Book Image

Cross-platform Desktop Application Development: Electron, Node, NW.js, and React

By : Dmitry Sheiko
Book Image

Cross-platform Desktop Application Development: Electron, Node, NW.js, and React

By: Dmitry Sheiko

Overview of this book

Building and maintaining cross-platform desktop applications with native languages isn’t a trivial task. Since it’s hard to simulate on a foreign platform, packaging and distribution can be quite platform-specific and testing cross-platform apps is pretty complicated.In such scenarios, web technologies such as HTML5 and JavaScript can be your lifesaver. HTML5 desktop applications can be distributed across different platforms (Window, MacOS, and Linux) without any modifications to the code. The book starts with a walk-through on building a simple file explorer from scratch powered by NW.JS. So you will practice the most exciting features of bleeding edge CSS and JavaScript. In addition you will learn to use the desktop environment integration API, source code protection, packaging, and auto-updating with NW.JS. As the second application you will build a chat-system example implemented with Electron and React. While developing the chat app, you will get Photonkit. Next, you will create a screen capturer with NW.JS, React, and Redux. Finally, you will examine an RSS-reader built with TypeScript, React, Redux, and Electron. Generic UI components will be reused from the React MDL library. By the end of the book, you will have built four desktop apps. You will have covered everything from planning, designing, and development to the enhancement, testing, and delivery of these apps.
Table of Contents (9 chapters)

Creating a service to fetch RSS

In a nutshell, our application is about reading RSS feeds. So, it would be the right thing to start with the service, which fetches the feed by a given URL and parses it into a structure that we could attach to the applications state. I suggest retrieving the feed XML with the request (https://www.npmjs.com/package/request) module and parsing it using the feedme module (https://www.npmjs.com/package/feedme). Let's do it first in plain JavaScript. So, we need to install both the packages:

npm i -S feedme
npm i -S request

We are going to have a function rss that uses request to fetch feed contents though HTTP(s). This function will accept two arguments: feed URL and a callback function written in a thunk-like manner of Node.js:

const request = require( "request" ); 
 
function rss( feedUrl, onDone ){ 
  const feed = { 
          title...