validation of email address in js code example
Example 1: email regex javascript
ValidateEmail("[email protected]");
function ValidateEmail(email) {
var emailformat = /^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(String(email).toLowerCase());
if (email.match(emailformat)) {
alert("Nice Email!")
return true;
};
alert("That's not an email?!")
return (false);
};
Example 2: email validation in javascript
isValidEmail("[email protected]");
function isValidEmail(email) {
var emailRegex = /^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/;
return !!email && typeof email === 'string'
&& email.match(emailformat)};
};
Example 3: Email validation using javascript
function checkEmail() {
var email = document.getElementById('txtEmail');
var filter = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
if (!filter.test(email.value)) {
alert('Please provide a valid email address');
email.focus;
return false;
}
}
- Call the function on Email textbox
Example 4: email validation in javascript
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>JavaScript form validation - checking email</title>
<link rel='stylesheet' href='form-style.css' type='text/css' />
</head>
<body onload='document.form1.text1.focus()'>
<div class="mail">
<h2>Input an email and Submit</h2>
<form name="form1" action="#">
<ul>
<li><input type='text' name='text1'/></li>
<li> </li>
<li class="submit"><input type="submit" name="submit" value="Submit" onclick="ValidateEmail(document.form1.text1)"/></li>
<li> </li>
</ul>
</form>
</div>
<script src="email-validation.js"></script>
</body>
</html>
Example 5: validate email function
# Language: Perl
sub Validate_Email($)
{
my $sEmail = $_[0];
my $sRetMsg = "";
my $sUserNmRegex = "^[[:alnum:]]+([.!#\$\%&'*+-\/=?^_'{|]?[[:alnum:]]+)*";
my $sDomainRegex = "@[[:alnum:]]+([.-]{1}[[:alnum:]]+)*";
my $sEndRegex = "([.]{1}[[:alnum:]]+)+";
# Work
#--------#
if ($sEmail =~ /$sUserNmRegex$sDomainRegex$sEndRegex$/) {
$sRetMsg = "Email is valid";
}
else {
$sRetMsg = "Email is not valid";
}
return $sRetMsg;
}
my $sEmail = '[email protected]';
print "[Email:$sEmail] : " . Validate_Email($sEmail) . "\n";
# OUTPUT -> [Email:EmailExample@gmail.com] : Email is valid