Book Image

Professional JavaScript

By : Hugo Di Francesco, Siyuan Gao, Vinicius Isola, Philip Kirkbride
Book Image

Professional JavaScript

By: Hugo Di Francesco, Siyuan Gao, Vinicius Isola, Philip Kirkbride

Overview of this book

In depth knowledge of JavaScript makes it easier to learn a variety of other frameworks, including React, Angular, and related tools and libraries. This book is designed to help you cover the core JavaScript concepts you need to build modern applications. You'll start by learning how to represent an HTML document in the Document Object Model (DOM). Then, you'll combine your knowledge of the DOM and Node.js to create a web scraper for practical situations. As you read through further lessons, you'll create a Node.js-based RESTful API using the Express library for Node.js. You'll also understand how modular designs can be used for better reusability and collaboration with multiple developers on a single project. Later lessons will guide you through building unit tests, which ensure that the core functionality of your program is not affected over time. The book will also demonstrate how constructors, async/await, and events can load your applications quickly and efficiently. Finally, you'll gain useful insights into functional programming concepts such as immutability, pure functions, and higher-order functions. By the end of this book, you'll have the skills you need to tackle any real-world JavaScript development problem using a modern JavaScript approach, both for the client and server sides.
Table of Contents (12 chapters)

Node Package Manager (npm)

When someone talks about Node Package Manager or npm for short, they can be referring to one or more of the following three things:

  • A command-line application that manages packages for a Node.js application
  • The repository where developers and companies publish their packages for others to use
  • The website where people manage their profile and search for packages

Most programming languages offer at least one way for developers to share packages with each other: Java has Maven, C# has NuGet, Python has PIP, and so on. Node.js started to ship with its own package manager just a few months after its initial release.

Packages can include any type of code that developers think would be useful to others. And sometimes, they also include tools to aid developers in terms of local development.

As the packaged code needs to be shared, there needs to be a repository where all the packages are stored. And to publish their packages, authors...