There are a number of text conventions used throughout this book.

Code in text: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "Mount the downloaded WebStorm-10*.dmg disk image file as another disk in your system."

A block of code is set as follows:

const { Router } = require("express");
const router = Router();
router.get("/", (req, res) => {
  res.render("index");
});
module.exports = router;

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

const express = require("express");
const app = express();
const debug = require("debug")("my-server");
app.get("/", (req, res) => {
  debug("HTTP GET request to /");
  res.send("Hello World!");
});

Any command-line input or output is written as follows:

> new Buffer(10)
<Buffer b7 20 00 00 00 00 00 00 00 2c>

Bold: Indicates a new term, an important word, or words that you see on screen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "Select System info from the Administration panel."

Tips or important notes

Appear like this.