Angular + Material - How to add custom columns in a table (Mat-Table)

Question

How do you add a custom column in a mat table.

Such as adding an edit column containing an edit icon with a click event containing the id of the current element.

<div class="example-container mat-elevation-z8">   <mat-table #table [dataSource]="dataSource">      <!--- Note that these columns can be defined in any order.           The actual rendered columns are set as a property on the row definition" -->      <!-- Position Column -->     <ng-container matColumnDef="position">       <mat-header-cell *matHeaderCellDef> No. </mat-header-cell>       <mat-cell *matCellDef="let element"> {{element.position}} </mat-cell>     </ng-container>      <!-- Name Column -->     <ng-container matColumnDef="name">       <mat-header-cell *matHeaderCellDef> Name </mat-header-cell>       <mat-cell *matCellDef="let element"> {{element.name}} </mat-cell>     </ng-container>      <!-- Weight Column -->     <ng-container matColumnDef="weight">       <mat-header-cell *matHeaderCellDef> Weight </mat-header-cell>       <mat-cell *matCellDef="let element"> {{element.weight}} </mat-cell>     </ng-container>      <!-- Color Column -->     <ng-container matColumnDef="symbol">       <mat-header-cell *matHeaderCellDef> Symbol </mat-header-cell>       <mat-cell *matCellDef="let element"> {{element.symbol}} </mat-cell>     </ng-container>          <mat-header-row *matHeaderRowDef="displayedColumns"></mat-header-row>     <mat-row *matRowDef="let row; columns: displayedColumns;"></mat-row>   </mat-table> </div> 

Answer 1

On your TableBasicExample.ts add

export class TableBasicExample {   displayedColumns = ['position', 'name', 'weight', 'symbol', 'customColumn1'];   dataSource = new ExampleDataSource(); } 

And in your html file add the column:

<ng-container matColumnDef="customColumn1">   <mat-header-cell *matHeaderCellDef> Custom Title</mat-header-cell>   <mat-cell *matCellDef="let element"> {{element.position}} </mat-cell> </ng-container> 

Answer 2

Here is the one way to do it. It might help someone down the road.

table.html

    <ng-container matColumnDef="action">        <th mat-header-cell *matHeaderCellDef> Action </th>        <td mat-cell *matCellDef>            <ng-container *ngTemplateOutlet="templateRef"></ng-container>        </td>    </ng-container> 

table.component

 @Input() templateRef: TemplateRef<any>; 

table-parent.html

<app-data-table [dataSource]="dataSource" [templateRef]="template">    <ng-template #template>       <button mat-icon-button color="warn">          <mat-icon>delete</mat-icon>       </button>       <button mat-icon-button color="primary">          <mat-icon>edit</mat-icon>       </button>    </ng-template> </app-data-table> 

Hope that saves someone couple hours of search :)