How to apply css class to a component element when it's created by router-outlet?

Question

I have DOM that looks something like this:

    
    ...

         


        

Answer 1

The key is /deep/ keyword:

    :host /deep/ router-outlet + project {
        display: block;
        border: 10px solid black;
    }

This works without any extra configurations.

:host /deep/ router-outlet + * for whatever component dynamically created by Angular Router.

Edited 2018/3/5:

Since Angular 4.3.0 made /deep/ deprecated, its suggested alternative is ::ng-deep. And there were a long discussion about this.