使用JavaScript进行超级简单的电子邮件验证 [英] Super simple email validation with javascript

问题描述

我正在制作一个非常简单的电子邮件验证脚本，基本上只是检查以下

I'm making a really simple email validation script that basically just checks the following

1. 电子邮件不是空白


2. 电子邮件中包含一个至少包含1个字符的@符号


3. 有一个域名，即@后面至少有2个字母


4. 它以一个至少包含2个字母的完整停止结束

1. that the email isn't blank
2. the the email contains an @ symbol with at least 1 character before it
3. that there is a domain ie @ with at least 2 letters after it
4. that it ends with a fullstop with at least 2 letters after it

我知道有很多更多检查，但我看看这些正则表达式规则，我的思想停止工作。我想如果我开始使用这样的小东西，我可能会围绕更复杂的规则。

I know there are many more checks, but I look at these regex rules and my mind stops working. I figure if I started with something small like this I might be able to wrap my brain around more complex rules.

目前使用一些jquery我会做以下事情：

Currently using some jquery I do the following:

 var booking_email = $('input[name=booking_email]').val();

 if(booking_email == '' || booking_email.indexOf('@') == -1 || booking_email.indexOf('.') == -1) {

   // perform my alert

 }

这足以到目前为止，停止90％的虚假电子邮件......我只是想让它更有效，因为目前我的规则将允许电子邮件，如'@ domain.com'或'user @ domain。'，因为它只会检查是否存在一个fullstop和一个@符号。

This is enough to stop 90% of bogus emails so far... I would just like to make it a bit more effective because currently my rule will allow emails like '@domain.com' or 'user@domain.' because it only checks that there is a fullstop and an @ symbol.

感谢您的任何提示。

推荐答案

其他人的建议应该可以正常工作，但如果你想保持简单，试试这个：

What others have suggested should work fine, but if you want to keep things simple, try this:

var booking_email = $('input[name=booking_email]').val();

if( /(.+)@(.+){2,}\.(.+){2,}/.test(booking_email) ){
  // valid email
} else {
  // invalid email
}

即使你决定选择更强大的东西，它也应该有助于你理解正则表达式有时是多么简单。 ：）

Even if you decide to go with something more robust, it should help you understand how simple regex can be at times. :)

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