Book Image

Express Web Application Development

By : Hage Yaaapa
Book Image

Express Web Application Development

By: Hage Yaaapa

Overview of this book

Express is a minimal and flexible node.js web application framework, providing a robust set of features for building single and multi-page, and hybrid web applications. It provides a thin layer of features fundamental to any web application, without obscuring features that developers know and love in node.js. "Express Web Application Development" is a comprehensive guide for those looking to learn how to use the Express web framework for web application development. Starting with the initial setup of the Express web framework, "Express Web Application Development" helps you to understand the fundamentals of the framework. By the end of "Express Web Application Development", you will have acquired enough knowledge and skills to create production-ready Express apps. All of this is made possible by the incremental introduction of more advanced topics, starting from the very essentials. On the way to mastering Express for application development, we teach you the more advanced topics such as routes, views, middleware, forms, sessions, cookies and various other aspects of configuring an Express application. Jade; the recommended HTML template engine, and Stylus; the CSS pre-processor for Express, are covered in detail. Last, but definitely not least, Express Web Application Development also covers practices and setups that are required to make Express apps production-ready.
Table of Contents (15 chapters)
Express Web Application Development
About the Author
About the Reviewers

Your first Express app

The best way to learn any new technology is to try it out using some practical examples. So, let's go ahead and build an Express app and find out how it works.

To ensure our experiments do not mess up our filesystem, let's create a directory named express-app in your home directory and build our app there:

$ cd ~
$ mkdir express-app
$ cd express-app

The app directory is ready and we can start building our first Express app.

The Express manifest file

In Chapter 1, What is Express?, we learned that Express apps are actually Node modules, which means our app also would need a manifest file. So, create a file named package.json in the app directory.

The package.json file can have more than a dozen fields, but for the sake for brevity, let's keep it minimal. Here is what it should look like:

  "name": "test-app",
  "version": "0.0.1",
  "private": true,
  "scripts": {
    "start": "node app"
  "dependencies": {
    "express": "3.2.6",
    "jade": "*"

The fields used...