Get started with Angular 8

Angular Raleigh Meetup

Hey, Am Udhay (OO-dhy)

Angular 1.X?

Called as Angular JS..

JavaScript based framework

Not object oriented or typed because of lack of Typescript support

No new versions released since 2018

Entered LTS (Long Term Support) phase till July 1, 2021

Angular JS is dead!

Don't worry, we have better framework now..

Google team developed new framework called Angular!

Just note that it's not redeveloped from Angular JS

Why Angular?

One framework for Mobile & Desktop

Uses TypeScript (Typed JavaScript)

Blazing speed &

Performance

Incredible tooling

Loved by millions!

Open source

Extensible

Single Page App development - Made easy

Angular 2 is the first version of new Angular framework, not the next version of Angular JS 1.X

Angular 2

Angular 3

Angular 4

Angular 5

Angular 6

Angular 7

Angular 8 (Current)

Angular 9-rc

One of the repo @angular/router was already versioned 3.X in Angular 2.X, that's why version 3 was skipped.

Let's talk about softwares..

Click through logos and install them..

Hope things run smoothly..

Check if Node installed fine by running       

command from terminal/cmd prompt

node -v

Need to install Angular CLI to create, serve, package etc

Angular application..

npm install -g @angular/cli

Check if Angular installed perfectly by running       

command from terminal/cmd prompt

ng v

Create your first Angular app using ng cli.. 

ng new HelloWorld

It's time to run your first Angular app..

ng serve -o

Serves and opens the app in default

browser..

}

Application source

App component

Configuration files

Bootstrap files

}

Node modules

Angular App

Structure

How Angular app works?

 "build": {
          "builder": "@angular-devkit/build-angular:browser",
          "options": {
            "outputPath": "dist/HelloWorld",
            "index": "src/index.html",
            "main": "src/main.ts",
            "polyfills": "src/polyfills.ts",
            "tsConfig": "tsconfig.app.json",
            "aot": false,
            "assets": [
              "src/favicon.ico",
              "src/assets"
            ],
            "styles": [
              "src/styles.css"
            ],
            "scripts": []
          },

angular.json

main.ts

app.module.ts

app.component.ts

app.component.html

index.html

ng serve command builds the app with entry point as specified in build object in angular.json

import { enableProdMode } from '@angular/core';
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';

import { AppModule } from './app/app.module';
import { environment } from './environments/environment';

if (environment.production) {
  enableProdMode();
}

platformBrowserDynamic().bootstrapModule(AppModule).catch(err => console.error(err));

angular.json

main.ts

app.module.ts

app.component.ts

app.component.html

index.html

Angular bootstraps the root module - AppModule

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';

import { AppComponent } from './app.component';

@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    BrowserModule
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }

angular.json

main.ts

app.module.ts

app.component.ts

app.component.html

index.html

AppModule bootstraps the AppComponent to render the HTML

import { Component } from '@angular/core';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent {
  title = 'HelloWorld';
}

angular.json

main.ts

app.module.ts

app.component.ts

app.component.html

index.html

It renders the html tied with app-root selector

Welcome to {{title}}!

angular.json

main.ts

app.module.ts

app.component.ts

app.component.html

index.html

It renders the html tied with app-root selector

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>HelloWorld</title>
  <base href="/">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="icon" type="image/x-icon" href="favicon.ico">
</head>
<body>
  <app-root></app-root>
</body>
</html>

angular.json

main.ts

app.module.ts

app.component.ts

app.component.html

index.html

Injects the app-root html in index.html

Angular Architecture

* Module

* Component

* Service

* Pipes

Angular Architecture

Angular Architecture

* Open app.component.html from the angular app your created before.

* Replace existing html code with below:

 

 

 

* title is Typescript property exists in app.component.ts, that gets rendered with its value, when you put them within {{ }}.

* This is called String interpolation.

Welcome to {{title}}

* If you are app is already running, you should be seeing "Welcome to HelloWorld" on your browser.. That's the magic of Angular dev server, that looks for file changes.

* Once the files are changes and saved, Angular builds and renders the app on brwoser.

 

 

ng serve -o

Tada..

Questions?

What next?

Learn other interesting topics in Angular:

 

Displaying data - https://angular.io/guide/template-syntax

Pipes - https://angular.io/guide/pipes

Forms - https://angular.io/guide/forms-overview

HttpClient - https://angular.io/guide/http

Routing & Navigation - https://angular.io/guide/router

ng thanks!

Hope the session was helpful to you to get started with Angular.

Get started with Angular 8

By Udhayakumar G

Get started with Angular 8

This presentation talks about: What is Angular?, Angular installation, Angular Architecture and A simple helloworld angular app. Feel free to share your comments. Happy learning. Thanks!

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