錯誤描述

當form表單加FormGroup屬性時報錯 Can‘t bind to ‘formGroup‘ since it isn‘t a known property of ‘form‘

 <form nz-form [formGroup]="valForm" (ngSubmit)="submit()" role="form">
                <div nz-form-item>
                    <div nz-form-control [nzValidateStatus]="valForm.controls.email">
                        <nz-input formControlName="email"
 
 [nzPlaceHolder]="‘郵箱‘" [nzSize]="‘large‘">
                            <ng-template #suffix>
                                <i class="anticon anticon-mail"></i>
                            </ng-template>
                        </nz-input>
                        <div nz-form-explain *ngIf="valForm.controls.email.dirty&&valForm.controls.email.hasError(‘required‘)">郵箱必填</div>
                    </div>
                </div>
                <div nz-form-item>
                    <div nz-form-control [nzValidateStatus]="valForm.controls.password">
                        <nz-input formControlName="password" [nzPlaceHolder]="‘密碼‘" [nzType]="‘password‘" [nzSize]="‘large‘">
                            <ng-template #suffix>
                                <i class="anticon anticon-lock"></i>
                            </ng-template>
                        </nz-input>
                        <div nz-form-explain *ngIf="valForm.controls.password.dirty&&valForm.controls.password.hasError(‘required‘)">密碼必填</div>
                    </div>
                </div>
                <div nz-form-item nz-row>
                    <div nz-col [nzSpan]="12">
                        <label nz-checkbox formControlName="remember_me">
                            <span>記住密碼</span>
                        </label>
                    </div>
                    <div nz-col [nzSpan]="12" class="text-right">
                        <a [routerLink]="[‘/forget‘]">註冊</a>
                    </div>
                </div>
                <div nz-form-item nz-row>
                    <div nz-col [nzSpan]="24">
                        <button nz-button [disabled]="!valForm.valid" [nzType]="‘primary‘" [nzSize]="‘large‘" class="ant-btn__block">
                            <span>登錄</span>
                        </button>
                    </div>
                </div>
            </form>

原因分析與解決方案

在使用form表單時，如果用到了form-group與formControlName，需要在app.module.ts中的import引入的不僅僅有FormsModule，還要引入ReactiveFormsModule。如果是懶加載，則按需在各自的module中引入。如下：

import { CommonModule } from ‘@angular/common‘;
import { NgModule } from ‘@angular/core‘;
import { ReactiveFormsModule, FormsModule } from ‘@angular/forms‘;
import { LoginComponent } from ‘./login/login.component‘;

@NgModule({
    imports: [
        CommonModule,
        FormsModule,
        ReactiveFormsModule
 

           ],
    declarations: [
        LoginComponent
    ],
    providers: [
    ]
})
export class AccountModule {

}

Angular 報錯 Can't bind to 'formGroup' since it isn't a known property of 'form'