[英]Angular 4 reactive form Email validation by regular expression fail
I'm using a reactive form to get user input.我正在使用反应式表单来获取用户输入。 Not satisfied with the EmailValidator
I'm using a pattern.对我使用的模式不满意EmailValidator
。
emailRegEx = '^[a-z0-9._%+-]+@[a-z0-9.-]+\.[a-z]{2,4}$';
this.email = new FormControl('', [Validators.required, Validators.pattern(emailRegEx)]);
And the HTML:和 HTML:
<input type="email" formControlName="email" [ngClass]="contactForm.get('email').errors && (contactForm.get('email').dirty || isButtonClicked) ? 'contact-input input-error' : 'contact-input'">
But here's the thing, for some reason the regex is accepting 4 chars after the @
, without a period.但事情就是这样,由于某种原因,正则表达式在@
之后接受 4 个字符,没有句点。 name@d
--> error name@d
--> 错误name@doma
--> no error name@doma
--> 没有错误name@domain.
--> error --> 错误name@domain.com
--> no error name@domain.com
--> 没有错误
I checked this regex in multiple online regex testers, and they all only accept the last example above, none of them accept the second one.我在多个在线正则表达式测试器中检查了这个正则表达式,他们都只接受上面的最后一个例子,没有一个接受第二个。
EDIT:编辑:
The regular expression is fine and works well, the problem is that somehow the pattern validator isn't parsing the regex correctly, or something.正则表达式很好并且运行良好,问题是模式验证器以某种方式没有正确解析正则表达式,或者其他什么。
The pattern is not correct as a string .该模式作为字符串不正确。 In deed you are inside a string so to escape '.'实际上你在一个字符串中,所以要转义 '.' you need to use double backslash like:你需要使用双反斜杠,如:
emailRegEx = '^[a-z0-9._%+-]+@[a-z0-9.-]+\\.[a-z]{2,4}$'
Or if you want to avoid doing so i suggest to use:或者,如果您想避免这样做,我建议使用:
emailRegEx = /^[a-z0-9._%+-]+@[a-z0-9.-]+\.[a-z]{2,4}$/
Edit: Keep in mind that this is a simple pattern that exclude a lot of valid email address (see RFC 5322 (sections 3.2.3 and 3.4.1 ) and RFC 5321 ).编辑:请记住,这是一个简单的模式,它排除了许多有效的电子邮件地址(请参阅 RFC 5322(第3.2.3和3.4.1节)和 RFC 5321 )。 For example the angular build in email validator use the following pattern例如,电子邮件验证器中的角度构建使用以下模式
/^(?=.{1,254}$)(?=.{1,64}@)[-!#$%&'*+/0-9=?A-Z^_`a-z{|}~]+(\.[-!#$%&'*+/0-9=?A-Z^_`a-z{|}~]+)*@[A-Za-z0-9]([A-Za-z0-9-]{0,61}[A-Za-z0-9])?(\.[A-Za-z0-9]([A-Za-z0-9-]{0,61}[A-Za-z0-9])?)*$/
You can use CustomValidator package that offers too much types of validation : https://www.npmjs.com/package/ng2-validation您可以使用提供太多验证类型的 CustomValidator 包: https : //www.npmjs.com/package/ng2-validation
import it like that :像这样导入:
import { CustomValidators } from 'ng2-validation';
and use it in your form control :并在您的表单控件中使用它:
this.email = new FormControl('', [Validators.required, CustomValidators.email]);
Regards,问候,
我用这个:
/^[a-z0-9._%+-]+@[a-z0-9.-]+\.[a-z]{2,4}$/
import {Component} from '@angular/core';
import {FormBuilder, FormGroup, Validators} from '@angular/forms';
@Component({
templateUrl: './forgot-password.component.html',
styleUrls: ['./forgot-password.component.scss']
})
export class ForgotPasswordComponent {
psResetForm: FormGroup;
constructor(private fb: FormBuilder) {
this.psResetForm = fb.group({
'email': [null, Validators.compose([Validators.required, Validators.email])]
});
}
makeRequestToResetLink(formData, valid: boolean) {
if (valid) {
alert(formData.email);
}
}
}
Your Template should look like this您的模板应如下所示
<form [formGroup]="psResetForm" (ngSubmit)="makeRequestToResetLink(psResetForm.value,psResetForm.valid)">
<input type="email" formControlName="email"/>
<button type="submit">
submit
</button>
</form>
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.