From MEAN to the MERN Stack
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Replace Angular with React. Make the move from the MEAN stack to the powerful MERN Stack! Come and learn about the MERN stack. No, that isn't a typo. The MERN stack is Mongo, Express, and Node, with React instead of Angular. While both React and Angular are remarkable JavaScript technologies, React comes with less baggage. There is no TypeScript, no annotations, no bossy framework telling you how to do everything.
![Component
import {Component, OnInit} from 'angular2/core'
import {QuizService} from './quiz-service'
@Component({
selector: 'quiz',
templateUrl: './templates/quiz.html',
providers: [QuizService]
})
export class QuizComponent implements OnInit {
quizList: IQuizList[];
constructor(private _quizService:QuizService) {
}
ngOnInit() {
this.getQuiz();
}
getQuiz() {
this.quizList = this._quizService.getQuizzes();
}
}](https://image.slidesharecdn.com/mern-stack-warmup-light-170208023841/85/From-MEAN-to-the-MERN-Stack-39-320.jpg)
![Data Binding
C/D Attribute Binding type
—> {{ value }} one-way
—> [property] = “value” property
<— (event) = “handler” event
<—> [(ng-model)] = “property” two-way](https://image.slidesharecdn.com/mern-stack-warmup-light-170208023841/85/From-MEAN-to-the-MERN-Stack-41-320.jpg)
![Directive
import {Directive, ElementRef, Renderer, Input, OnInit} from 'angular2/core';
@Directive({
selector: '[sizer]'
})
export class Sizer implements OnInit {
@Input() sizer:string;
element:ELementRef;
renderer:Renderer;
constructor(element:ElementRef, renderer:Renderer) {
this.element = element;
this.renderer = renderer;
}
ngOnInit() {
this.renderer.setElementStyle(this.element.nativeElement,
'fontSize', this.sizer + '%');
}
}](https://image.slidesharecdn.com/mern-stack-warmup-light-170208023841/85/From-MEAN-to-the-MERN-Stack-44-320.jpg)
![Component + Directive
import {Directive, Component, ElementRef, Renderer} from ‘@angular/core';
import {Sizer} from './sizer'
@Component({
selector: 'my-app',
providers: [],
template: `
<div>
<p [sizer]="200">Butter{{name}}</p>
</div>
`,
directives: [Sizer]
})
export class App {
constructor() {
this.name = 'Monkey'
}
}](https://image.slidesharecdn.com/mern-stack-warmup-light-170208023841/85/From-MEAN-to-the-MERN-Stack-45-320.jpg)
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From MEAN to the MERN Stack
- 1. MEAN to MERN WeWork 7 Feb 2017
- 2. Troy Miles • Troy Miles aka the RocknCoder • Over 37 years of programming experience • Speaker and author • bit.ly/rc-jquerybook • [email protected] • @therockncoder • Now a lynda.com Author!
- 3. Build Mobile Apps! • Develop mobile apps with Ionic and AngularJS • Learn the Ionic CLI • Fetch data via ajax • Deploy your app to Android & iOS • bit.ly/ionicvideo
- 8. Tonight’s Agenda • The MEAN Stack • Heroku • MongoDB • NodeJS + Express • Angular 2 • The MERN Stack • MERN.io • MERN CLI • Redux + React Router • Electrode • Summary
- 9. Get Git • Get is a mandatory tool for using all open source tools • lots of free tutorials on how to use it • https://www.codeschool.com/learn/git • https://git-scm.com/
- 10. The MEAN Stack • MEAN is a free and open-source JavaScript software stack for building dynamic web sites and web applications. • Term coined by Valeri Karpov
- 11. MongoDB • MongoDB is an open-source, document database designed for ease of development and scaling. • v3.2 • Initial release - 2009 • https://www.mongodb.org/
- 12. Express • Fast, unopinionated, minimalist web framework for Node.js • v4.14 • http://expressjs.com/
- 13. Angular • HTML enhanced for web apps! • v2.2.3 • https://angular.io/
- 14. NodeJS • Node.js® is a platform built on Chrome's V8 JavaScript runtime for easily building fast, scalable network applications. • v7.2.0 • https://nodejs.org/
- 15. Benefits of the MEAN Stack • Isomorphic JavaScript • Open Source / Community Driven • Performance • Low Cost
- 16. Isomorphic JavaScript • One language all the way thru • Client/Server JavaScript • JSON as the data transport format • BSON as the data storage format • JavaScript to control Mongo DB
- 17. Why is JavaScript Beautiful? • It is a Functional Language - Closer to Lisp and Scheme than Java or C • First Class Functions • Dynamic Objects • Loose Typing • and more...
- 18. ECMAScript Versions Version Date ES1 June 1997 ES2 June 1998 ES3 December 1999 ES4 DOA 2006 ES5 December 2009 ES6/ES2015 June 2015 ES2016 2016
- 19. How to use ES6 today? • Use only the latest browsers • Use a transpiler: Babel, Traceur, Closure, TypeScript • Use Node.js • https://kangax.github.io/compat-table/es6/
- 20. Heroku
- 21. Installation • Create a free heroku account at: • https://www.heroku.com • Download + install heroku toolbelt at: • https://toolbelt.heroku.com/ • (the account is free, no credit card necessary)
- 22. Deploy to Heroku • heroku login • heroku create <app-name> • (must be unique) • git push heroku master • heroku open
- 23. MongoDB
- 24. Top DB Engines 1. Oracle 2. MySQL 3. MS SQL Server 4. MongoDB 5. PostgreSQL 6. DB2 7. MS Access 8. Cassandra 9. Redis 10.SQLite
- 25. Who Uses It? • Craigslist • eBay • Foursquare • SourceForge • Viacom • Expedia • LinkedIn • Medtronic • eHarmony • CERN • and more
- 26. When to Use Mongo? • Document Database • High Performance • High Availability • Easy Scalability • Geospatial Data
- 27. What is a Document? • An ordered set of keys and values • Like JavaScript objects • No duplicate keys allowed • Type and case sensitive • Field order is not important nor guaranteed
- 28. Node.js
- 29. Node v7 • Merged with the io.js project, which was at 3.x • New version of Chrome V8 • Supports ES6 • Faster • node -v
- 30. Node Package Manager • Or npm for short • version: npm -v • upgrade npm: npm install npm -g • (officially, npm doesn’t stand for anything, anymore)
- 31. package.json • required properties (error if missing) • name & version • optional properties (warning if missing) • description, repository, & license • other properties • scripts, dependencies, config, etc.
- 32. Use Environment Vars • process.env object holds all environment vars • Reading: var connect = process.env.connect; • Writing: process.env.mode = ‘test’; • NEVER PUT SECRET STUFF IN SOURCE CODE!
- 33. Express
- 34. Installation • npm install express-generator -g • npm install express —save
- 35. Angular
- 36. Angular 2 main concepts • Component • Data binding • Service • Directive • Dependency injection • Module
- 37. Metadata • Metadata is extra information which gives angular more info • @Component tells angular the class is a component • @Directive tells angular the class is a directive
- 38. Component • A class with component metadata • Responsible for a piece of the screen referred to as view. • Template is a form HTML that tells angular how to render the component. • Metadata tells Angular how to process a class
- 39. Component import {Component, OnInit} from 'angular2/core' import {QuizService} from './quiz-service' @Component({ selector: 'quiz', templateUrl: './templates/quiz.html', providers: [QuizService] }) export class QuizComponent implements OnInit { quizList: IQuizList[]; constructor(private _quizService:QuizService) { } ngOnInit() { this.getQuiz(); } getQuiz() { this.quizList = this._quizService.getQuizzes(); } }
- 40. Template/View • Is a way to describe a view using HTML • Templates can be included with the component • Or as a URL link to an HTML file • Best practice is to use an HTML file
- 41. Data Binding C/D Attribute Binding type —> {{ value }} one-way —> [property] = “value” property <— (event) = “handler” event <—> [(ng-model)] = “property” two-way
- 42. Service • “Substitutable objects that are wired together using dependency injection (DI)” • Used to share code across an app • Lazily instantiated • Angular has no “Service” defined type
- 43. Directive • A class with directive metadata • Two kinds: attribute & structural • Attribute directives alter the look or behavior of an existing element • Structural directives alter the layout by adding, removing, and replacing elements in the DOM • A component is a directive with a view
- 44. Directive import {Directive, ElementRef, Renderer, Input, OnInit} from 'angular2/core'; @Directive({ selector: '[sizer]' }) export class Sizer implements OnInit { @Input() sizer:string; element:ELementRef; renderer:Renderer; constructor(element:ElementRef, renderer:Renderer) { this.element = element; this.renderer = renderer; } ngOnInit() { this.renderer.setElementStyle(this.element.nativeElement, 'fontSize', this.sizer + '%'); } }
- 45. Component + Directive import {Directive, Component, ElementRef, Renderer} from ‘@angular/core'; import {Sizer} from './sizer' @Component({ selector: 'my-app', providers: [], template: ` <div> <p [sizer]="200">Butter{{name}}</p> </div> `, directives: [Sizer] }) export class App { constructor() { this.name = 'Monkey' } }
- 46. Dependency Injection • A way to supply a new instance of a class with the fully-formed dependencies it needs • Most dependencies are services • Angular know which services a components by looking at the types of its constructor parameters • Services are injected by an Injector which uses a Provider to create the service
- 47. Module • Modules are optional but a best practice • export tells TypeScript that the resource is a module available for other modules • import tells TypeScript the resource in a module • Angular ships a collection library modules
- 48. Webpack
- 49. Webpack? • Module bundler • Replaces System.JS • Works with JS, CSS, and HTML • Minifies, concatenates, and bundles
- 50. The MERN Stack • Keep Mongo, Express, and Node • Replace Angular with React • HashNode create mern-cli to scaffold a mern app • http://mern.io/
- 51. MERN CLI • A scaffolding tool to minimize setup time • npm install -g mern-cli • mern init <app_name> • cd <app_name> • npm install • npm start
- 52. mern commands Command Purpose mern init <name> initialize a MERN app mern list List MERN variants mern search <term> Search for a variant mern info <term> View details of a variant merng generates a component
- 53. npm commands Command Purpose npm run start start dev server npm run bs bundles, starts prod npm run test starts test runner npm run watch:test starts test runner in watch npm run coverage generates coverage report npm run lint runs linter
- 54. generator commands Command Purpose dumb-s <name> dumb comp in shared dumb-m <name> dump comp in module functional-s <name> functional comp in shared functional-m <name> functional comp in module module <name> create a module
- 55. React • A JavaScript library for building UIs • Created by Facebook & Instagram • Initial release March 2013 • Highly recommend reading their license
- 56. React • Virtual DOM • One-way data flow • JSX - JavaScript eXtension allows in HTML generation • Component-based
- 57. Flux • A pattern for managing data flow in your app • One way data flow • 4 main parts: Dispatcher, Store, Action, & View
- 58. The 4 main parts • Dispatcher: receives actions & dispatches them to stores • Store: holds the data of an app • Action: define app’s internal API • View: displays the data from stores
- 60. Redux • A predictable state container for JS apps • Works well with React Native • An alternative to & inspired by Flux • Single store for the entire app • Makes it easier to hot-load your app
- 61. React Router • A complete routing library for React • Keeps UI in sync with URL
- 62. Links • https://www.mongodb.org/ • http://expressjs.com/ • https://angular.io/ • https://nodejs.org/ • http://mongoosejs.com/ • https://www.heroku.com/
- 63. Links • https://facebook.github.io/react/ • https://facebook.github.io/flux/docs/overview.html • https://github.com/reactjs/react-redux • https://github.com/ReactTraining/react-router • http://mern.io/ • http://www.electrode.io/
- 64. Summary • React is easier to learn than Angular • When you add in parts like Redux, Flux and React Router, React is more complex than angular • In the end choose what is best for you and your team • Don’t give in to dogma