Angular를 활용한 웹 프론트단 개발과 2.0에서 달라진점

Angular를 활용한 웹 프론트단 개발과
2.0에서 달라진점
고재도
W3C HTML5 Conference 2015

+jeado.ko
haibane84@gmail.com
- “Bitfinder.co” Software Engineer
- “kt” IoT Platform Researcher
- “http://webframeworks.kr” AngularJS Tutorial Contributor
- “Google Developer Group Korea WebTech” Organizer
- “시작하세요 AngularJS wikibooks” Author

Change of Web Frontend
Library Feature-Complete
Framework
MVC
Framework
Component

<ng-search-icon>
<ng-paper-fab>
<ng-drawer-panel>
<ng-field>

Component
= Building block (LEGO)
= a group of HTML elements

Component is made of two
main parts
- View
- Logic

Components View
<section>
<h4>{{ profile.name }}</h4>
<p> Age - {{ profile.age }}</p>
<button ng-click="save()">Save</button>
</section>
<profile-card profile="profile"></profile-card>
Reusable group of element

Component Logic
A Object/Function - A place to store properties and functions
function ProfileCardCtrl(){
this.profile = new Profile({ name : 'jay' });
this.save = function(){
// ...
}
}

So How ?
React Component
class HeloMessage extends React.Component {
render() {
return <div>Hello {this.props.name}</div>;
}
}
React.render(<HelloMessage name="Jay" />,
mountNode);
Ember Component
App.AppProfileComponent = Ember.Component.extend({
actions: {
hello: function(name) {
console.log("Hello", name);
}
}
});

<h1>{{person.title}}</h1>
<img src={{person.avatar}}>
<p class='signature'>{{person.signature}}</p>
{{app-profile person=currentUser}}
Polymer Component
//////// porot-element.html ////////
<link rel="import"
href="bower_components/polymer/polymer.html">
<script>
Polymer({
is: "proto-element",
ready: function() {
this.textContent = "I'm a proto-element."
}
});
</script>
//////// index.html ////////
</head>
<link rel="import" href="proto-element.html">
</head>
<body>
<proto-element></proto-element>
</body>

Angular Connect, London, October 2015
Angular 2.0

Angular Connect, London, October 2015
2.0.0-alpha.48 (2015-12-05)

My First Component
import {bootstrap, Component} from 'angular2/angular2';
@Component({
selector: 'my-app',
template: '<h1>My First Angular 2 App</h1>'
})
class AppComponent { }
bootstrap(AppComponent);
//index.html
<my-app>loading...</my-app>

Component
Template
Directive
Controller Component
ng1 ng2

Typescript
• Open Source project from Microsoft Technologies.
• An attempt to 'fix' the missing parts of JavaScript.
• A Superset of JavaScript => JavaScript + Static Types
(and Classes and Modules and more…).
• It uses ES6 syntax with Type Annotation and compiles to
plain JavaScript (target: ES3, ES5, ES6).
• Any valid JavaScript application is also a TypeScript
application

Typescript
tsc app.tsapp.ts app.js
TSC - the TypeScript compiler
TSD - TypeScript Definition Files package manager
TypeScript Definition File (ambient declaration file)
• .d.ts extension.
• Allows the definition of strong types.
• Provide type definition for external JavaScript libraries.
DefinitelyTyped (http://definitelytyped.org/): a community driven project on GitHub that tracks all of them.

Typescript
class Greeter {
greeting: string;
constructor(message: string) {
this.greeting = message;
}
greet() {
return "Hello, " + this.greeting;
}
}
var greeter = new Greeter("world");
var button = document.createElement('button');
button.textContent = "Say Hello";
button.onclick = function() {
alert(greeter.greet());
}
document.body.appendChild(button);
Type Annotation

Typescript
import {bootstrap, Component} from 'angular2/angular2';
@Component({
selector: 'my-app',
})
class AppComponent { }
Meta Annotation

Language Support
ES5 ES6 TypeScript Dart

Language Support
CompileNo Compile

Language Support
TypesNo Types

Language Support
TypeScriptES6 Dart
No JS
TypeScriptES6
JavaScript-Based Syntax
ES5

Re-rendering Script Times on Changes

Tour of Heroes (before Dashboard)

SystemJS Loader : index.js
<html>
<head>
<title>Tour of Heroes</title>
<script src="../node_modules/systemjs/dist/system.src.js"></script>
<script src="../node_modules/angular2/bundles/angular2.dev.js"></script>
<script>
System.config({
packages: {'app': {defaultExtension: 'js'}}
});
System.import('app/app');
</script>
</head>
<body>
<my-app>loading...</my-app>
</body>
</html>

SystemJS Loader
angular2.js bundle (System.register)
Angular2
RxJS
Reflect.js
Zone.js
Application code
SystemJS loader

Define Hero Type - app.ts
class Hero {
id: number;
name: string;
}

Add few heroes - app.ts
var HEROES: Hero[] = [
{ "id": 11, "name": "Mr. Nice" },
{ "id": 12, "name": "Narco" },
{ "id": 13, "name": "Bombasto" },
{ "id": 14, "name": "Celeritas" },
{ "id": 15, "name": "Magneta" },
{ "id": 16, "name": "RubberMan" },
{ "id": 17, "name": "Dynama" },
{ "id": 18, "name": "Dr IQ" },
{ "id": 19, "name": "Magma" },
{ "id": 20, "name": "Tornado" }
];

ES6 Module load - app.ts
import {Component, bootstrap, NgFor} from 'angular2/angular2';
angular.module('app',[ ‘ng’, ‘.....’ ])
angular 1.x

Define AppComponet Using ES6 Class - app.ts
class AppComponent {
public title = 'Tour of Heroes';
public heroes = HEROES;
}

@component
@Component({
selector: 'my-app',
})
}

@Component({
selector: 'my-app',
template:`
<h1>{{title}}</h1>
<h2>My Heroes</h2>
<ul class="heroes">
<template ng-for #hero [ng-for-of]="heroes">
<li><span class="badge">{{hero.id}}</span> {{hero.name}}</li>
</template>
</ul>
`,
directives: [NgFor]
})
}
template

@Component({
selector: 'my-app',
template:`
<h1>{{title}}</h1>
<h2>My Heroes</h2>
<ul class="heroes">
<li *ng-for="#hero of heroes" (click)="onSelect(hero)">
<span class="badge">{{hero.id}}</span> {{hero.name}}
</li>
</ul>
`,
directives: [NgFor]
})
}
template

Bootstrap

Add Encapsulation Style to Component
@Component({
selector: 'my-app',
template:`
...
`,
styles:[`
.heroes {list-style-type: none; margin-left: 1em; padding: 0; width: 10em;}
.heroes li { cursor: pointer; position: relative; left: 0; transition: all 0.2s ease; }
.heroes li:hover {color: #369; background-color: #EEE; left: .2em;}
.heroes .badge {
font-size: small;
color: white;
padding: 0.1em 0.7em;
background-color: #369;
line-height: 1em;
position: relative;
left: -1px;
top: -1px;
}
.selected { background-color: #EEE; color: #369; }
`],
directives: [NgFor]
})
}

Three way to add style
● Component inline styles
● Styles urls
● Template inline styles

Add Style to Component - Styles urls
@Component({
selector: 'my-app',
template:`
<h1>{{title}}</h1>
<h2>My Heroes</h2>
<ul class="heroes">
<li *ng-for="#hero of heroes">
</li>
</ul>
`,
styleUrls : ['app.css'],
directives: [NgFor]
})
}

Add Style to Component - Template inline styles
@Component({
selector: 'my-app',
template:`
<style>
.heroes {list-style-type: none; margin-left: 1em; padding: 0; width: 10em;}
.heroes li { cursor: pointer; position: relative; left: 0; transition: all 0.2s ease; }
.heroes li:hover {color: #369; background-color: #EEE; left: .2em;}
.heroes .badge {
font-size: small;
color: white;
padding: 0.1em 0.7em;
background-color: #369;
line-height: 1em;
position: relative;
left: -1px;
top: -1px;
}
.selected { background-color: #EEE; color: #369;
</style>
….
`,
directives: [NgFor]
})

Using Shadow Dom
import {Component, bootstrap, NgFor, ViewEncapsulation} from 'angular2/angular2';
@Component({
selector: 'my-app',
template:`
<h1>{{title}}</h1>
<h2>My Heroes</h2>
<ul class="heroes">
</li>
</ul>
`,
styles:[`
….
`],
directives: [NgFor],
encapsulation : ViewEncapsulation.Native
})

Add event binding
<h1>{{title}}</h1>
<h2>My Heroes</h2>
<ul class="heroes">
</li>
</ul>
public selectedHero: Hero;
onSelect(hero: Hero) { this.selectedHero = hero; }
}

Two-way Data binding
<div *ng-if="selectedHero">
<h2>{{selectedHero.name}} details!</h2>
<div><label>id: </label>{{selectedHero.id}}</div>
<div>
<label>name: </label>
<input [(ng-model)]="selectedHero.name" placeholder="name"></input>
</div>
</div>

ng-class
<li *ng-for="#hero of heroes" [ng-class]="getSelectedClass(hero)" (click)="onSelect(hero)">
</li>
public selectedHero: Hero;
onSelect(hero: Hero) { this.selectedHero = hero; }
getSelectedClass(hero: Hero) {
return { 'selected': hero === this.selectedHero };
}
}

References
- https://angular.io/
- AngularConnect Keynote 2015
- ngVegas The Angular 2 Glossary
- TRY Angular 2
- View Encapsulation in Angular 2
- http://info.meteor.com/blog/comparing-performance-of-blaze-react-angular-
meteor-and-angular-2-with-meteor

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