Book Image

Node Cookbook - Fourth Edition

By : Bethany Griggs
4 (1)
Book Image

Node Cookbook - Fourth Edition

4 (1)
By: Bethany Griggs

Overview of this book

A key technology for building web applications and tooling, Node.js brings JavaScript to the server enabling full-stack development in a common language. This fourth edition of the Node Cookbook is updated with the latest Node.js features and the evolution of the Node.js framework ecosystems. This practical guide will help you to get started with creating, debugging, and deploying your Node.js applications and cover solutions to common problems, along with tips to avoid pitfalls. You'll become familiar with the Node.js development model by learning how to handle files and build simple web applications and then explore established and emerging Node.js web frameworks such as Express.js and Fastify. As you advance, you'll discover techniques for detecting problems in your applications, handling security concerns, and deploying your applications to the cloud. This recipe-based guide will help you to easily navigate through various core topics of server-side web application development with Node.js. By the end of this Node book, you'll be well-versed with core Node.js concepts and have gained the knowledge to start building performant and scalable Node.js applications.
Table of Contents (14 chapters)

Enabling debug logs

debug is a popular library, used by many notable frameworks, including the Express.js and Koa.js web frameworks and the Mocha test framework. debug is a small JavaScript debugging utility based on the debugging technique used in Node.js core.

In the recipe, we'll discover how to enable debug logs on an Express.js application.

Getting ready

  1. Let's create an Express.js web application that we can enable debug logs on. We'll first need to create a new directory and initialize our project:
    $ mkdir express-debug-app
    $ cd express-debug-app
    $ npm init --yes
    $ npm install express
  2. Now, we'll create a single file named server.js:
    $ touch server.js
  3. Add the following code to server.js:
    const express = require("express");
    const app = express();
    app.get("/", (req, res) => res.send("Hello World!"));
    app.listen(3000, () => {
      console.log("Server listening on port 3000");
    });

Now...