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)
1
Section 1 - What is JavaScript? What is it not?
6
Section 2 - Using JavaScript on the Front-End
13
Section 3 - The Back-End: Node.js vs. Python
20
Section 4 - Communicating with Databases

Summary

Webpack is our friend. It modularizes, minifies, chunks, and makes our code more efficient, as well as warning us when certain pieces aren't properly optimized. There are ways to silence these alerts, but in general, it's a good idea to listen to them and at least try to resolve them.

One burning question, though, that remains unanswered: doesn't increasing the number of files downloaded increase the load time? This is a common misconception that's hung around from the early days of the web: more files == more load time. The fact is, however, that multiple browsers can open many non-blocking streams simultaneously, allowing for a more efficient download than one huge file. Is this a solution for all multiple files? No: a CSS image sprite, for example, is still a more efficient use of image resources. For performance, we must toe a fine line on how to provide the best user experience, while combining that with the best developer experience. Entire books are...