How to groupBy rows in Mat-Table - html

Question

I have mat-Table with filters and i want to group the table by one of the columns.
I want to make it a collapsible row that just shows how much you have of "that" kind and you can press it to see every single row inside that group.
I will share my HTML(that's a snippet not the whole HTML :
<mat-checkbox class="CheckBoxClass" value="clientType" [(ngModel)]="isChecked " disabled (change)="updateFilter('LQOCH_SHM_LOEZI_QTSR', clientType)" >{{clientType}}</mat-checkbox>
<br><br>
<mat-checkbox class="CheckBoxClass" value="contSize" [(ngModel)]="isChecked" disabled (change)="updateFilter('AORKH_MCOLH', contSize)" >{{contSize}}</mat-checkbox>
<br><br>
<mat-checkbox class="CheckBoxClass" value="storageType" [(ngModel)]="isChecked" disabled (change)="updateFilter('TAOR_QTSR_EBRI', storageType)" >{{storageType}}</mat-checkbox>
</div>
<!-- Container Table -->
<div>
<mat-table [dataSource]="dataSource" [hidden]="!show" >
<!-- Location -->
<ng-container matColumnDef="AITOR">
<mat-header-cell *matHeaderCellDef> Location
</mat-header-cell>
<mat-cell *matCellDef="let container"> {{container.AITOR}} </mat-cell>
</ng-container>
<!-- Type -->
<ng-container matColumnDef="SOG_MCOLH">
<mat-header-cell *matHeaderCellDef > Container Type</mat-header-cell>
<mat-cell *matCellDef="let container"> {{container.SOG_MCOLH}}</mat-cell>
This is my component NgOnInit :
ngOnInit() {
this.marinService.getAllContainers().subscribe((result) => {
//Data
this.dataSource = new MatTableDataSource(result);
//Paginator
this.dataSource.paginator = this.paginator;
this.dataSource.filterPredicate = ((data: Container, filter: string): boolean => {
const filterValues = JSON.parse(filter);
let conditions = true;
for (let filterKey in filterValues) {
if (filterKey === 'SOG_MCOLH' || filterKey === 'LQOCH_SHM_LOEZI_QTSR' || filterKey === 'AORKH_MCOLH' || filterKey === 'TAOR_QTSR_EBRI') {
conditions = conditions && data[filterKey].trim().toLowerCase().indexOf(filterValues[filterKey]) !== -1;
}
else if (filterValues[filterKey].length) {
conditions = conditions && filterValues[filterKey].includes(data[filterKey].trim().toLowerCase());
}
}
return conditions;
});
}
)}
Basically what I want to achieve is a row that collapse and shows how many rows it has and you can press on it to open the rows.

Answer 1

This doesn't come out of the box with angular Material. There are some solutions to do it yourself.
Here is another SO post that gives some directions: Angular Material mat-table Row Grouping
The second StackBlitz link provided there gives a good example of a table using grouped row.
You can also have a look at other libraries that include row grouping by default, if that's something your project allows.