我有一个带有自定义验证器的反应式表单设置。我有一个方法应该重置表单，但我认为在发生这种情况时，它会干扰验证器并引发错误。

组件：

/**
 * Render the form in the UI to allow
 *
 * @memberof FilterSearchComponent
 */
renderForm() {
    this.importForm = this.fb.group({
        area: [[]],
        silo: [[]],
        department: [[]],
        location: [[]],
        segment: [[]],
        role: [[]]
    },
    {
        validator: (formGroup: FormGroup) => {
            return this.validateFilter(formGroup);
        }
    });
}

/**
 * Checks to see that at least one of the filter
 * options have been filled out prior to searching
 * for employees.
 *
 * @param formGroup
 */
validateFilter(formgroup: FormGroup) {
    if (formgroup.controls["area"].value.length ||
        formgroup.controls["silo"].value.length ||
        formgroup.controls["department"].value.length ||
        formgroup.controls["location"].value.length ||
        formgroup.controls["segment"].value.length ||
        formgroup.controls["role"].value.length
    ) {
        return null;
    } else {
        return { noFilterOptions: true };
    }
}

/**
 * On the resetting of the filter search,
 * clear our fields that were filled out.
 *
 * @param {any} data
 * @memberof FilterSearchComponent
 */
onReset(data) {
    this.importForm.reset();
}

在我的 HTML 中，我像这样调用重置方法：

(click)="onReset(importForm.value)"

重置表单后，我收到错误 ERROR TypeError：无法读取 null 的属性“length” 。

除了我在现有表单上调用该方法之外，重置是否还有其他内容？