javascript-角度形式不断返回false(Angular 2)

我在Angular 2中有一个表单,正在通过模型驱动的方式进行验证.我想知道如何将状态从false更改为true,因为我有验证规则,即使用户正确填写了所有内容,它仍然使我返回无效(false).这是HTML代码.

<div class="wrap-page">
  <form [formGroup]="myForm" novalidate class="form-contato" (ngSubmit)="enviarMensagem(myForm.value, myForm.valid)">
    <div class=row>
      <div class="col s12">
        <h4> Contato </h4>
      </div>
      <div class="col s12 m12 l6">
        <label> Nome: </label>
        <input type="text" name="nome" formControlName="nome" class="forms-econ" required placeholder="ex: José Silva">
        <div class="div-validar">
          <span [hidden]="myForm.controls.nome.valid || (myForm.controls.nome.pristine && !submitted)">
            Nome Inválido (mínimo 3 caracteres).
          </span>
        </div>
      </div>
      <div class="col s12 l6">
        <label> E-mail: </label>
        <input type="email" class="forms-econ" formControlName="email" required name="email" pattern="^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$"
          placeholder="exemplo@exemplo.com">
        <div class="div-validar">
          <span [hidden]="myForm.controls.email.valid || (myForm.controls.email.pristine && !submitted)">
            E-Mail inválido
          </span>
        </div>
      </div>


      <div class="col s12 l6">
        <label>Telefone: </label>
        <input type="tel" class="forms-econ" name="telefone" formControlName="telefone" pattern="[0-9]" placeholder="(xx)9 9999-99999">
      </div>
      <div class="col s12 l6">
        <label> Motivo do Contato: </label>
        <select name="assunto" formControlName="assunto" class="forms-econ">
          <option value="motivo_01">Motivo 01</option>
          <option value="motivo_02">Motivo 02</option>
          <option value="motivo_03">Motivo 03</option>
          <option value="motivo_03">Motivo 04</option>
        </select>

      </div>
      <div class="col s12">
        <label> Mensagem: </label>
        <textarea name="mensagem" formControlName="mensagem" placeholder="Mensagem..." rows="15"> 
        </textarea>
        <div class="div-validar">
          <span [hidden]="myForm.controls.mensagem.valid || (myForm.controls.mensagem.pristine && !submitted)">
            O campo mensagem é obrigatório
          </span>
        </div>
      </div>
       <div class="col s12">
        <label> ID: </label>
        <textarea name="id" formControlName="id" placeholder="Mensagem..." rows="15"> 
        </textarea>
      </div>
      <h1> {{myForm.valid | json}} </h1> // <-- Here is where I'm printing the status of the form (always return false)
      <div class="col s12 right-align">
        <input type="submit" value="Enviar" class="btn-form">
      </div>

    </div>
  </form>
</div>

这是组件.

import { Component, Input } from '@angular/core';
import {FormGroup, FormControl, FormBuilder, Validators} from '@angular/forms';
import {formContato} from './contato.interface';
import {ContatoService} from './contato.service';

@Component({
  moduleId: module.id,
  selector: 'contato',
  templateUrl: `contato.component.html`,
  providers: [ContatoService]
})
export class ContatoComponent  { 

  public contato:formContato;
  public myForm: FormGroup;
  public submitted: boolean; 
  public events: any[] = []; 

  constructor(private _fb: FormBuilder, private mensagemContato:ContatoService) { } 

    ngOnInit() {  
      this.myForm = this._fb.group({
        nome: ['', [<any>Validators.required, <any>Validators.minLength(3)]],
        email: ['', <any>Validators.required],
        telefone: ['', <any>Validators.required],
        assunto: ['', <any>Validators.required],
        mensagem: ['', <any>Validators.required],
        id: ['']
      })      
    }


    enviarMensagem(model: formContato, isValid: boolean) {
        this.submitted = true;      
        console.log(model, isValid); // -< another way to print the status of the form (always false)
    }
}

提前致谢 ：)

解决方法:

您的问题出在电子邮件和电话验证上.他们总是验证为假.

由于您使用的是反应式表单,因此建议您将模式检查移至表单的构建中,例如：

email: ['', [<any>Validators.required, Validators.pattern(....)]],

然后,我假设您想从一开始就立即告知必须填写字段.这可以通过多种方式完成,在这里我展示了两种可能的解决方案：

<span *ngIf="myForm.get('nome').hasError('required')">
   Name required!
</span><br>

要么：

<span *ngIf="!myForm.controls.nome.pristine">
   Name required!
</span><br>

并且如其他答案中所述,您无需在提交中传递myForm.valid.

我为您设置了Plunker,在其中设置了另一封电子邮件验证：

EMAIL_REGEXP = '^[a-z0-9]+(\.[_a-z0-9]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,15})$';

以及随机电话号码验证,因为我不确定您需要哪种号码验证.这个检查电话号码只包含数字.

如果您需要,还可以在表单无效的情况下禁用“提交”按钮：

<input [disabled]="!myForm.valid" type="submit" value="Enviar" class="btn-form">

但这当然取决于您！

标签：angular,forms,angular2-forms,model-driven,javascript
来源： https://codeday.me/bug/20191026/1934840.html