Angular2中的通用邮件验证程序

Question

我想创建一个用户将输入邮件的表单.我想验证客户端的邮件格式.Angular2中是否有任何通用邮件验证程序？

注意:类似于angularjs验证器:https://docs.angularjs.org/api/ng/input/input%5Bemail%5D

Answer 1

你只能使用html:

<md-input-container class="md-icon-float md-block" flex-gt-sm>
    <label>Email</label>
        <input md-input
            id="contact-email"
            type="text"
            ngControl="email"
            #email="ngForm"
            [(ngModel)]="contact.email"
            required
            pattern="^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,6})+$">

    <div class="md-errors-spacer" [hidden]="email.valid || email.untouched">
        <div class="md-char-counter" *ngIf="email.errors && email.errors.required">
            Email is required
        </div>
        <div class="md-char-counter" *ngIf="email.errors && email.errors.pattern">
            Email is invalid
        </div>
    </div>
</md-input-container>

Answer 2

角度4及以上:

根据这个你可以使用"电子邮件验证器".

例:

如果您使用模板驱动的表单:

<input type="email" name="email" email>
<input type="email" name="email" email="true">
<input type="email" name="email" [email]="true">

如果您使用模型驱动的表单(又名ReactiveFormsModule),请使用Validators.email:

this.myForm = this.fb.group({
    firstName: ['', [<any>Validators.required]],
    email: ['', [<any>Validators.required, <any>Validators.email]],
});

旧答案:你可以使用angular 2 FormGroup,

通过使用validators.pattern和regex,如下所示:

 let emailRegex = '^[a-z0-9]+(\.[_a-z0-9]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,15})$';
 this.myForm = this.fb.group({
        firstName: ['', [<any>Validators.required]],
        email: ['', [<any>Validators.required,  <any>Validators.pattern(emailRegex) ]],
 });

Answer 3

您可以使用表单指令和控件来执行此操作.

export class TestComponent implements OnInit {
     myForm: ControlGroup;
     mailAddress: Control;

     constructor(private builder: FormBuilder) {
         this.mailAddress = new Control(
            "",
            Validators.compose([Validators.required, GlobalValidator.mailFormat])
        );
     }

     this.addPostForm = builder.group({
            mailAddress: this.mailAddress
     });
}

进口:

import { FormBuilder, Validators, Control, ControlGroup, FORM_DIRECTIVES } from 'angular2/common';

然后你的GlobalValidator班级:

export class GlobalValidator {

    static mailFormat(control: Control): ValidationResult {

        var EMAIL_REGEXP = /^[a-z0-9!#$%&'*+\/=?^_`{|}~.-]+@[a-z0-9]([a-z0-9-]*[a-z0-9])?(\.[a-z0-9]([a-z0-9-]*[a-z0-9])?)*$/i;

        if (control.value != "" && (control.value.length <= 5 || !EMAIL_REGEXP.test(control.value))) {
            return { "incorrectMailFormat": true };
        }

        return null;
    }  
}

interface ValidationResult {
    [key: string]: boolean;
}

然后你的HTML:

<div class="form-group">
    <label for="mailAddress" class="req">Email</label>
    <input type="text" ngControl="mailAddress" />
    <div *ngIf="mailAddress.dirty && !mailAddress.valid" class="alert alert-danger">
        <p *ngIf="mailAddress.errors.required">mailAddressis required.</p>
        <p *ngIf="mailAddress.errors.incorrectMailFormat">Email format is invalid.</p>
    </div>
</div>

有关这方面的更多信息,您可以阅读这篇好文章:https://medium.com/@daviddentoom/angular-2-form-validation-9b26f73fcb81#.jrdhqsnpg或查看此github项目以获取工作示例.

(编辑:reg ex似乎没有检查域中的点

我改用这个

/^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/

cfr http://emailregex.com/

Answer 4

这是使用RegEx验证字段的另一种方法.您可以将方法绑定到该字段的keyUp事件.

在您的组件中:

import {NgForm} from 'angular2/common';

//...

emailValidator(email:string): boolean {
    var EMAIL_REGEXP = /^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;

    if (!EMAIL_REGEXP.test(email)) {
        return false;
    }
    return true; 
}

在你的HTML(视图)中

<div class="form-group">
    <label>Email address</label>
    <input type="email" class="form-control" [(ngModel)]="user.email"
           placeholder="Email address" required ngControl="email"
           #email="ngForm"
           (keyup)="emailValidator(email.value) == false ? emailValid = false : emailValid = true">
    <div [hidden]="emailValid || email.pristine" class="alert alert-sm alert-danger">Email address is invalid</div>
</div>

另一个选项(必填字段+用户离开时验证)

<div class="form-group">
    <label for="registerEmail">Email address</label>
    <input type="email" class="form-control" [(ngModel)]="user.email"
           placeholder="Email address" required ngControl="email"
           #email="ngForm"
           (blur)="emailValidator(email.value) == true ? emailIsInvalid = false : emailIsInvalid = true">
    <div [hidden]="email.valid || email.pristine" class="alert alert-sm alert-danger">This field is required</div>
    <div [hidden]="!emailIsInvalid" class="alert alert-sm alert-danger">Email address is invalid</div>
</div>

此方法适用于任何验证,因此您可以更改RegEx并验证信用卡,日期,时间等...

Answer 5

另一种方法是使用自定义指令.我喜欢这种方法,因为它与其他ng2验证器更加一致.

import { Directive, forwardRef } from '@angular/core';
import { NG_VALIDATORS } from '@angular/forms';
import { Validator, AbstractControl } from '@angular/forms';


@Directive({
    selector: '[validateEmail][formControlName], [validateEmail][formControl],[validateEmail][ngModel]',
    providers: [
        { provide: NG_VALIDATORS, useExisting: forwardRef(() => EmailValidator), multi: true }
    ]
})
export class EmailValidator implements Validator {

    constructor() {
    }

    validate(c: AbstractControl) {
        let EMAIL_REGEXP = /^[a-z0-9!#$%&'*+\/=?^_`{|}~.-]+@[a-z0-9]([a-z0-9-]*[a-z0-9])?(\.[a-z0-9]([a-z0-9-]*[a-z0-9])?)*$/i;

        return EMAIL_REGEXP.test(c.value) ? null : {
            validateEmail: {
                valid: false
            }
        };


    }}

然后在html中使用是

<input class="form-control" 
               type="email"
               [(ngModel)]="user.emailAddress" 
               name="emailAddress" 
               placeholder="first.last@example.com"
               validateEmail