HTML5 form validation JavaScript code example

Example 1: input show validation message

// Validate emai

var applicationForm = document.getElementById("applicationForm");    
if (applicationForm.checkValidity()) {
  applicationForm.submit();
} else {
  applicationForm.reportValidity();
}

Example 2: javascript form validation

<form name="myForm" action="/action_page.php" onsubmit="return validateForm()" 
method="post">

 Name: <input type="text" name="fname">

<input type="submit" value="Submit">

</form>