Basic Email Validation with JavaScript
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
Email: <input type="text" id="txtData" /><span id="msg"></span>
<button onclick="checkEmail()">Check Data</button>
<script>
function checkEmail(){
let email=document.getElementById("txtData").value;
let rex=/^[a-zA-Z0-9]+[@][a-zA-Z0-9]+[.][a-zA-Z]{2,3}$/
let ok=rex.test(email);
if(ok==true){
document.getElementById("msg").innerHTML="Ok";
}else{
document.getElementById("msg").innerHTML="Error";
}
}
</script>
</body>
</html>
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