Из вашего вопроса:
mat-table
с несколькими столбцами и строками
- для одного из столбцов, каждая ячейка содержит список строк.
- Для нумерации элементов списка с использованием индекса, но счетчик продолжает увеличиваться в каждой последующей строке
- Вы хотели число, которое нужно перезапустить с 1 для каждой конкретной ячейки / столбца
релевантно HTML :
<table mat-table [dataSource]="dataSource" class="mat-elevation-z8">
<!--- Note that these columns can be defined in any order.
The actual rendered columns are set as a property on the row definition" -->
<ng-container matColumnDef="index">
<th mat-header-cell *matHeaderCellDef> No. </th>
<td mat-cell *matCellDef="let element; let j = index"> {{j+1}} </td>
</ng-container>
<!-- Position Column -->
<ng-container matColumnDef="position">
<th mat-header-cell *matHeaderCellDef> Position </th>
<td mat-cell *matCellDef="let element; let j = index">
<p *ngFor='let item of element.position;let i =index'>
{{i+1}} - {{item}}
</p>
</td>
</ng-container>
<!-- Name Column -->
<ng-container matColumnDef="name">
<th mat-header-cell *matHeaderCellDef> Name </th>
<td mat-cell *matCellDef="let element"> {{element.name}} </td>
</ng-container>
<!-- Weight Column -->
<ng-container matColumnDef="weight">
<th mat-header-cell *matHeaderCellDef> Weight </th>
<td mat-cell *matCellDef="let element"> {{element.weight}} </td>
</ng-container>
<!-- Symbol Column -->
<ng-container matColumnDef="symbol">
<th mat-header-cell *matHeaderCellDef> Symbol </th>
<td mat-cell *matCellDef="let element"> {{element.symbol}} </td>
</ng-container>
<tr mat-header-row *matHeaderRowDef="displayedColumns"></tr>
<tr mat-row *matRowDef="let row; columns: displayedColumns;"></tr>
</table>
релевантно TS :
import {Component} from '@angular/core';
export interface PeriodicElement {
name: string;
position: string[];
weight: number;
symbol: string;
}
const ELEMENT_DATA: PeriodicElement[] = [
{position: ['stuff 1', 'some stuff', 'some more stuff'] , name: 'Hydrogen', weight: 1.0079, symbol: 'H'},
{position: ['things 2', 'some things', 'some more things'], name: 'Helium', weight: 4.0026, symbol: 'He'},
{position: ['items 3', 'some items'], name: 'Lithium', weight: 6.941, symbol: 'Li'},
{position: ['stuff 4', 'some stuff' ], name: 'Beryllium', weight: 9.0122, symbol: 'Be'},
{position: ['stuff 5', 'some stuff', 'some more stuff'], name: 'Boron', weight: 10.811, symbol: 'B'},
{position: ['stuff 6', 'some stuff', 'some more stuff'], name: 'Carbon', weight: 12.0107, symbol: 'C'},
{position: ['stuff 7', 'some stuff', 'some more stuff'], name: 'Nitrogen', weight: 14.0067, symbol: 'N'},
{position: ['stuff 8', 'some stuff', 'some more stuff'], name: 'Oxygen', weight: 15.9994, symbol: 'O'},
{position: ['stuff 9', 'some stuff', 'some more stuff'], name: 'Fluorine', weight: 18.9984, symbol: 'F'},
{position: ['stuff 10', 'some stuff', 'some more stuff'], name: 'Neon', weight: 20.1797, symbol: 'Ne'},
];
/**
* @title Basic use of `<table mat-table>`
*/
@Component({
selector: 'table-basic-example',
styleUrls: ['table-basic-example.css'],
templateUrl: 'table-basic-example.html',
})
export class TableBasicExample {
displayedColumns: string[] = ['index', 'position', 'name', 'weight', 'symbol'];
dataSource = ELEMENT_DATA;
}
завершено здесь работает стекаблитц