an error or other truthy value.

To utilize the Mocha test framework to write and run tests, follow these steps:

  1. Set up the project directory with npm run init. Install mocha globally with npm install mocha -s -g.

  2. Create index.js to hold the code and test.js to hold the tests.

  3. Add the test script to package.json in the scripts field. The test...

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