CSS is not working in my angular component

Question

I am trying to make a simple Angular4 web app that will show and X or O depending on what the rating is. I do not see the X or O in my web app.

The CSS classes in my rat

Answer 1

update

::slotted is now supported by all new browsers and can be used with `ViewEncapsulation.ShadowDom

https://developer.mozilla.org/en-US/docs/Web/CSS/::slotted

original

You need to add the CSS (['./app.component.css']) to RatingComponent, otherwise style encapsulation will prevent the CSS to be applied.

Alternatively, you can use ::ng-deep

::ng-deep .star.star-full-icon{
    content:'X';
}
::ng-deep .star.star-empty-icon{
    content:'O';
}

or ViewEncapsulation.None on the RatingComponent

but I'd suggest to stick with the first option.

See also https://blog.thoughtram.io/angular/2015/06/29/shadow

Answer 2

If you do not want to mess with ViewEncapsulation and still have the styles isolation, you can define the style within your global css file (e.g. styles.scss) by prefixing the component selector:

rating .star.star-full-icon{
    content:'X';
}

This was tested in an Angular 10 web application.

Answer 3

I believe the problem you’re having is because you’re declaring the styleUrls on the parent component and due to encapsulation they are not available in the child component. You have to move it to the rating component.

In case you want to keep it on the level you currently have you need to make the view encapsulation none on the rating component.

selector: 'rating',
encapsulation: ViewEncapsulation.None

I believe you also are misusing the content css property. You need to used either the ::before or ::after pseudo elements

.star.star-full-icon::after{
    content:'X';
}
.star.star-empty-icon::after{
    content:'O';
}