Node.js Getting Started &amd Best Practices
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This document provides an overview of Node.js, including getting started, best practices, features, challenges, and deployment. It discusses Node.js basics, when to use it, popular applications, development tools, key features like modules and events, the NPM package manager, common mistakes, alternatives to callbacks, important packages, and deployment/monitoring best practices.
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Node.js Getting Started &amd Best Practices
- 1. Node.js Getting Started & Best Practices Charlotte Bots and AI Meetup – January 2017
- 2. Introduction Ramu Pulipati botsplash.com Conversational bots for News media & verticals botsplash.com
- 3. Agenda • Getting Started – Basics – Development Tools – Features – Challenges • Best Practices – Working with Node – Common Mistakes – Deployment & Monitoring
- 4. Basics • What is it? Javascript Runtime • Created by Ryan Dhal in 2009 and managed by Node.js foundation • Early adopters: – Walmart, Netflix, Microsoft, LinkedIn, Paypal, ebay, Facebook, NY Times, Uber, Many Startups
- 5. When to use • Why use it? – Easy to get started, learn and deploy – Can build variety of applications – Lots of open source packages and strong community – Excellent performance (if done correctly) – Javascript is everywhere. Talent pool. • When NOT to use it? – Compute =intensive tasks – Need multiple threads/processes communication – Strongly Typed Language* (Flow & TypeScript could considered)
- 6. Applications • Web applications (front end + server side) • REST APIs • Real-time applications/Web sockets (Socket.io) • Mobile Apps (React Native) • Desktop development (Electron) • Chatbots (Slack, Facebook) • Web crawlers (Cheerio) • Internet of Things • Command line tools
- 7. Development Tools • Getting Started – NVM for development – Use platform binary or compile source for prod • Editor Choices & Plugins – Atom Editor with Nuclide plugin – Visual Studio Code (for MS devs) • Debugging Using good tools/packages and practices will help build better code and less frustration/errors with interpreted code
- 8. Node.js Features • Node Event Loop • Module system • Event Emitter • API for file system, sockets and processes • Clustering • ES5, ES6 and ES7 support: http://node.green/
- 9. NPM • Node Package Manager (installed with node) • Getting started commands – npm init – npm –save or npm –save-dev – npm install – gulp/grunt – npm start
- 10. Challenges • Interpreted code is a trap for large projects • Multiple way to things (see screen) • Everyday a new package is popular
- 11. BEST PRACTICES
- 12. Working with Node.js • Project structure & npm link • Lint your code & follow style guide • Use Types – Flow vs TypeScript • Nodemon, gulp, grunt and webpack • Write tests for reusing code • Debugging using node-inspector
- 13. Common Mistakes • Using new operator • Callbacks, Promises, Async/Await • Code refactoring • Large code base • Handle errors – try/catch, promises
- 15. Must Have Packages Package Purpose momentjs Defacto datetime library lodash Defacto collections library request/fetch/axios Web client – REST and HTTP bluebird/async Defacto Promise library passport Web Authentication sequelize Defacto ORM dotenv Load environment variables Winston Defacto Logging eslint/babel Code linting gulp/grunt Task/build manager express/restify/sails/hel met Web applications nodemailer Email
- 16. Deployment and Monitoring • Prod deployment using Clustering or PM2 • Deployment: Nginx or Heroku or AWS Lambda • Nginx is setup as reverse proxy • Use papertrial or loggly or newrelic for log monitoring • Upgrading version (wait for 6 months)
- 17. Further Reading • Javascript – The good parts • NVM: https://github.com/creationix/nvm & https://github.com/coreybutler/nvm-windows • Style guide - https://github.com/airbnb/javascript • Node.js support: http://node.green • Web frameworks: http://www.tothenew.com/blog/10-powerful- node-js-frameworks-for-web-application- development/