Npm
npm is a package-management system for JavaScript, comprising a command-line client and an online registry for discovering, installing, and publishing packages.
Web Components in Action
npm is a package manager and software registry for JavaScript and Node.js packages.
- How it is used
- Uses npm to install JavaScript packages, provide local development tooling, and run project scripts.
- How deep it goes
- Defines installations, dependencies, package.json, and scripts, but only gestures toward larger build systems.
- Examples
- Demonstrates installing http-server globally, adding Web Components polyfills, initializing package.json, and defining a test script.
- What you can do after
- Operate/configure npm to install packages, record dependencies, distinguish development dependencies, and run package.json scripts.
Bootstrapping Microservices, Second Edition: With Docker, Kubernetes, GitHub Actions, and Terraform
The default package manager for Node.js that installs packages and manages project metadata and dependencies.
- How it is used
- Manages packages and project metadata while setting up a Node.js microservice with Express.
- How deep it goes
- Works through initialization, installation, and dependency declarations; does not explain npm internals.
- Examples
- Uses `npm init -y`, `npm install express`, and an Express dependency entry in `package.json`.
- What you can do after
- Apply it via npm to initialize a project, install Express, and inspect its recorded dependency.
Essential TypeScript 5, Third Edition
npm is a package manager for installing and managing JavaScript packages and their dependencies.
- How it is used
- Uses npm to assemble and run the package-based toolchain for TypeScript projects and web applications.
- How deep it goes
- Explains dependency resolution, install scope, package.json records, version specifications, and commands; does not descend into npm implementation internals.
- Examples
- Uses npm init, versioned installs of TypeScript and tsc-watch, a package.json start script, and npm start.
- What you can do after
- Operate/configure it to initialize a project, install local development tools, distinguish dependency groups, and start a configured compiler script.
Read how Essential TypeScript 5, Third Edition explains npm →
Road to Kubernetes
npm is the package manager and registry ecosystem commonly used to install and manage Node.js packages.
- How it is used
- Supports initializing Node.js applications and installing their third-party dependencies.
- How deep it goes
- Explains initialization, local installation, and package.json tracking without descending into npm internals.
- Examples
- Uses npm init, npm install express, package.json, and project-directory listings as practical examples.
- What you can do after
- Apply it via npm to initialize projects, install Express.js, and record dependencies automatically.
D3.js in Action, Third Edition
npm is a package manager and registry ecosystem for installing and managing JavaScript packages.
- How it is used
- Supports installing and importing JavaScript libraries in D3 projects and frontend applications.
- How deep it goes
- Explains npm’s package installation and module-import workflow, but does not detail registry internals or dependency resolution.
- Examples
- Uses npm install, npm install d3, npm run start, and a D3 namespace import in a React dashboard.
- What you can do after
- Operate/configure JavaScript projects by installing dependencies, adding D3, starting applications, and importing packages.
Related concepts
- packageuses · A software package is a named grouping of modules or components, often with related resources and metadata, organized for import, reuse, distribution, or management.
- Node.jsused by · Node.js is an open-source JavaScript runtime built on the V8 engine that executes JavaScript outside web browsers and provides APIs for system and network operations.
- package.jsonuses · package.json is the standard JSON manifest for an npm or Node.js package, declaring metadata, dependencies, scripts, entry points, and related configuration.
- package managerkind of · A package manager is software that retrieves, installs, updates, removes, and manages software packages and their dependencies.
- Create React Appused by · Create React App is a command-line tool that scaffolds React applications with a preconfigured project structure, dependencies, and development environment.
- npxused by · npx is an npm command-line package runner that executes package-provided binaries from local dependencies or downloads packages when needed, without requiring global installation.
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