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En este libro haremos un recorrido teórico y práctico por todo el ecosistema tecnológico que compone Node.js. Veremos desde su instalación en diferentes plataformas, hasta cómo crear programas, paso a paso y de manera detallada. En cada parte trataremos temas fundamentales que nos ayudarán a conocer y comprender mejor cada detalle de Node.js, sin necesidad de poseer conocimientos previos. Además, configuraremos el entorno de trabajo y, al mismo tiempo, crearemos programas de ejemplo utilizando los módulos de Node.js que estudiamos en cada capítulo. El libro está dividido en tres partes, con estos contenidos: • Parte I: ¿qué es Node.js? Indicaciones para realizar su instalación en diferentes plataformas. Análisis de su arquitectura (ECMAScript, JavaScript, motor V8). Guía paso a paso para el uso de los comandos node y npm. Diferencias entre la programación bloqueante y no bloqueante en Node.js. • Parte II: manejo del sistema de archivos (file system) y salida por consola. Creación de un servidor web utilizando el protocolo HTTP versión 2. Uso de Express para crear una API de tipo REST utilizando el módulo de ruteo y el retorno de datos en formato JSON. • Parte III: aplicación de Node.js en diferentes proyectos. Cómo conectarse a distintos motores de bases de datos, ejecutar operaciones CRUD sobre una API de tipo REST hecha con Node.js y Express, y publicar una aplicación en un ambiente productivo utilizando PM2. Todos los contenidos están redactados con un lenguaje claro y didáctico, alternando la parte teoría con ejemplos prácticos y actividades para facilitar la asimilación de los conceptos desarrollados.