Understanding Commands in package.json’s scripts

Basic Concepts of package.json

(1) What is it, and what is its purpose?

package.json is used to identify and manage project dependencies. It enables npm to start projects, run scripts, and install dependencies. A project must have a package.json file for npm to install dependency packages.

(2) Common Fields

You can generate a package.json file in a project using the following commands:

// Both commands are valid
npm init -y
npm init // Then press Enter continuously

{
  // Name and version are the most important; without them, modules cannot be installed
  "name": "package.json", // Project name
  "version": "1.0.0", // Project version (format: major.minor.patch)
  "private": true, // Whether it's a private project; typically, company projects are private
  "description": "", // Project description
  "main": "index.js", // Entry file
  "scripts": { // Specifies npm command shortcuts for running script commands
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "keywords": [], // Keywords, an array of strings to help others find your project
  "author": "", // Author
  "license": "ISC", // License
  "bugs": { // Provide a bug submission URL or email; users encountering issues with your module can report them here
    "url"…