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Aligning content in columns & adding custom width with Angular

Philip Mutua
Software Engineer
・2 min read

To apply custom width to columns we can create helper classes with width provided in pixels as shown below.

.w-75{
    width: 75px;
}

.w-100{
    width: 100px;
}
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You can add any number of these custom width classes according to your requirements.

After that just add them to the <th> element in the the table you created.

<ng-container matcolumnDef="id">
  <th class="w-75" mat-header-cell *matHeaderCellDef> id </th>
  <td mat-cell *matCellDef="let element"> {{element.id}} </td>
<ng-container>
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How to Align Text in columns of data-table

In your CSS file just create classes as shown below:

.th-center{
  text-align: center;
}
.th-left{
  text-align: left;
}
.th-right{
  text-align: right;
}

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Which we can add to th elements.

  <ng-container matColumnDef="id">
    <th class="w-75 th-center" mat-header-cell *matHeaderCellDef> id </th>
    <td mat-cell *matCellDef="let element"> {{element.id}} </td>
  </ng-container>

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For Data-Tables using Component Elements as shown below:

<mat-table [dataSource]="dataList" class="mat-elevation-z8">

  <ng-container matColumnDef="id">
    <mat-header-cell *matHeaderCellDef [ngClass]="'w-75'"> id </mat-header-cell>
    <mat-cell *matCellDef="let element" [ngClass]="'w-75'"> {{element.id}} </mat-cell>
  </ng-container>

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

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

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

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

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

  <mat-header-row *matHeaderRowDef="displayedColumns"></mat-header-row>
  <mat-row *matRowDef="let row; columns: displayedColumns;"></mat-row>
</mat-table>

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We can use [ngClass] directive to add classes to Column and Cells but instead of width, we need to use max-width to columns as well as to cells because components use FLEX layout to define widths.

You can then update CSS classes to the following:


.w-75{
  max-width: 75px;
}

.w-100{
  max-width: 100px
}
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