javascript - Angular2 : render a component without its wrapping tag

Question

I am struggling to find a way to do this. In a parent component, the template describes a table and its thead element, but delegates rendering the tbody to another component, like this:

<table>
  <thead>
    <tr>
      <th>Name</th>
      <th>Time</th>
    </tr>
  </thead>
  <tbody *ngFor="let entry of getEntries()">
    <my-result [entry]="entry"></my-result>
  </tbody>
</table>

Each myResult component renders its own tr tag, basically like so:

<tr>
  <td>{{ entry.name }}</td>
  <td>{{ entry.time }}</td>
</tr>

The reason I'm not putting this directly in the parent component (avoiding the need for a myResult component) is that the myResult component is actually more complicated than shown here, so I want to put its behaviour in a separate component and file.

The resulting DOM looks bad. I believe this is because it is invalid, as tbody can only contain tr elements (see MDN), but my generated (simplified) DOM is :

<table>
  <thead>
    <tr>
      <th>Name</th>
      <th>Time</th>
    </tr>
  </thead>
  <tbody>
    <my-result>
      <tr>
        <td>Bob</td>
        <td>128</td>
      </tr>
    </my-result>
  </tbody>
  <tbody>
    <my-result>
      <tr>
        <td>Lisa</td>
        <td>333</td>
      </tr>
    </my-result>
  </tbody>
</table>

Is there any way we can get the same thing rendered, but without the wrapping <my-result> tag, and while still using a component to be sole responsible for rendering a table row ?

I have looked at ng-content, DynamicComponentLoader, the ViewContainerRef, but they don't seem to provide a solution to this as far as I can see.

Answer 1

You can use attribute selectors

@Component({
  selector: '[myTd]'
  ...

})

and then use it like

<td myTd></td>