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The JavaScript Workshop
The JavaScript Workshop

The JavaScript Workshop: Learn to develop interactive web applications with clean and maintainable JavaScript code

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Profile Icon Joseph Labrecque Profile Icon Alonzo L. Hosford Profile Icon Gaurav Mehla Profile Icon Nick Turner Profile Icon Daniel Rosenbaum Profile Icon Jahred Love Profile Icon Florian Sloot Profile Icon Philip Kirkbride +4 more Show less
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$43.99
Full star icon Full star icon Full star icon Full star icon Empty star icon 4 (8 Ratings)
Paperback Nov 2019 802 pages 1st Edition
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Arrow left icon
Profile Icon Joseph Labrecque Profile Icon Alonzo L. Hosford Profile Icon Gaurav Mehla Profile Icon Nick Turner Profile Icon Daniel Rosenbaum Profile Icon Jahred Love Profile Icon Florian Sloot Profile Icon Philip Kirkbride +4 more Show less
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$43.99
Full star icon Full star icon Full star icon Full star icon Empty star icon 4 (8 Ratings)
Paperback Nov 2019 802 pages 1st Edition
eBook
$20.98 $29.99
Paperback
$43.99
Subscription
Free Trial
Renews at $19.99p/m
eBook
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The JavaScript Workshop

2. Working with JavaScript

Overview

By the end of this chapter, you will be able to operate a modern integrated development environment (IDE); identify and describe basic JavaScript structures; describe different JavaScript environments; recognize the major views and their uses within the popular web browser developer tools and construct HTML elements and modify their various attributes.

In this chapter, you will get an overview of some popular tools for writing JavaScript and the various available runtimes for executing code with a modern web browser and beyond.

Introduction

In the previous chapter, we explored a historical overview of JavaScript and examined the language's relationship with the Standard ECMAScript. We then explored JavaScript by accessing the developer tools of various browsers to provide a basic introduction to how JavaScript can be accessed.

Now that we are familiar with JavaScript in a more cerebral way, it's time for some hands-on work with the language. First, we'll provide an overview of some popular tools for writing JavaScript and of the various runtimes available for executing code. With those installed, we can begin writing some JavaScript in order to gain some familiarity with the language's syntax and structure—how to write code in a meaningful way and how to include it in a web environment.

Within this chapter, we will pay particular attention to the primary target for most JavaScript environments and a great tool in itself—the modern web browser. In the previous chapter...

Integrated Development Environments (IDE)

JavaScript is a language that is interpreted at runtime as there is no need for us to compile it beforehand. There are other ways of writing JavaScript in a non-direct way, such as through transpilation or compilation, but we'll review those later. Before we get too far into working with JavaScript and writing code, we should examine the benefits of using a dedicated development environment to write and manage our JavaScript code.

Using an IDE aligned with the platform and languages you work with provides a number of benefits over a simple text editor. For example, IDEs usually include the following features:

  • Linting, formatting, and other cleanup utilities
  • Integrated Terminal and command-line access
  • Programming language debugging tools
  • Robust code completion and hinting as you type
  • Snippets and preformed code content
  • Built-in compilers (depending on the language and platform)
  • Potential emulation...

JavaScript Project and File Management

Now that we have our development environment installed, we need to consider some best practices in terms of where we should store projects on our local machine, and how we should organize folders and files within each project. We'll also walk through a small exercise that will demonstrate how to load a project (including all associated files) into Visual Studio Code.

Project Folders and Files

It is advisable to set aside a directory on your local machine where you will place all the projects that you may be working on. For instance, you could create a directory called Projects on your local disk and then create specific project folders within it—one for each distinct project. This way, you can be sure of where all your projects are located. You can even create a shortcut to your Projects folder to get at it easily whenever you like:

Figure 2.6: Example of a Projects directory on macOS

Individual...

JavaScript Syntax and Structure

Now that we've installed an IDE and established how to manage a working project folder within our code editor, it's time to look at how JavaScript code is written and ordered within such an environment. The first thing we need to do is create a set of files within the Project folder because we will write our JavaScript instructions in these. We will create a set of files within the working project folder and then bind them to one another.

Exercise 2.02: Creating Project Boilerplate

The most common environment where JavaScript runs is inside a web browser. For JavaScript to run within this environment, it must be included within a host HTML file in some way. Let's create a basic HTML file and a JavaScript file and instruct the web browser to load our JavaScript file within the HTML at runtime. Let's get started:

  1. Open the working project folder you created previously within your IDE (Visual Studio Code). No files...

Overview of JavaScript Environments

So far in our journey, we've only been exposed to the modern web browser as a JavaScript runtime, but even within browsers, there are a variety of JavaScript engines that serve as different runtimes for JavaScript. For instance, Chrome has the V8 engine, while Firefox runs JavaScript through SpiderMonkey. Just about every browser has its own distinct engine.

There are also other runtimes aside from those that are browser-based. We'll have a look at the variety of runtimes available to us now.

Browser-Based JavaScript

By far, the most common environment for using JavaScript throughout its entire history as a language is within the web browser. We've already spoken of this particular runtime quite a lot, so we will not spend time going over all of this again:

Figure 2.20: V8—JavaScript in the web browser

Some of the benefits of using the web browser as a JavaScript runtime are as follows:

    ...

A Closer Look at Web Browser Developer Tools

In the previous chapter, we had a brief introduction to working with browser developer tools. We'll expand on our exploration of browser developer tools and examine a sample of the most used views when it comes to working with JavaScript in the web browser.

Of course, there are many other views and options than what will be mentioned here and, while we are examining these from within Google Chrome, they will differ in both overall look and functional use from browser to browser. This should give you a good idea of what is possible, though, no matter what your preferred browser is.

Note

To access Developer Tools in Google Chrome, press the F12 key.

The Elements View

The primary view that you'll be presented with when exploring browser developer tools for the first time will most likely be the Elements view. This view is super useful as it presents all the elements of a web document and the associated content and attributes...

HTML Element Manipulation with JavaScript

We have alluded to the ability of JavaScript to directly manipulate elements within an HTML document a number of times. We'll now go ahead and see firsthand exactly how the language can be leveraged to perform this sort of manipulation.

Before moving on to the activity, there are a couple of concepts to understand so that you know how HTML elements function. As you've seen through example, elements in HTML generally consist of an opening and closing tag, within which there is often text data. If you think of a <p> tag or paragraph element in HTML, the text within that element, between the opening and closing tags, is the text displayed to the user.

If we need to address a specific HTML element to manipulate, the best way to do so is with the getElementById() JavaScript method. Of course, the element in question must contain an ID attribute for this to function as expected.

For example, maybe we have a simple HTML...

Summary

In this chapter, we had a look at different popular IDEs for writing and maintaining JavaScript code and chose Visual Studio Code as our primary editor for this portion of this book. We then used this editor to examine JavaScript file structures, syntax, and project management tasks. Following that, we had a brief overview of different JavaScript runtime environments—from the browser to the desktop, remote servers, and mobile devices. Finally, we had a better look at the various web browser developer tools available to us and performed an activity that allowed for the manipulation of HTML elements and their various attributes.

In the next chapter, we will explore fundamental concepts and structures that are involved when we're working in JavaScript, cover the basics from object types to conditionals and looping structures, how to go about writing and invoking functions, and even commenting out and debugging code.

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Key benefits

  • Learn the basics of JavaScript programming to create dynamic web pages
  • Explore the fundamentals of back-end development using Node.js
  • Tackle challenging development problems and apply solutions to real-world situations

Description

If you're looking for a programming language to develop flexible and efficient apps, JavaScript is a great choice. However, while offering real benefits, the complexity of the entire JavaScript ecosystem can be overwhelming. This Workshop is a smarter way to learn JavaScript. It is specifically designed to cut through the noise and help build your JavaScript skills from scratch, while sparking your interest with engaging activities and clear explanations. Starting with explanations of JavaScript's fundamental programming concepts, this book will introduce the key tools, libraries and frameworks that programmers use in everyday development. You will then move on and see how to handle data, control the flow of information in an application, and create custom events. You'll explore the differences between client-side and server-side JavaScript, and expand your knowledge further by studying the different JavaScript development paradigms, including object-oriented and functional programming. By the end of this JavaScript book, you'll have the confidence and skills to tackle real-world JavaScript development problems that reflect the emerging requirements of the modern web.

Who is this book for?

The JavaScript Workshop is the ideal guide to JavaScript for beginners. It is designed for anyone who wants to get started learning JavaScript. Whether you're an aspiring web developer, or are just curious about learning how to code with a versatile programming language, this book will help you get up and running. Previous development experience is not required, but basic prior knowledge of HTML and CSS will help you get the most from this book.

What you will learn

  • Write clean, maintainable and eloquent JavaScript code
  • Build websites using plain JS and various frameworks and libraries
  • Simplify your workflow with package managers such as Gulp and Grunt
  • Use Node.js to build server-side JavaScript applications
  • Improve the functionality of your applications with browser APIs
  • Implement asynchronous programming to build apps that can multitask
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Table of Contents

15 Chapters
1. Getting to Know JavaScript Chevron down icon Chevron up icon
2. Working with JavaScript Chevron down icon Chevron up icon
3. Programming Fundamentals Chevron down icon Chevron up icon
4. JavaScript Libraries and Frameworks Chevron down icon Chevron up icon
5. Beyond the Fundamentals Chevron down icon Chevron up icon
6. Understanding Core Concepts Chevron down icon Chevron up icon
7. Popping the Hood Chevron down icon Chevron up icon
8. Browser APIs Chevron down icon Chevron up icon
9. Working with Node.js Chevron down icon Chevron up icon
10. Accessing External Resources Chevron down icon Chevron up icon
11. Creating Clean and Maintainable Code Chevron down icon Chevron up icon
12. Using NextGeneration JavaScript Chevron down icon Chevron up icon
13. JavaScript Programming Paradigms Chevron down icon Chevron up icon
14. Understanding Functional Programming Chevron down icon Chevron up icon
15. Asynchronous Tasks Chevron down icon Chevron up icon

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david griffin Aug 02, 2021
Full star icon Full star icon Full star icon Full star icon Full star icon 5
I have been writing JavaScript code for a couple of years now and I have to say this book is COMPREHENSIVE to say the least. I learned something new every chapter. This is a long book but well worth the read if you are a dev or an aspiring dev. I look forward to reading again soon!
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shahriyar Jun 02, 2021
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If you would like to get familiar with JavaScript from entry level and gain some real world experience and useful content, this book is recommended for you! Don't worry if you have no idea of web developing tools or even installation steps; This book is a self guide and easy to understand.
Amazon Verified review Amazon
Mark kho May 27, 2021
Full star icon Full star icon Full star icon Full star icon Full star icon 5
I enjoyed reading the JavaScript Workshop. It's a good book for people who would like to learn the fundamentals and also some advanced concepts. If you are in search of a book that will help learn Javascript, this is the book for you!
Amazon Verified review Amazon
K. Skelton May 27, 2021
Full star icon Full star icon Full star icon Full star icon Full star icon 5
I received an e-book copy of this title in exchange for a review. I have been a teaching assistant at code bootcamps as well as in university courses, and I am a full-time professional software engineer.I recommend this book for self learners as well as folks who need a refresher on modern JavaScript. The chapters are well designed: they're dense without being overwhelming; they are well organized with easy to find topics; the examples are typically something that might be part of a larger application. The first chapter is an overview of the history of JS and how it fits into software development as a whole. It sets the tone that the authors want you to explore code and do so using HTML, CSS and JS without over explaining what's going on. You need to trust that the authors will fill in these blanks and from a teaching perspective they're establishing the context of what can be done with the material (code); to use a fishing metaphor they're setting the hook.The remaining chapters cover JS topics, though in such a way that the engineering/science principles are being taught in parallel with the code syntax. Understanding flow control and iterators is core to all programming and those concepts are as well explained as the JS code that makes it happen. In the case where a built-in object is discussed ("Date" comes to mind) the authors include handy tables that include the properties on the object and what it does. Example - Method: getDay() Description: Get the weekday as a number from 0 to 6.Each chapter has several code exercises/examples which I found to be extremely thorough. The jaded might call the examples hand-holding. But for the learner who is new I think having explicit step-by-step instructions and screenshots (as well as information about what should happen with each step) will be very valuable.There is a lot of competition in coding books at this price point. I think this would be a very good investment.
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Amazon Customer Nov 05, 2020
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Completed the online JavaScript Workshop and enjoyed it. I have been developing with JavaScript on and off for the past 20 years but wanted to brush up on modern JavaScript development.I found the workshop a good overview of JavaScript. It goes into each topic enough so you have a basic grasp of the functionality and know enough to dive in deeper by yourself.The pacing of the workshop is fast and you need to absorb lots of information but I liked that.Not sure this is the best course for an absolute beginner at JavaScript. Would recommend it for developers who have some JavaScript experience but want to build on that and develop their skills further.
Amazon Verified review Amazon
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