最小/最大日期的Angular反应形式自定义验证器

Question

我想在FormGroup中为用户可以为其DOB选择的最小和最大日期创建自定义验证器，最小日期为1900年1月1日，最大日期为当前日期。这是我当前的代码：

export class CustomValidators {
    static dateMinimum(mindate: string): ValidatorFn {
        return (control: AbstractControl): ValidationErrors | null => {
            if (control.value == null) {
                return null;
            }
            const controlDate = moment(control.value, '01/01/1990');
            if (!controlDate.isValid()) {
                return null;
            }

            const validationDate = moment(mindate);

            return controlDate.isBefore(validationDate) ? null : {
                'date-minimum': {
                    'date-minimum': validationDate.format('01/01/1990'),
                    'actuel': controlDate.format('01/01/1990')
                }
            };
        };
    }

    static dateMaximum(maxdate: string): ValidatorFn {
        return (control: AbstractControl): ValidationErrors | null => {
            if (control.value == null) {
                return null;
            }

            const controlDate = moment(control.value, '');

            if (!controlDate.isValid()) {
                return null;
            }

            const validationDate = moment(maxdate);

            return controlDate.isAfter(validationDate) ? null : {
                'date-maximum': {
                    'date-maximum': validationDate.format(''),
                    'actuel': controlDate.format('')
                }
            };
        };
    }
}

export class PersonalInfoComponent implements OnInit {
    peopleCoveredDOBs = new FormControl('', [Validators.required, CustomValidators.dateMaxmimum(''), CustomValidators.dateMinimum('1900-0-1')])
    startDate = new FormControl('', Validators.required)
    numCovered = new FormControl('', [Validators.required, Validators.max(8)])
    selfCovered = new FormControl('', Validators.required)
    ZIPCode = new FormControl('', [Validators.required, Validators.minLength(5), Validators.maxLength(5)])

    personalInfoForm: FormGroup = this.builder.group({
        peopleCoveredDOBs: this.peopleCoveredDOBs,
        startDate: this.startDate,
        numCovered: this.numCovered,
        selfCovered: this.selfCovered,
        ZIPCode: this.ZIPCode

    });
}

当前，dateMaximum wavlidator没有传递到窗体控件中。有没有更简单的方法来添加多个静态自定义验证器？我还想使用我的公共badZIPSubmitted = false;为邮政编码添加一个自定义验证器；