角度材质日期选择器如何将月份标签从格式MMM设置为格式MMMM (long)

<mat-datepicker [format]="'MMMM'"></mat-datepicker>

import { MatDateFormats, MAT_DATE_FORMATS } from '@angular/material/core';

const MY_DATE_FORMATS: MatDateFormats = {
  parse: {
    dateInput: 'LL',
  },
  display: {
    dateInput: 'MMMM',
    monthYearLabel: 'MMMM yyyy',
    dateA11yLabel: 'LL',
    monthYearA11yLabel: 'MMMM yyyy',
  },
};

@Component({
  // ...
  providers: [
    { provide: MAT_DATE_FORMATS, useValue: MY_DATE_FORMATS },
  ],
})
export class MyComponent {
  // ...
}