Book Image

Modern JavaScript Web Development Cookbook

By : Federico Kereki
Book Image

Modern JavaScript Web Development Cookbook

By: Federico Kereki

Overview of this book

JavaScript has evolved into a language that you can use on any platform. Modern JavaScript Web Development Cookbook is a perfect blend of solutions for traditional JavaScript development and modern areas that developers have lately been exploring with JavaScript. This comprehensive guide teaches you how to work with JavaScript on servers, browsers, mobile phones and desktops. You will start by exploring the new features of ES8. You will then move on to learning the use of ES8 on servers (with Node.js), with the objective of producing services and microservices and dealing with authentication and CORS. Once you get accustomed to ES8, you will learn to apply it to browsers using frameworks, such as React and Redux, which interact through Ajax with services. You will then understand the use of a modern framework to develop the UI. In addition to this, development for mobile devices with React Native will walk you through the benefits of creating native apps, both for Android and iOS. Finally, you’ll be able to apply your new-found knowledge of server-side and client-side tools to develop applications with Electron.
Table of Contents (15 chapters)

Adding middleware

Express bases all of its functionality on a key concept: middleware. If you work with plain vanilla Node, you have to write a single large request handler that will have to take care of all of the requests your server may receive. By using middleware, Express lets you break down this process into smaller pieces, in a more functional, pipeline-ish sort of way. If you need to check security, log requests, handle routing, and so on, all will be done by appropriately placed middleware functions.

First, let's understand how Express differs from Node, see how we can add some basic middleware of our own, and only then move on to apply the usual functions for common needs. Refer to the following diagram for more information:

Standard processing, in absence of the Express middleware handling your code must do all of the processing

In standard processing...