Package.json Documentation

1. Introduction

The `package.json` file is a crucial part of any Node.js project. It contains metadata about the project, as well as configuration details and dependencies.

2. Package.json Content

{
  "name": "mandatory1",
  "version": "1.0.0",
  "description": "",
  "main": "app.js",
  "scripts": {
    "test": "jest --watch",
    "start": "node app.js",
    "dev": "nodemon app.js",
    "build:css": "postcss public/global.css -o public/styles.css",
    "start:dev": " npm run build:css && npm run dev",
    "lint": "eslint .",
    "lint:fix": "eslint . --fix"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "autoprefixer": "^10.4.7",
    "ejs": "^3.1.8",
    "express": "^4.18.1",
    "postcss": "^8.4.14",
    "supertest": "^6.3.4",
    "tailwindcss": "^3.1.5"
  },
  "jest": {
    "testEnvironment": "node"
  },
  "devDependencies": {
    "eslint": "^8.57.0",
    "postcss-cli": "^10.0.0",
    "jest": "^29.7.0",
    "supertest": "^6.1.6"
  }
}

The above JSON represents the content of your `package.json` file. Customize your project details accordingly.

3. Examples and Details

Below are examples of common fields in a package.json{" "} file along with explanations:

3.1 Scripts

"scripts": {
"test": "jest --watch",
"start": "node app.js",
"dev": "nodemon app.js",
"build:css": "postcss public/global.css -o public/styles.css",
"start:dev": " npm run build:css && npm run dev",
"lint": "eslint .",
"lint:fix": "eslint . --fix"
}

In this example:

npm run test: Executes the specified test command.
npm run start: Starts the application using the node servercommand.
npm run dev: Starts the application with nodemon, a tool that automatically restarts the server on file changes during development.
npm run lint: Runs ESLint to analyze your codebase and identify potential issues or violations of coding standards. ESLint is configured to enforce rules defined in your project's ESLint configuration file.

3.2 Dependencies

"dependencies": {
"autoprefixer": "^10.4.7",
"ejs": "^3.1.8",
"express": "^4.18.1",
"postcss": "^8.4.14",
"supertest": "^6.3.4",
"tailwindcss": "^3.1.5"
}

The dependencies section lists external packages required by the project. The version numbers specify the range of acceptable versions for each package.

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