While the best way of reusing your code is creating a component, it's also possible to do it in a template.

To do this you can use ng-template along with *ngTemplateOutlet directive.

<p>
  <ng-container *ngTemplateOutlet="fancyGreeting"></ng-container>
</p>

<button>
  <ng-container *ngTemplateOutlet="fancyGreeting"></ng-container>    
</button>

<ng-template #fancyGreeting>
  Hello <b>{{name}}!</b>
</ng-template>

Links

• https://angular.io/api/common/NgTemplateOutlet
• https://angular.io/guide/structural-directives#the-ng-template