Reorder mat-table rows with angular material’s drag-and-drop

The styling is done by CSS (look at the CSS tab on the example page). I tweaked it to work with mat-table:

.cdk-drag-preview {
  box-sizing: border-box;
  border-radius: 4px;
  box-shadow: 0 5px 5px -3px rgba(0, 0, 0, 0.2),
              0 8px 10px 1px rgba(0, 0, 0, 0.14),
              0 3px 14px 2px rgba(0, 0, 0, 0.12);
}

.cdk-drag-placeholder {
  opacity: 0;
}

.cdk-drag-animating {
  transition: transform 250ms cubic-bezier(0, 0, 0.2, 1);
}

.cdk-drop-list-dragging .mat-row:not(.cdk-drag-placeholder) {
  transition: transform 250ms cubic-bezier(0, 0, 0.2, 1);
}

I placed this in my main styles.scss file.

For anyone wondering how to implement drag and drop on a mat-table, you need to:

1. Add cdkDropList to mat-table
2. Add (cdkDropListDropped)="onListDrop($event)" to mat-table
3. Add cdkDrag to mat-row

onListDrop will look something like:

onListDrop(event: CdkDragDrop<string[]>) {
  // Swap the elements around
  moveItemInArray(this.myArray, event.previousIndex, event.currentIndex);
}

moveItemInArray is an Angular Material function. You can import it.