电子邮件验证Javascript + RegEx，但排除某些域 [英] Email validation Javascript+RegEx, but to exclude certain domains

问题描述

我有客户端电子邮件验证脚本Javascript + RegEx，它可以正常工作，但是我想在验证时排除某些域，即所有Apple域，因为它们不起作用(发送到这些地址的电子邮件会被删除，恕不另行通知):@ apple.com，@ me.com，@ icloud.com，@ mac.com.

我在这里找到了适当的问题，但仍然与我要寻求帮助的问题不同.请帮忙实现这一点

可以通过RegEx修改来完成，还是在完成主要电子邮件验证后必须使用循环并搜索子字符串(@ apple.com，@ me.com，@ icloud.com，@ mac.com)?/p>

 函数verifyMe(){var msg ='';var email = document.getElementById('email').value;if(！(/^ \ w +([\ .-]?\ w +)* @ \ w +([\ .-]?\ w +)*(\.\ w {2,3})+ $/.test(电子邮件))||document.getElementById('email').value ==''){msg + ='-无效的电子邮件地址:'+ email +'\ n \ n';document.getElementById('Eemail').style.color ='#ffffff';}别的document.getElementById('Eemail').style.color ='#bbb'if(味精！='')返回false；别的{search_code();//没关系继续返回true；}}  

解决方案

两种方法都可行.

对于正则表达式，只需在正则表达式中的 @ 之后插入以下部分(负向前):

 (?！(?: apple | me | icloud | mac)\.com $) 

但是总体上更好的正则表达式是:

  ^ \ w + [-\ .. w] * @(?！(?: apple | me | icloud | mac)\.com $)\ w + [-\.\ w] *?\.\ w {2,4} $ 

对于另一种方法，应使用以下方法:

 函数isValidMailAddress(email){var match =/^\w+[-\..w]*@(\w+[-\.\w]*?\.\w{2,4})$/.exec(email);如果(！match)返回false；var forbiddenDomains = ["apple.com"，"me.com"，"icloud.com"，"mac.com"]；如果(forbiddenDomains.indexOf(match [1] .toLowerCase())> = 0)返回false；返回true；} 

由您自己决定最适合哪种方法.

I have client side email validation script Javascript+RegEx, it works fine, but I want to exclude certain domains while validating, namely all Apple domains since they do not work (emails sent to these addresses are deleted without any notice): @apple.com, @me.com, @icloud.com, @mac.com.

I found appropriate questions here, but still they are not the same I am asking for help. Please, help to implement this

Can it be done via RegEx modification, or I have to use loop and search substrings (@apple.com, @me.com, @icloud.com, @mac.com) after the main email validation is done?

function verifyMe(){
var msg='';

var email=document.getElementById('email').value;
if(!(/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(email)) || 
document.getElementById('email').value=='')
{
msg+='- Invalid Email Address: '+email+'\n\n';
document.getElementById('Eemail').style.color='#ffffff';
}
else
document.getElementById('Eemail').style.color='#bbb'
 
if(msg!='')
return false; 
else
{
search_code(); //it's ok go ahead
return true;
}
}

解决方案

Both approaches would work.

For the regex one, just insert the following part after the @ in the regex (negative lookahead):

(?!(?:apple|me|icloud|mac)\.com$)

But a better regex overall would be:

^\w+[-\.\w]*@(?!(?:apple|me|icloud|mac)\.com$)\w+[-\.\w]*?\.\w{2,4}$

For the other approach, the following should work:

function isValidMailAddress(email) {
    var match = /^\w+[-\.\w]*@(\w+[-\.\w]*?\.\w{2,4})$/.exec(email);
    if (!match)
        return false;

    var forbiddenDomains = ["apple.com", "me.com", "icloud.com", "mac.com"];
    if (forbiddenDomains.indexOf(match[1].toLowerCase()) >= 0)
        return false;

    return true;
}

It's up to you to decide which approach you feel most comfortable with.

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