I use it. Always starting with “/assets/” in CSS and HTML “assets/”. And I have no problems. Angular recognizes it.
CSS
.descriptionModal{
background-image: url("/assets/img/bg-compra.svg");
}
HTML
<img src="https://stackoverflow.com/questions/42802431/assets/img/ic-logoembajador-horizontal.svg" alt="logoEmbajador">