jquery validation example
Example 1: jquery validation example
reference : https://www.sitepoint.com/basic-jquery-form-validation-tutorial/
// Wait for the DOM to be ready
$(function() {
// Initialize form validation on the registration form.
// It has the name attribute "registration"
$("form[name='registration']").validate({
// Specify validation rules
rules: {
// The key name on the left side is the name attribute
// of an input field. Validation rules are defined
// on the right side
firstname: "required",
lastname: "required",
email: {
required: true,
// Specify that email should be validated
// by the built-in "email" rule
email: true
},
password: {
required: true,
minlength: 5
}
},
// Specify validation error messages
messages: {
firstname: "Please enter your firstname",
lastname: "Please enter your lastname",
password: {
required: "Please provide a password",
minlength: "Your password must be at least 5 characters long"
},
email: "Please enter a valid email address"
},
// Make sure the form is submitted to the destination defined
// in the "action" attribute of the form when valid
submitHandler: function(form) {
form.submit();
}
});
});
Example 2: form validation using jquery
<script src="https://cdn.jsdelivr.net/jquery.validation/1.16.0/jquery.validate.min.js"></script>
then add javascript code:
$(document).ready(function() {
$("#form").validate();
});
</script>
Example 3: jquery form validation
function submitFunction(event){
event.preventDefault();
}
$("#form_id").submit(submitFunction);
Example 4: form validation using jquery
<html>
<body>
<h2>Validation of a form</h2>
<form id="form" method="post" action="">
First name:<br>
<input type="text" name="firstname" value="john">
<br>
Last name:<br>
<input type="text" name="lastname" value="Doe">
<br>
Email:<br>
<input type="email" name="u_email" value="[email protected]">
<br>
<br><br>
<input type="submit" value="Submit">
</form>
</body>
</html>