Preface

Node.js is a massively popular JavaScript library that lets you use JavaScript to easily program scalable network applications and web services. People approaching Node.js for the first time are often attracted by its efficiency, scalability, and the fact that it's based on JavaScript, the language of the Web. This means that developers can use the same language to write backend code. Also, it's increasingly being looked upon as a modern replacement for PHP in web development, which relies on fast-paced data exchange. This growing community and the large amount of available modules makes Node.js one of the most attractive development environments.