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

Authentication versus authorization

As we begin our exploration of security with JavaScript, it's important to understand the vital difference between authentication and authorization. In a nutshell, authentication is a process whereby a system affirms and acknowledges that you are who you say you are. Think of going to the store to buy a bottle of wine. You may be asked to provide identification that proves you are of or above the legal consumption age of your locale. The clerk has authenticated you with your photo ID to say that yes, you are you because I, the clerk, have matched your face to the photo in the I.D. A second case is when you fly on an airline. When you pass through security, they're also going to check your ID for the same reason: are you who you say you are?

These two use cases end, however, with authorization. Authorization says: I know you are who you say you are. Now, are you allowed to do what you want? In our wine example, if you are above the age of 21...