Angular Components

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Angular components are the main building blocks of Angular apps. It is what you “see” in the browser. A component is made up of…

  • A Class (usually TypeScript)
  • An HTML file (view)
  • A CSS file (optional)

In Angular, a component is a type of directive that has its own template.

Component Creation

You can use the Angular CLI to create a component…

// ComponentName can be whatever you want to call your component
ng g component ComponentName

While not the only structure of a component, it will generate the following component TypeScript code as it is the most used configuration…

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

  selector: 'app-ComponentName',
  tempateUrl: './componentname.component.html',
  styleUrls: ['./componentnanme.component.css']
export class ComponentNameComponent implements OnInit {
  constructor() {}

  ngOnInit() { }

A component class is decorated with the @component decorator. Angular uses four steps to create a component…

  • Create class with all data and logic…export it
  • Decorate class with metadata (@component)
  • Import libraries and modules
  • Create template (HTML) and styles (CSS)

Once you have an NgModule, you create a main app component and you are well on your way creating Angular apps!

Happy Coding!

Clay Hess

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