Angular Basics I - Speaker Deck

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co-IT.eu GmbH Inspire To Change Gregor Woiwode @GregOnNet Angular Solid Foundations

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Values N G U L A R Apps that users ♥ to use Apps that developers to build Community where everyone feels welcome

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Values NGULAR Apps that users to use Apps that developers ♥ to build Community where everyone feels welcome Igor Minar Lead at project - Keynote at AngularConnect 2018, London

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Firebase Google Cloud Platform Google Express Google Analytics +600 more … @Google N G U L A R

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N G U L A R Clientside Rendering Serverside Rendering Mobile Native Mobile Embedded Flavours

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Think in small building blocks N G U L A R To g g le All Prepare Workshop Hold the Workshop ToDo App Title ToDo Un-/ Complete

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Group wisely N G U L A R T o g g le All Prepare Workshop Hold the Workshop ToDo App List Item

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Think in features N G U L A R T o g g le All Prepare Workshop Hold the Workshop ToDo App Header ToDos

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Components

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Purpose C O M P O N E N T S Prepare Workshop Representation & Interaction

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Purpose C O M P O N E N T S Representation

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Purpose C O M P O N E N T S Interaction

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HANDS ON Components in the wild

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Start Application ANGULAR CLI npm start -- --open Watch out! !

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Your Entry Point COMPONENTS app.component.(html,scss,ts,spec.ts) is the root of all good. !

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Auto Reload ANGULAR CLI

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Declaration COMPONENTS import { Component } from '@angular/core'; @Component({ selector: 'app-root', templateUrl: './app.component.html', styleUrls: ['./app.component.scss'] }) export class AppComponent { title = 'solid-foundations'; }

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Usage COMPONENTS index.html

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HANDS ON Enhance AppComponent

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Assign data COMPONENTS app.component.ts app.component.html @Component({ !" !!# }) export class AppComponent { title = 'solid-foundations'; todo = { text: 'Prepare 1st Workshop', isComplete: true }; } {{ todo.text }}

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Handle events COMPONENTS app.component.ts app.component.html @Component({ !" !!# }) export class AppComponent { !" !!# show(todo) { alert(todo); } } {{ todo.text }}

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Input Bindings COMPONENTS app.component.html {{ todo.text }} [property]="..." Let data flow into a child component

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Output Bindings COMPONENTS app.component.html !" !!# $ (event)="fn(...)" React to events of a child component

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Component Tree COMPONENTS AppComponent HTML Checkbox [checked] (changed) Parent Child

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HANDS ON Your First Own Component

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Generate Components ANGULAR CLI ng generate component path/component-name

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A ToDo Component ANGULAR CLI ng generate component todo

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COMPONENTS import { Component, OnInit } from '@angular/core'; @Component({ selector: 'app-todo', templateUrl: './todo.component.html', styleUrls: './todo.component.scss'] }) export class TodoComponent implments OnInit { // ... } Giving the todo a new home

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Bind data COMPONENTS todo.component.ts todo.component.html import { Input, !!" } from '@angular/core'; @Component({ !# !!" !$ }) export class ToDoComponent { !% @Input() todo; } {{ todo.text }}

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Usage COMPONENTS app.component.html !" !!# $ !&app-todo> [todo]="todo" Passing data to ToDoComponent

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Create custom an event COMPONENTS todo.component.ts todo.component.html import { EventEmitter, Output ... } from '@angular/core'; @Component({ /* ... */ }) export class ToDoComponent { // ... @Output() update = new EventEmitter(); } {{ todo.text }}

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Create custom an event COMPONENTS todo.component.ts todo.component.html @Component({ /* ... */ }) export class ToDoComponent { // ... @Output() update = new EventEmitter(); emitUpdate(todo) { this.update.emit(todo); } } {{ todo.text }}

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Usage COMPONENTS app.component.html !" !!# $ !&app-todo> (update)=“show($event)" React to update of TodoComponent ☝ speciﬁed by

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HANDS ON Handle Collections | *ngFor

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Reuse with *ngFor COMPONENTS app.component.ts app.component.html @Component({ !" !!# !$ }) export class AppComponent { title = 'solid-foundations'; todos = [{ text: 'Prepare 2nd Workshop', isComplete: false }, { text: Hold 2nd Workshop', isComplete: false }]; !& !!# }

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Recapitulation COMPONENTS is heavily used by Google Everything is a Component @Input lets data flow into a Component @Output creates custom events CLI automates your environment setup

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co-IT.eu GmbH Inspire To Change @GregOnNet Thank you for listening speakerdeck.com/gregonnet/angular-basics-i

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Sources CREDITS - ! Keynote AngularConnect 2018 by Igor Minar - Photos from Unsplash by - Dan Gold - Yoal Desurmont - angular.io