How to use multiple ng-content in the same component in Angular 2?

问题

I would like to display different template in my component. Only one will show. If hasURL is true, I want to show the <a></a>. If hasURL is false, I want to show the <button></button>.

The problem if hasURL is false, the component show button, but the ng-content is empty. Because it's already read in the first "a></a>

Is there a way to solve that please?

        <a class="bouton" href="{{ href }}" *ngIf="hasURL">
            <ng-content>
            </ng-content>
        </a>

        <button class="bouton" *ngIf="!hasURL">
            <ng-content>
            </ng-content>    
        </button>

Thanks!

回答1:

You can wrap ng-content in ng-template and use ngTemplateOutlet

<a class="bouton" href="{{ href }}" *ngIf="hasURL">
    <ng-container *ngTemplateOutlet="contentTpl"></ng-container>
</a>

<button class="bouton" *ngIf="!hasURL">
    <ng-container *ngTemplateOutlet="contentTpl"></ng-container> 
</button>
<ng-template #contentTpl><ng-content></ng-content></ng-template>

Plunker Example

See also

• How to conditionally wrap a div around ng-content

来源：https://stackoverflow.com/questions/44699469/how-to-use-multiple-ng-content-in-the-same-component-in-angular-2