MEAN Stack WarmupPeopleSpace 29 Nov 2016

Troy Miles• Troy Miles aka the RocknCoder

• Over 37 years of programming experience

• Speaker and author

• bit.ly/rc-jquerybook

• rockncoder@gmail.com

• @therockncoder

• Now a lynda.com Author!

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

Affordable JavaScript Weekend Workshops @PeopleSpace

• MEAN Stack / Jan 28 + 29 Create Full Stack Web Apps in JavaScript

• Intro to React / Feb 18 + 19 Deep dive into the Super Popular Library for Build UIs

• Angular 2 / Mar 11 + 12 A Deep Dive into the Latest Version of the Popular Front End Framework by Google

20% off 24 Hours Only

code: ROCKNCODER20Expires 11/30/2016

meanstackweekend.eventbrite.com

Tonight’s Agenda• What is the MEAN Stack?

• Heroku

• MongoDB

• NodeJS + Express

• Angular 2

• Some code

What is 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

MongoDB

• MongoDB is an open-source, document database designed for ease of development and scaling.

• v3.2

• Initial release - 2009

• https://www.mongodb.org/

Express

• Fast, unopinionated, minimalist web framework for Node.js

• v4.14

• http://expressjs.com/

Angular

• HTML enhanced for web apps!

• v2.2.3

• https://angular.io/

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/

Git + GitHub

• Free and open source distributed version control system

• v2.8

• https://git-scm.com/

• https://github.com/

Benefits of the MEAN Stack

• Isomorphic JavaScript

• Open Source / Community Driven

• Performance

• Low Cost

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

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...

ECMAScript VersionsVersion Date

ES1 June 1997

ES2 June 1998

ES3 December 1999

ES4 DOA 2006

ES5 December 2009

ES6/ES2015 June 2015

ES2016 2016

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/

Heroku

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)

Deploy to Heroku• heroku login

• heroku create <app-name>

• (must be unique)

• git push heroku master

• heroku open

MongoDB

Top DB Engines1. Oracle

2. MySQL

3. MS SQL Server

4. MongoDB

5. PostgreSQL

6. DB2

7. MS Access

8. Cassandra

9. Redis

10.SQLite

Who Uses It?• Craigslist

• eBay

• Foursquare

• SourceForge

• Viacom

• Expedia

• LinkedIn

• Medtronic

• eHarmony

• CERN

• and more

When to Use Mongo?• Document Database

• High Performance

• High Availability

• Easy Scalability

• Geospatial Data

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

Node.js

Node v7• Merged with the io.js project, which was at 3.x

• New version of Chrome V8

• Supports ES6

• Faster

• node -v

Node Package Manager

• Or npm for short

• version: npm -v

• upgrade npm: npm install npm -g

package.json• required properties (error if missing)

• name & version

• optional properties (warning if missing)

• description, repository, & license

• other properties

• scripts, dependencies, config, etc.

Using Environment Vars

• process.env object holds environment vars

• Reading: var dbConnect = process.env.dbConnect;

• Writing: process.env.mode = ‘test’;

Express

Installation• npm install express-generator -g

• express <app name>

• cd <app name>

• npm install

• npm start

Angular

Angular 2 main concepts• Component

• Data binding

• Service

• Directive

• Dependency injection

• Module

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

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

Componentimport {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(); } }

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

Data Binding

C/D Attribute Binding type

—> {{ value }} one-way

—> [property] = “value” property

<— (event) = “handler” event

<—> [(ng-model)] = “property” two-way

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

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

Directiveimport {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 + '%'); } }

Component + Directiveimport {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' } }

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

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

Links• https://www.mongodb.org/

• http://expressjs.com/

• https://angular.io/

• https://nodejs.org/

• http://mongoosejs.com/

• https://www.heroku.com/

Summary

• The MEAN Stack build web apps and APIs

• It is composed of four main components

• Allows development in JavaScript throughout