Book Image

Hands-on JavaScript for Python Developers

By : Sonyl Nagale
Book Image

Hands-on JavaScript for Python Developers

By: Sonyl Nagale

Overview of this book

Knowledge of Python is a great foundation for learning other languages. This book will help you advance in your software engineering career by leveraging your Python programming skills to learn JavaScript and apply its unique features not only for frontend web development but also for streamlining work on the backend. Starting with the basics of JavaScript, you’ll cover its syntax, its use in the browser, and its frameworks and libraries. From working with user interactions and ingesting data from APIs through to creating APIs with Node.js, this book will help you get up and running with JavaScript using hands-on exercises, code snippets, and detailed descriptions of JavaScript implementation and benefits. To understand the use of JavaScript in the backend, you’ll explore Node.js and discover how it communicates with databases. As you advance, you’ll get to grips with creating your own RESTful APIs and connecting the frontend and backend for holistic full-stack development knowledge. By the end of this Python JavaScript book, you’ll have the knowledge you need to write full-fledged web applications from start to finish. You’ll have also gained hands-on experience of working through several projects, which will help you advance in your career as a JavaScript developer.
Table of Contents (26 chapters)
Section 1 - What is JavaScript? What is it not?
Section 2 - Using JavaScript on the Front-End
Section 3 - The Back-End: Node.js vs. Python
Section 4 - Communicating with Databases

The elephant in the room – whitespace

OK, OK, we know that Python is whitespace-delimited: tabs matter! However, JavaScript really doesn't care about whitespace in most cases. As we saw before, indentation and whitespace is a matter of style, not syntax.

So here's the thing: when I was first learning Python, the idea of a language that was whitespace-dependent was abhorrent. "How could a language that could break with an improper IDE setting survive?", I thought. My opinions aside, the good news is that indentation in Python is parallel to indentation plus curly braces in JavaScript.

Here's an example:

Python JavaScript
def hello_world(x):
if x > 3:
x += 1
x += 2
return x
function helloWorld(val) {
if (val > 3) {
return ++val
} else {
return val+2

If you notice, our if statement inside our Python function is indented in the same way that this JavaScript example is indented, albeit without the curly braces. So yay...