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learn-angular's Introduction

MyFirstApp

This project was generated with Angular CLI version 12.2.5.

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.

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 page.

My notes

Create a new project

ng new my-first-project

Generate a component

ng g c servers

Selector options

  • by element
  • by attribute
  • by class

String interpolation

Creates a binding to type script. Anything that returns a string or that can be converted into string.

Property binding

We can bind type script values into html properties. (Like the 'disabled' property of the html button)

Event binding

We can use 'any' type if the type script doesn't allow Event type to read value.

Two-way binding

With 2 way binding, when you update the value in TS it will update the UI, and vice versa. We are using Angular's directives.

Directives

The Directives are instructions in the DOM

Structural directives

It helps change the DOM structure. example ngIf

Attribute directives

They don't add/remove element. They only change the element they were placed on.

Another structural directive example

ngFor

Task 3

Keep an item toggling with button. Button adds a log item with Date. After the 5th item, the style changes.

Custom properties and events

This is used for passed data between components. Using the Input and Output decorators.

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