如何使用JQuery来验证电子邮件地址?
当前回答
<script type="text/javascript">
$(document).ready(function() {
$('.form_error').hide();
$('#submit').click(function(){
var name = $('#name').val();
var email = $('#email').val();
var phone = $('#phone').val();
var message = $('#message').val();
if(name== ''){
$('#name').next().show();
return false;
}
if(email== ''){
$('#email').next().show();
return false;
}
if(IsEmail(email)==false){
$('#invalid_email').show();
return false;
}
if(phone== ''){
$('#phone').next().show();
return false;
}
if(message== ''){
$('#message').next().show();
return false;
}
//ajax call php page
$.post("send.php", $("#contactform").serialize(), function(response) {
$('#contactform').fadeOut('slow',function(){
$('#success').html(response);
$('#success').fadeIn('slow');
});
});
return false;
});
});
function IsEmail(email) {
var regex = /^([a-zA-Z0-9_\.\-\+])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
if(!regex.test(email)) {
return false;
}else{
return true;
}
}
</script>
<form action="" method="post" id="contactform">
<table class="contact-table">
<tr>
<td><label for="name">Name :</label></td>
<td class="name"> <input name="name" id="name" type="text" placeholder="Please enter your name" class="contact-input"><span class="form_error">Please enter your name</span></td>
</tr>
<tr>
<td><label for="email">Email :</label></td>
<td class="email"><input name="email" id="email" type="text" placeholder="Please enter your email" class="contact-input"><span class="form_error">Please enter your email</span>
<span class="form_error" id="invalid_email">This email is not valid</span></td>
</tr>
<tr>
<td><label for="phone">Phone :</label></td>
<td class="phone"><input name="phone" id="phone" type="text" placeholder="Please enter your phone" class="contact-input"><span class="form_error">Please enter your phone</span></td>
</tr>
<tr>
<td><label for="message">Message :</label></td>
<td class="message"><textarea name="message" id="message" class="contact-input"></textarea><span class="form_error">Please enter your message</span></td>
</tr>
<tr>
<td></td>
<td>
<input type="submit" class="contactform-buttons" id="submit"value="Send" />
<input type="reset" class="contactform-buttons" id="" value="Clear" />
</td>
</tr>
</table>
</form>
<div id="success" style="color:red;"></div>
其他回答
这将执行更彻底的验证，例如它检查用户名中的连续点，例如john..doe@example.com
function isValidEmail(email)
{
return /^[a-z0-9]+([-._][a-z0-9]+)*@([a-z0-9]+(-[a-z0-9]+)*\.)+[a-z]{2,4}$/.test(email)
&& /^(?=.{1,64}@.{4,64}$)(?=.{6,100}$).*/.test(email);
}
请参阅JavaScript中使用正则表达式验证电子邮件地址。
降落在这里……结果是这样的: https://html.spec.whatwg.org/multipage/forms.html#valid-e-mail-address
.．.它提供了以下正则表达式:
/^[a-zA-Z0-9.!#$%&'*+\/=?^_`{|}~-]+@[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])?)*$/
.．.这要感谢jQuery验证插件自述文件上的注释: https://github.com/jzaefferer/jquery-validation/blob/master/README.md#reporting-an-issue
所以，@Fabian的答案的更新版本是:
function IsEmail(email) {
var regex = /^[a-zA-Z0-9.!#$%&'*+\/=?^_`{|}~-]+@[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])?)*$/;
return regex.test(email);
}
希望这能有所帮助
我从jqvalidate版本1.11.0中获得这段代码，并在版本1.16.0中作为另一个方法实现。它的工作原理
jQuery.validator.addMethod("strictemail", function(value, element) {
var valid = /^((([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+(\.([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+)*)|((\x22)((((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(([\x01-\x08\x0b\x0c\x0e-\x1f\x7f]|\x21|[\x23-\x5b]|[\x5d-\x7e]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(\\([\x01-\x09\x0b\x0c\x0d-\x7f]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]))))*(((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(\x22)))@((([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.)+(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))$/i.test(value);
return valid;
}, "Escribe un correo v\u00e1lido"
);
在电子邮件规则中
'correo': {
required: 'Por favor ingresa tu correo',
email: 'Escribe un correo v\u00e1lido',
strictemail:'Escribe un correo v\u00e1lido'
}
我使用jQuery验证插件有几个原因。
你验证了，很好，现在呢?你需要显示错误，处理擦除它时，它是有效的，显示有多少错误，也许?它可以为你处理很多事情，不需要重新发明轮子。
另外，另一个巨大的好处是它托管在CDN上，在这里可以找到这个答案的当前版本:http://www.asp.net/ajaxLibrary/CDNjQueryValidate16.ashx这意味着客户端加载时间更快。
checkRegexp( email, /^((([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+(\.([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+)*)|((\x22)((((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(([\x01-\x08\x0b\x0c\x0e-\x1f\x7f]|\x21|[\x23-\x5b]|[\x5d-\x7e]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(\\([\x01-\x09\x0b\x0c\x0d-\x7f]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]))))*(((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(\x22)))@((([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.)+(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.?$/i, "eg. ui@jquery.com" );
参考:JQUERY UI网站
