I would like to dynamically generate a class name for my element. For example,
`<span class=``icon icon-${route.title}``></span>` (had to use double backticks here, but it should really be just one set of backticks.)

```js
    <ul class="sidebar-list">
      <li *ngFor="let route of menuRoutes.items">
        <span class=`icon icon-${route.title}`></span>
        <a routerLink="/{{route.path}}" routerLinkActive="active">{{ 'menu.' + route.title | translate}}</a> 
      </li>
    </ul>
```