JavaScript 可以匹配一个常规表达式:

emailAddress.match( / some_regex /);

下面是RFC22电子邮件的常规表达式:

^((?>[a-zA-Z\d!#$%&'*+\-/=?^_`{|}~]+\x20*|"((?=[\x01-\x7f])[^"\\]|\\[\x01-\x7f])*
"\x20*)*(?<angle><))?((?!\.)(?>\.?[a-zA-Z\d!#$%&'*+\-/=?^_`{|}~]+)+|"((?=[\x01-\x
7f])[^"\\]|\\[\x01-\x7f])*")@(((?!-)[a-zA-Z\d\-]+(?<!-)\.)+[a-zA-Z]{2,}|\[(((?(?<
!\[)\.)(25[0-5]|2[0-4]\d|[01]?\d?\d)){4}|[a-zA-Z\d\-]*[a-zA-Z\d]:((?=[\x01-\x7f])
[^\\\[\]]|\\[\x01-\x7f])+)\])(?(angle)>)$

<pre>
**The personal_info part contains the following ASCII characters.
1.Uppercase (A-Z) and lowercase (a-z) English letters.
2.Digits (0-9).
3.Characters ! # $ % & ' * + - / = ? ^ _ ` { | } ~
4.Character . ( period, dot or fullstop) provided that it is not the first or last character and it will not come one after the other.**
</pre>
*Example of valid email id*
<pre>
yoursite@ourearth.com
my.ownsite@ourearth.org
mysite@you.me.net
xxxx@gmail.com
xxxxxx@yahoo.com
</pre>
<pre>
xxxx.ourearth.com [@ is not present] 
xxxx@.com.my [ tld (Top Level domain) can not start with dot "." ]
@you.me.net [ No character before @ ]
xxxx123@gmail.b [ ".b" is not a valid tld ]
xxxx@.org.org [ tld can not start with dot "." ]
.xxxx@mysite.org [ an email should not be start with "." ]
xxxxx()*@gmail.com [ here the regular expression only allows character, digit, underscore and dash ]
xxxx..1234@yahoo.com [double dots are not allowed
</pre>
**javascript mail code**

    function ValidateEmail(inputText)
    {
    var mailformat = /^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/;
    if(inputText.value.match(mailformat))
    {
    document.form1.text1.focus();
    return true;
    }
    else
    {
    alert("You have entered an invalid email address!");
    document.form1.text1.focus();
    return false;
    }
    }

我稍微修改了Jaymon的答案,对于那些想要真正简单的验证的人来说:

anystring@anystring.anystring

常规表达:

/^\S+@\S+\.\S+$/

防止多种 @ 标志相匹配:

/^[^\s@]+@[^\s@]+\.[^\s@]+$/

上面的序列匹配整个序列,删除领先和 ^ 并追踪 $ 如果你想匹配在序列中的任何地方。

如果你想匹配整个字符串,你可能想先切割()字符串。

示例 JavaScript 功能:

函数验证电子邮件(电子邮件) { var re = /\S+@\S+\.\S+/; return re.test(电子邮件); } console.log(验证电子邮件(我的电子邮件是 anystring@anystring.any')); // true console.log(验证电子邮件(我的电子邮件是 anystring@anystring.any')); // false

所有电子邮件地址都包含一个“at”(即 @)符号。

email.includes('@')

或者,如果您需要支持 IE/older 浏览器:

email.indexOf('@') > 0

即使你能完全确定一个电子邮件是否是RFC合成有效,这不会告诉你它是否属于提供它的人。

要做到这一点,请发送验证消息。

如果你正在使用NG模式和材料,这就是工作。

vm.validateEmail = '([a-zA-Z0-9_.]{1,})((@[a-zA-Z]{2,})[\\\.]([a-zA-Z]{2}|[a-zA-Z]{3}))';

谁使用 @pvl 解决方案,并希望它通过 ESLint Prefer 模板,那么这里是一个版本,我使用模板字母而不是字符集合。

validateEmail(email) {
    let sQtext = '[^\\x0d\\x22\\x5c\\x80-\\xff]';
    let sDtext = '[^\\x0d\\x5b-\\x5d\\x80-\\xff]';
    let sAtom = '[^\\x00-\\x20\\x22\\x28\\x29\\x2c\\x2e\\x3a-\\x3c\\x3e\\x40\\x5b-\\x5d\\x7f-\\xff]+';
    let sQuotedPair = '\\x5c[\\x00-\\x7f]';
    let sDomainLiteral = `\\x5b(${sDtext}|${sQuotedPair})*\\x5d`;
    let sQuotedString = `\\x22(${sQtext}|${sQuotedPair})*\\x22`;
    let sDomainRef = sAtom;
    let sSubDomain = `(${sDomainRef}|${sDomainLiteral})`;
    let sWord = `(${sAtom}|${sQuotedString})`;
    let sDomain = `${sSubDomain}(\\x2e${sSubDomain})*`;
    let sLocalPart = `${sWord}(\\x2e${sWord})*`;
    let sAddrSpec = `${sLocalPart}\\x40${sDomain}`; // complete RFC822 email address spec
    let sValidEmail = `^${sAddrSpec}$`; // as whole string

    let reValidEmail = new RegExp(sValidEmail);

    return reValidEmail.test(email);
}