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)

2. Node.js and npm

Activity 3: Creating a npm Package to Parse HTML


  1. In an empty folder, use npm to create a new package. You can use all the default values for the options:
    $ npm init
    This utility will walk you through creating a package.json file.
    It only covers the most common items, and tries to guess sensible defaults.
    See 'npm help json' for definitive documentation on these fields and exactly what they do.
    Use 'npm install <pkg>' afterwards to install a package and save it as a dependency in the package.json file.
    Press ^C at any time to quit.
    package name: (Activity03) 
    version: (1.0.0) 
    entry point: (index.js) 
    test command: 
    git repository: 
    license: (ISC) 
    About to write to .../Lesson02/Activity03/package.json:
      "name": "Activity03",
      "version": "1.0.0",
      "description": "",