matrix-dimension/web/app/configs/widget/custom/custom.widget.component.html

<my-widget-config [widgetComponent]="this">
    <ng-template #widgetParamsTemplate let-widget="widget">
        <label class="label-block">
            Widget Name
            <input type="text" class="form-control"
                   placeholder="{{ defaultName }}"
                   [(ngModel)]="widget.dimension.newName" name="widget-name-{{widget.id}}"
                   [disabled]="isUpdating"/>
        </label>
        <label class="label-block">
            Widget URL
            <input type="text" class="form-control"
                   placeholder="https://matrix.org"
                   [(ngModel)]="widget.dimension.newUrl" name="widget-url-{{widget.id}}"
                   [disabled]="isUpdating"/>
        </label>
    </ng-template>
</my-widget-config>