Love it or hate it, JavaScript is avidly eating the world of software development. From web sites and apps to servers, smartphones and connected objects, JavaScript is everywhere. It has evolved from a niche scripting tool crafted in a few days into a modern, multi-purpose language sitting on top of a rich ecosystem and a vibrant developer community. Some even consider JavaScript to be the most important technology in software development nowadays.

However, learning JavaScript properly is not that easy. Many resources are outdated and teach obsolete practices. Many others cover advanced topics that are of little interest to beginners and "switchers" coming from other languages and platforms.

This book will help you get off to a good start in the JavaScript universe or catch up with its newest evolutions. Here are some highlights:

• Designed to be as beginner-friendly as possible, while covering some advanced concepts and good practices.
• No complex setup needed: start working immediately from your browser.
• Written from scratch using the latest language version (ES6/ES2015), avoiding awkwardnesses from the past and giving you future-proof knowledge.
• Each chapter is accompanied by a series of exercises to put your newly acquired skills into practice.
• Entirely developed in the open on GitHub. Feel free to contribute!