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132
docs/thebasic.md
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@ -80,3 +80,135 @@ Angular have multiple ways to select the component (CSS-Selectors):
What is Databinding? Communication between TS-Code (Businessloginc) and the Template (HTML).
<img src="../img/databinding.png" alt="databinding" width="650"/><br>
## String Interpolation
With Databinding can be used to dynamically load data into the HTML-template. For example like this:
```html
<p>{{ 'server' }} with ID {{ serverID }} is {{ serverStatus }}</p>
```
In the `{{ }}` can be executed an TS Expression wich can be a simple property like `serverID`, `serverStatus` or any **Method** which returns a **string**.
Note that a number can easily be converted into a string, so there is no need to explicitly convert it.
The `{{ 'server' }}` is just a string output.
**Useage:**<br>
To pront some text in the template use String interpolation.
## Property Binding
`[ ]` indicates that we want to use a property binding.
Exsample to activate a Button after 2seconds:
servers.component.html
```ts
<button
[disabled="!allowNewServer"]>Add Server</button>
```
servers.component.ts
```ts
export class ServerComponent implements OnInit {
allowNewServer = false;
constructor(){
setTimeout(() => {
this.allowNewServer = true;
}, 2000);
}
}
```
**Usage:**<br>
Change something dynamically upon an element use Property Binding.
```html
<p [innerText]="!allowNewServer"></p>
```
This syntax is recognized by angular. You cant mix with the curlybraces from the string interpolation. String interpolation is a TS feature.
## Event binding
**Syntax:**
```html
(event)="methodeToCall()"
```
**Example:**<br>
```html
<button
[disabled="!allowNewServer"]
(click)="onCreateServer()">Add Server</button>
<p>{{ serverCreationStatus }}</p>
```
## Passing and Using Data with Event binding
With the keyword `$event` we can extract lots of data from this object of type Event.
server.component.ts
```ts
...
onUpdateServerName(event: Event) {
this.serverName = (<HTMLImputElement>event.target).value;
}
...
```
server.component.html
```html
...
<input
type="text"
(input)="onUpdateServerName($event)">
<p>{{ serverName }}</p>
...
```
## Two-Way-Databinding
Important: For Two-Way-Binding to work, you need to enable the `ngModel` directive. This is done by adding the `FormsModule` to the `imports[]` array in the **AppModule**.
You then also need to add the import from @angular/forms in the app.module.ts file:
```ts
import { FormsModule } from '@angular/forms';
```
**Syntax:**
```html
[(ngModel)]=""
```
Updates the Input or Target based on eather one is changed.
## Directives
Directives are Instructions in the DOM.
<img src="../img/directives.png" alt="directives" width="400"/><br>
Angular Documentation of [Built-in directives](https://angular.io/guide/built-in-directives)
## ngIf
Built-In directive which binds the data based on a condition. This
## ngStyle
Changes a CSS style attribute
## ngClass
Adds or removes a CSS-Class from the element.
## ngFor
Adds an ammount of elements to the DOM.
```html
<app-server *ngFor="let server of servers"><(app-server)>
```

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17
my-first-app/.browserslistrc
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# This file is used by the build system to adjust CSS and JS output to support the specified browsers below.
# For additional information regarding the format and rule options, please see:
# https://github.com/browserslist/browserslist#queries
# For the full list of supported browsers by the Angular framework, please see:
# https://angular.io/guide/browser-support
# You can see what browsers were selected by your queries by running:
# npx browserslist
last 1 Chrome version
last 1 Firefox version
last 2 Edge major versions
last 2 Safari major versions
last 2 iOS major versions
Firefox ESR
not IE 11 # Angular supports IE 11 only as an opt-in. To opt-in, remove the 'not' prefix on this line.

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my-first-app/.editorconfig
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# Editor configuration, see https://editorconfig.org
root = true
[*]
charset = utf-8
indent_style = space
indent_size = 2
insert_final_newline = true
trim_trailing_whitespace = true
[*.ts]
quote_type = single
[*.md]
max_line_length = off
trim_trailing_whitespace = false

45
my-first-app/.gitignore vendored
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@ -1,45 +0,0 @@
# See http://help.github.com/ignore-files/ for more about ignoring files.
# compiled output
/dist
/tmp
/out-tsc
# Only exists if Bazel was run
/bazel-out
# dependencies
/node_modules
# profiling files
chrome-profiler-events*.json
# IDEs and editors
/.idea
.project
.classpath
.c9/
*.launch
.settings/
*.sublime-workspace
# IDE - VSCode
.vscode/*
!.vscode/settings.json
!.vscode/tasks.json
!.vscode/launch.json
!.vscode/extensions.json
.history/*
# misc
/.sass-cache
/connect.lock
/coverage
/libpeerconnection.log
npm-debug.log
yarn-error.log
testem.log
/typings
# System Files
.DS_Store
Thumbs.db

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my-first-app/README.md
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@ -1,27 +0,0 @@
# MyFirstApp
This project was generated with [Angular CLI](https://github.com/angular/angular-cli) version 12.2.7.
## Development server
Run `ng serve` for a dev server. Navigate to `http://localhost:4200/`. The app will automatically reload if you change any of the source files.
## Code scaffolding
Run `ng generate component component-name` to generate a new component. You can also use `ng generate directive|pipe|service|class|guard|interface|enum|module`.
## Build
Run `ng build` to build the project. The build artifacts will be stored in the `dist/` directory.
## Running unit tests
Run `ng test` to execute the unit tests via [Karma](https://karma-runner.github.io).
## Running end-to-end tests
Run `ng e2e` to execute the end-to-end tests via a platform of your choice. To use this command, you need to first add a package that implements end-to-end testing capabilities.
## Further help
To get more help on the Angular CLI use `ng help` or go check out the [Angular CLI Overview and Command Reference](https://angular.io/cli) page.

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my-first-app/angular.json
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{
"$schema": "./node_modules/@angular/cli/lib/config/schema.json",
"version": 1,
"newProjectRoot": "projects",
"projects": {
"my-first-app": {
"projectType": "application",
"schematics": {},
"root": "",
"sourceRoot": "src",
"prefix": "app",
"architect": {
"build": {
"builder": "@angular-devkit/build-angular:browser",
"options": {
"outputPath": "dist/my-first-app",
"index": "src/index.html",
"main": "src/main.ts",
"polyfills": "src/polyfills.ts",
"tsConfig": "tsconfig.app.json",
"assets": [
"src/favicon.ico",
"src/assets"
],
"styles": [
"src/styles.css"
],
"scripts": []
},
"configurations": {
"production": {
"budgets": [
{
"type": "initial",
"maximumWarning": "2mb",
"maximumError": "5mb"
},
{
"type": "anyComponentStyle",
"maximumWarning": "6kb",
"maximumError": "10kb"
}
],
"fileReplacements": [
{
"replace": "src/environments/environment.ts",
"with": "src/environments/environment.prod.ts"
}
],
"outputHashing": "all"
},
"development": {
"buildOptimizer": false,
"optimization": false,
"vendorChunk": true,
"extractLicenses": false,
"sourceMap": true,
"namedChunks": true
}
},
"defaultConfiguration": "production"
},
"serve": {
"builder": "@angular-devkit/build-angular:dev-server",
"configurations": {
"production": {
"browserTarget": "my-first-app:build:production"
},
"development": {
"browserTarget": "my-first-app:build:development"
}
},
"defaultConfiguration": "development"
},
"extract-i18n": {
"builder": "@angular-devkit/build-angular:extract-i18n",
"options": {
"browserTarget": "my-first-app:build"
}
},
"test": {
"builder": "@angular-devkit/build-angular:karma",
"options": {
"main": "src/test.ts",
"polyfills": "src/polyfills.ts",
"tsConfig": "tsconfig.spec.json",
"karmaConfig": "karma.conf.js",
"assets": [
"src/favicon.ico",
"src/assets"
],
"styles": [
"src/styles.css"
],
"scripts": []
}
}
}
}
},
"defaultProject": "my-first-app"
}

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my-first-app/karma.conf.js
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@ -1,44 +0,0 @@
// Karma configuration file, see link for more information
// https://karma-runner.github.io/1.0/config/configuration-file.html
module.exports = function (config) {
config.set({
basePath: '',
frameworks: ['jasmine', '@angular-devkit/build-angular'],
plugins: [
require('karma-jasmine'),
require('karma-chrome-launcher'),
require('karma-jasmine-html-reporter'),
require('karma-coverage'),
require('@angular-devkit/build-angular/plugins/karma')
],
client: {
jasmine: {
// you can add configuration options for Jasmine here
// the possible options are listed at https://jasmine.github.io/api/edge/Configuration.html
// for example, you can disable the random execution with `random: false`
// or set a specific seed with `seed: 4321`
},
clearContext: false // leave Jasmine Spec Runner output visible in browser
},
jasmineHtmlReporter: {
suppressAll: true // removes the duplicated traces
},
coverageReporter: {
dir: require('path').join(__dirname, './coverage/my-first-app'),
subdir: '.',
reporters: [
{ type: 'html' },
{ type: 'text-summary' }
]
},
reporters: ['progress', 'kjhtml'],
port: 9876,
colors: true,
logLevel: config.LOG_INFO,
autoWatch: true,
browsers: ['Chrome'],
singleRun: false,
restartOnFileChange: true
});
};

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my-first-app/package.json
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{
"name": "my-first-app",
"version": "0.0.0",
"scripts": {
"ng": "ng",
"start": "ng serve",
"build": "ng build",
"watch": "ng build --watch --configuration development",
"test": "ng test"
},
"private": true,
"dependencies": {
"@angular/animations": "~12.2.0",
"@angular/common": "~12.2.0",
"@angular/compiler": "~12.2.0",
"@angular/core": "~12.2.0",
"@angular/forms": "~12.2.0",
"@angular/platform-browser": "~12.2.0",
"@angular/platform-browser-dynamic": "~12.2.0",
"@angular/router": "~12.2.0",
"rxjs": "~6.6.0",
"tslib": "^2.3.0",
"zone.js": "~0.11.4"
},
"devDependencies": {
"@angular-devkit/build-angular": "~12.2.7",
"@angular/cli": "~12.2.7",
"@angular/compiler-cli": "~12.2.0",
"@types/jasmine": "~3.8.0",
"@types/node": "^12.11.1",
"jasmine-core": "~3.8.0",
"karma": "~6.3.0",
"karma-chrome-launcher": "~3.1.0",
"karma-coverage": "~2.0.3",
"karma-jasmine": "~4.0.0",
"karma-jasmine-html-reporter": "~1.7.0",
"typescript": "~4.3.5"
}
}

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my-first-app/src/app/app.component.css
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my-first-app/src/app/app.component.html
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<app-servers></app-servers>

31
my-first-app/src/app/app.component.spec.ts
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import { TestBed } from '@angular/core/testing';
import { AppComponent } from './app.component';
describe('AppComponent', () => {
beforeEach(async () => {
await TestBed.configureTestingModule({
declarations: [
AppComponent
],
}).compileComponents();
});
it('should create the app', () => {
const fixture = TestBed.createComponent(AppComponent);
const app = fixture.componentInstance;
expect(app).toBeTruthy();
});
it(`should have as title 'my-first-app'`, () => {
const fixture = TestBed.createComponent(AppComponent);
const app = fixture.componentInstance;
expect(app.title).toEqual('my-first-app');
});
it('should render title', () => {
const fixture = TestBed.createComponent(AppComponent);
fixture.detectChanges();
const compiled = fixture.nativeElement as HTMLElement;
expect(compiled.querySelector('.content span')?.textContent).toContain('my-first-app app is running!');
});
});

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my-first-app/src/app/app.component.ts
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import { Component } from '@angular/core';
@Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css']
})
export class AppComponent {
}

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my-first-app/src/app/app.module.ts
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import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { ServerComponent } from './server/server.component';
import { ServersComponent } from './servers/servers.component';
@NgModule({
declarations: [
AppComponent,
ServerComponent,
ServersComponent
],
imports: [
BrowserModule
],
providers: [],
bootstrap: [AppComponent]
})
export class AppModule { }

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my-first-app/src/app/server/server.component.html
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<p>Server Component</p>

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my-first-app/src/app/server/server.component.ts
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import { Component } from '@angular/core';
@Component({
selector: 'app-server',
templateUrl: './server.component.html'
})
export class ServerComponent {
}

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my-first-app/src/app/servers/servers.component.css
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my-first-app/src/app/servers/servers.component.html
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<p>servers works!</p>
<app-server></app-server>
<app-server></app-server>

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my-first-app/src/app/servers/servers.component.ts
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import { Component, OnInit } from '@angular/core';
@Component({
selector: 'app-servers',
templateUrl: './servers.component.html',
styleUrls: ['./servers.component.css']
})
export class ServersComponent implements OnInit {
constructor() { }
ngOnInit(): void {
}
}

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my-first-app/src/assets/.gitkeep
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my-first-app/src/environments/environment.prod.ts
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export const environment = {
production: true
};

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my-first-app/src/environments/environment.ts
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// This file can be replaced during build by using the `fileReplacements` array.
// `ng build` replaces `environment.ts` with `environment.prod.ts`.
// The list of file replacements can be found in `angular.json`.
export const environment = {
production: false
};
/*
* For easier debugging in development mode, you can import the following file
* to ignore zone related error stack frames such as `zone.run`, `zoneDelegate.invokeTask`.
*
* This import should be commented out in production mode because it will have a negative impact
* on performance if an error is thrown.
*/
// import 'zone.js/plugins/zone-error'; // Included with Angular CLI.

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my-first-app/src/index.html
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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>MyFirstApp</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>

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my-first-app/src/main.ts
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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));

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my-first-app/src/polyfills.ts
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/**
* This file includes polyfills needed by Angular and is loaded before the app.
* You can add your own extra polyfills to this file.
*
* This file is divided into 2 sections:
* 1. Browser polyfills. These are applied before loading ZoneJS and are sorted by browsers.
* 2. Application imports. Files imported after ZoneJS that should be loaded before your main
* file.
*
* The current setup is for so-called "evergreen" browsers; the last versions of browsers that
* automatically update themselves. This includes Safari >= 10, Chrome >= 55 (including Opera),
* Edge >= 13 on the desktop, and iOS 10 and Chrome on mobile.
*
* Learn more in https://angular.io/guide/browser-support
*/
/***************************************************************************************************
* BROWSER POLYFILLS
*/
/**
* IE11 requires the following for NgClass support on SVG elements
*/
// import 'classlist.js'; // Run `npm install --save classlist.js`.
/**
* Web Animations `@angular/platform-browser/animations`
* Only required if AnimationBuilder is used within the application and using IE/Edge or Safari.
* Standard animation support in Angular DOES NOT require any polyfills (as of Angular 6.0).
*/
// import 'web-animations-js'; // Run `npm install --save web-animations-js`.
/**
* By default, zone.js will patch all possible macroTask and DomEvents
* user can disable parts of macroTask/DomEvents patch by setting following flags
* because those flags need to be set before `zone.js` being loaded, and webpack
* will put import in the top of bundle, so user need to create a separate file
* in this directory (for example: zone-flags.ts), and put the following flags
* into that file, and then add the following code before importing zone.js.
* import './zone-flags';
*
* The flags allowed in zone-flags.ts are listed here.
*
* The following flags will work for all browsers.
*
* (window as any).__Zone_disable_requestAnimationFrame = true; // disable patch requestAnimationFrame
* (window as any).__Zone_disable_on_property = true; // disable patch onProperty such as onclick
* (window as any).__zone_symbol__UNPATCHED_EVENTS = ['scroll', 'mousemove']; // disable patch specified eventNames
*
* in IE/Edge developer tools, the addEventListener will also be wrapped by zone.js
* with the following flag, it will bypass `zone.js` patch for IE/Edge
*
* (window as any).__Zone_enable_cross_context_check = true;
*
*/
/***************************************************************************************************
* Zone JS is required by default for Angular itself.
*/
import 'zone.js'; // Included with Angular CLI.
/***************************************************************************************************
* APPLICATION IMPORTS
*/

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my-first-app/src/styles.css
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/* You can add global styles to this file, and also import other style files */

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my-first-app/src/test.ts
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// This file is required by karma.conf.js and loads recursively all the .spec and framework files
import 'zone.js/testing';
import { getTestBed } from '@angular/core/testing';
import {
BrowserDynamicTestingModule,
platformBrowserDynamicTesting
} from '@angular/platform-browser-dynamic/testing';
declare const require: {
context(path: string, deep?: boolean, filter?: RegExp): {
keys(): string[];
<T>(id: string): T;
};
};
// First, initialize the Angular testing environment.
getTestBed().initTestEnvironment(
BrowserDynamicTestingModule,
platformBrowserDynamicTesting(),
{ teardown: { destroyAfterEach: true }},
);
// Then we find all the tests.
const context = require.context('./', true, /\.spec\.ts$/);
// And load the modules.
context.keys().map(context);

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my-first-app/tsconfig.app.json
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/* To learn more about this file see: https://angular.io/config/tsconfig. */
{
"extends": "./tsconfig.json",
"compilerOptions": {
"outDir": "./out-tsc/app",
"types": []
},
"files": [
"src/main.ts",
"src/polyfills.ts"
],
"include": [
"src/**/*.d.ts"
]
}

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my-first-app/tsconfig.json
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/* To learn more about this file see: https://angular.io/config/tsconfig. */
{
"compileOnSave": false,
"compilerOptions": {
"baseUrl": "./",
"outDir": "./dist/out-tsc",
"sourceMap": true,
"declaration": false,
"downlevelIteration": true,
"experimentalDecorators": true,
"moduleResolution": "node",
"importHelpers": true,
"target": "es2017",
"module": "es2020",
"lib": [
"es2018",
"dom"
]
},
"angularCompilerOptions": {
"enableI18nLegacyMessageIdFormat": false
}
}

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my-first-app/tsconfig.spec.json
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/* To learn more about this file see: https://angular.io/config/tsconfig. */
{
"extends": "./tsconfig.json",
"compilerOptions": {
"outDir": "./out-tsc/spec",
"types": [
"jasmine"
]
},
"files": [
"src/test.ts",
"src/polyfills.ts"
],
"include": [
"src/**/*.spec.ts",
"src/**/*.d.ts"
]
}