Creating custom CSS styles for Angular 2 components with view encapsulation using the styleUrl property

I recently started working on a hello world application after migrating from obsolete Angular 1. I utilized angular-cli to create my components and it automatically generated a stylesheet which was linked in my component via styleUrls. However, I noticed that none of my styles were being applied as expected unless I used "viewEncapsulation.none." Am I overlooking something here? Is there a more effective way to handle CSS for this?

Whenever I try to use the default encapsulation (ViewEncapsulation.Emulated or native), my styles simply do not appear at all.

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

@Component({
  selector: 'app-header',
  templateUrl: './header.component.html',
  encapsulation: ViewEncapsulation.None,
  styleUrls: ['./header.component.css']
})
export class HeaderComponent implements OnInit {

constructor() { }

ngOnInit() {
}
}

This is what my CSS currently looks like:

.app-header{
    display: block;
    opacity:0.2;
}

Answer №1

To apply the desired styling, make sure to utilize the following css code:

:host() {
    display: block;
    opacity:0.2;
}

Answer №2

It is important not to alter the component tag itself, as this tag's scope is owned by the parent component that utilizes it. Instead, focus on manipulating only the tags within your HTML template component.

Answer №3

Ensure that you have set module:module.id in the component declaration to help Angular locate the file correctly. Double check if the CSS is being loaded in the scenario where it's not working.

If you are using the app-header css in header.component.html, try implementing the following code:

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

@Component({
  module: module.id,
  selector: 'app-header',
  templateUrl: './header.component.html',
  styleUrls: ['./header.component.css']
})
export class HeaderComponent implements OnInit {

  constructor() { }

  ngOnInit() { }
}

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