Introduction to WebSockets. Creating a Node.js server and using WebSocket API in the browser

WebSocket is a protocol that makes two-way communication in real-time between the user and the server possible. A common use cases are chats and online multiplayer games. Today we cover implementing it both on frontend and backend. Let’s go! Explaining WebSockets WebSocket is a different protocol than HTTP. Despite that, to establish a connection, the client sends […]

JavaScript Testing

JavaScript testing #2. Introducing Enzyme and testing React components

This entry is part 2 of 14 in the JavaScript testing tutorial

At the previous part of the tutorial, we’ve briefly covered the basics of unit testing. This time we will go further and start testing React with the Enzyme library. Thanks to the that, your application will be more reliable and it will be easier to avoid regression. Even though we will be using Jest here, Enzyme also works […]

JavaScript Testing

JavaScript testing #1. Explaining types of tests. Basics of unit testing with Jest

This entry is part 1 of 14 in the JavaScript testing tutorial

Hello! Today we start another big series, which is about JavaScript testing. There are various different types of tests and we will start by explaining some of them. In the beginning, we will cover the basics of unit testing, which is testing individual parts of our application and checking if they are fit to use. To […]

JavaScript Webpack

Webpack 4 course – part six. Increasing development experience

This entry is part 6 of 8 in the Webpack 4 course

Today we will cover the development value of the mode property. It will automatically set the webpack configuration for you to make the development easier. Aside from that, we will also cover the wepback-dev-server and webpack-serve – Hot Module Replacement included. Let’s go! Webpack 4 course: a development server A one step forward to a better development experience […]

JavaScript Webpack

Webpack 4 course – part three. Working with plugins

This entry is part 3 of 8 in the Webpack 4 course

Hello! Today we introduce the concept of plugins. They differ from loaders in a way that they can perform a wider range of tasks. Basically, they do anything else, that loaders can’t do. While loaders are tied to a certain type of files, plugins can be more generic. This time we will learn what purpose […]