小编loc*_*zek的帖子

我有问题，因为我不知道如何在有人选择日期后触发更改事件。

我当前的代码：

<div class="d-flex align-items-center">\n    <mat-form-field appearance="fill">\n      <mat-label>Wybierz przedzia\xc5\x82 czasowy\n      </mat-label>\n      <mat-date-range-input [formGroup]="range" [rangePicker]="picker">\n        <input matStartDate formControlName="start" placeholder="Data pocz\xc4\x85tkowa">\n        <input matEndDate formControlName="end" placeholder="Data ko\xc5\x84cowa">\n      </mat-date-range-input>\n      <mat-datepicker-toggle matSuffix [for]=" picker"></mat-datepicker-toggle>\n      <mat-date-range-picker #picker></mat-date-range-picker>\n\n      <mat-error *ngIf="range.controls.start.hasError('matStartDateInvalid')">Z\xc5\x82a data pocz\xc4\x85tkowa</mat-error>\n      <mat-error *ngIf="range.controls.end.hasError('matEndDateInvalid')">Z\xc5\x82a data ko\xc5\x84cowa</mat-error>\n    </mat-form-field>\n  </div>\n