Angular 4 表单校验2

1. 将表单的方法移动到单独的ts文件夹中

2. code

export  function mobileValidator(control: FormControl): any {
  const myreg = /^(((13[0-9]{1})|(15[0-9]{1})|(18[0-9]{1}))+\d{8})$/;
  const valid = myreg.test(control.value);
  console.log('mobile result: ' + valid);
  return valid ? null : {mobile: true};

}

export  function equalValidator(group: FormGroup): any {
  const password: FormControl = group.get('password') as FormControl;
  const pconfirm: FormControl = group.get('pconfirm') as FormControl;
  const valid: boolean = password.value === pconfirm.value;
  console.log('password equal: ' + valid);
  return valid ? null : {equal: {descerr: '密码和确认密码不匹配'}};
}

　　

3. html

<form [formGroup]="formModel" (submit)="submit()">
   <div>
     用户名：<input  type="text" formControlName="username">
     <div [hidden]="!formModel.hasError('required','username')">
       用户名是必填项
     </div>
     <div [hidden]="!formModel.hasError('minlength','username')">
       用户名是最小长度为6
     </div>
     电话：<input  type="text" formControlName="mobile">
     <div [hidden]="!formModel.hasError('mobile','mobile')">
       请输入正确的手机号
     </div>
     <div formGroupName="passwordsGroup">
       密码：<input  type="password" formControlName="password">
       确认密码：<input  type="password" formControlName="pconfirm">
       <div [hidden]="!formModel.hasError('minlength',['passwordsGroup', 'password'])">
         密码最小长度为6
       </div>
       <div [hidden]="!formModel.hasError('equal','passwordsGroup')">
         {{formModel.getError('equal','passwordsGroup')?.descerr}}
       </div>
     </div>

   </div>
  <div><button type="submit">保存</button></div>
</form>

　　

4. 控制器

  formModel: FormGroup;

  constructor(private http: Http, fb: FormBuilder) {
    this.formModel = fb.group({
      username:  ['', [Validators.required, Validators.minLength(6)]],
      mobile:  ['', mobileValidator],
      passwordsGroup: fb.group({
          password:  ['',  Validators.minLength(6)],
          pconfirm: ['']
      }, { validator: equalValidator} ),
    });
  }

  submit() {
    const isValid: boolean = this.formModel.get('username').valid;
    console.log('username: ' + isValid);
    const errors: any = this.formModel.get('username').errors;
    console.log('username errors' + JSON.stringify(errors));
    if ( this.formModel.valid) {
      console.log(this.formModel.value);
    }

  }

　　

5. 状态字段