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How can I add an animation on my HTML form when submit input is clicked and the input is empty on Javascript?

Basically, I'm coding a Javascript code that validate if a form is empty, so if one input is empty, it add an animation from Animate.css library. And if two inputs are empty, both will make the shake animation, if the whole form is empty, it will shake.
I've tried a global function with conditions that add a class and it doesn't work.
This is my form:
<form action="" id="form">
<label for="name">Name</label>
<input
type="text"
placeholder="Name"
id="name"
minlength="3"
required
/>
<br />
<label for="email">Email</label>
<input type="email" placeholder="Emai" id="email" required />
<br />
<label for="subject">Subject</label>
<input
type="text"
placeholder="Subject"
id="subject"
minlength="3"
required
/>
<br />
<label for="message">Message</label>
<textarea
name="message"
id="message"
minlength="5"
placeholder="Message"
required
style="resize: none; height: 200px"
></textarea>
<br />
<button type="submit" class="paper-btn" id="submit">
Send message
</button>
</form>
Javascript:
(function () {
var form = document.getElementById("form"),
name = form.name,
email = form.email,
subject = form.subject;
message = form.message;
function validateName(e) {
if (name.value == "" || name.value == null) {
form.classList.add("animate__animated");
name.classList.add("animate__shakeX");
e.preventDefaul();
} else {
console.log("error");
}
}
function validateEmail(e) {
if (email.value == "" || email.value == null) {
email.classList.add("animate__animated");
email.classList.add("animate__shakeX");
e.preventDefaul();
}
}
function validateSubject(e) {
if (subject.value == "" || subject.value == null) {
subject.classList.add("animate__animated");
subject.classList.add("animate__shakeX");
e.preventDefaul();
}
}
function validateMessage(e) {
if (subject.value == "" || subject.value == null) {
message.classList.add("animate__animated");
message.classList.add("animate__shakeX");
e.preventDefaul();
}
}
function validateForm(e) {
validateName(e);
validateEmail(e);
validateSubject(e);
validateMessage(e);
}
form.addEventListener("submit", validateForm);
});

I think you just need to invoke the function. ValidateForm isn't being called
(function() {
var name = document.getElementById("name");
if (name.value == "" || name.value == null) {
name.classList.add("animate__animated");
name.classList.add("animate__shakeX");
}
})();

Contact Form Sending message even if captcha not correct

I am trying to implement a Contact from with custom Captcha using PHPmailer. The contact form works fine. The PHPmailer works fine as well. To avoid a lot of spam letters, I decided to implement custom Captcha, the problem is that the emails go anyway captcha is correct or incorrect.
<h4 class="sent-notification"></h4>
<form id="myForm">
<p>
<label>Name<span style="color:#ff0000; margin-left:5px;">*</span></label>
<input id="name" type="text" name="name" required>
</p>
<p>
<label>Company<span style="color:#ff0000; margin-left:5px;">*</span></label>
<input id="subject" type="text" name="company" required>
</p>
<p>
<label>Email<span style="color:#ff0000; margin-left:5px;">*</span></label>
<input id="email" type="email" name="email" required>
</p>
<p class="full">
<label>Message<span style="color:#ff0000; margin-left:5px;">*</span></label>
<textarea id="body" name="message" rows="5" required></textarea>
</p>
<div class="contain">
<input type="text" id="capt" readonly="readonly">
<div id="refresh"> <img src="assets/img/icons/refresh.png" alt="refresh" width="50px" onclick="cap()"></div>
<input type="text" id="textinput" placeholder="Refresh to type Captcha" required>
<button onclick="validcap()">Check</button>
</div>
<p>
<button class="full" onclick="sendEmail()" value="Send An Email">Submit</button>
</p>
</form>
Script for PHPmailer
<script type="text/javascript">
function sendEmail() {
var name = $("#name");
var email = $("#email");
var subject = $("#subject");
var body = $("#body");
var textinput = $("#textinput");
if (isNotEmpty(name) && isNotEmpty(email) && isNotEmpty(subject) && isNotEmpty(body) && isNotEmpty(textinput)) {
$.ajax({
url: 'sendEmail.php',
method: 'POST',
dataType: 'json',
data: {
name: name.val(),
email: email.val(),
subject: subject.val(),
body: body.val(),
textinput: textinput.val()
}, success: function (response) {
$('#myForm')[0].reset();
$('.sent-notification').text("Message Sent Successfully");
}
});
}
}
function isNotEmpty(caller) {
if (caller.val() == "") {
caller.css('border', '1px solid red');
return false;
} else
caller.css('border', '');
return true;
}
</script>
Script for Captcha
<script type="text/javascript">
function cap() {
var alpha=['A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V'
,'W','X','Y','Z','1','2','3','4','5','6','7','8','9','0','a','b','c','d','e','f','g','h','i',
'j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'];
var a=alpha[Math.floor(Math.random()*62)];
var b=alpha[Math.floor(Math.random()*62)];
var c=alpha[Math.floor(Math.random()*62)];
var d=alpha[Math.floor(Math.random()*62)];
var e=alpha[Math.floor(Math.random()*62)];
var f=alpha[Math.floor(Math.random()*62)];
var sum=a + b + c + d + e + f;
document.getElementById("capt").value=sum;
}
function validcap() {
var string1 = document.getElementById('capt').value;
var string2 = document.getElementById('textinput').value;
if (string1 == string2){
alert("Form is validated Succesfully");
return true;
}
else {
alert("Please enter a valid captcha");
return false;
}
}
</script>

The onsubmit event handler javascript not working

I have a problem. When I clicked the submit button nothing happens, even when I filled out the username and password with numbers (I don't want the username and password contains any number so I did make the condition for it), there is no alert display. I do not know where the problem comes from? Can you guys help me with this
Note: the reset function works fine
function validateInput() {
var firstName = document.forms["sign_up"]["firstName"];
var lastName = document.forms["sign_up"]["lastName"];
var email = document.forms["sign_up"]["email"];
var reg = /^[a-zA-Z]+$/;
if (firstName.value !== '' || lastName.value !== '' || email.value !== '') {
if (firstName.value.match(reg) && lastName.value.match(reg)) {
alert("Form is submitted");
// return true;
return false; // for the demo, so it doesn't submit
} else {
if (firstName.value.match(reg) === false) {
document.getElementById("error").innerHTML = "Numbers are not allowed in username";
return false;
} else if (lastName.value.match(reg) === false) {
document.getElementById("error").innerHTML = "Numbers are not allowed in password";
return false;
}
}
}
}
function reset() {
document.getElementById("first").innerHTML = "";
document.getElementById("last").innerHTML = "";
document.getElementById("email").innerHTML = "";
}
<form id="sign_up" onsubmit="return validateInput()">
<p id="error"></p>
<label for="firstName">First Name</label>
<input type="text" id="firstName" value="" placeholder="Enter your first name">
<label for="lastName">Last Name</label>
<input type="text" id="lastName" value="" placeholder="Enter your last name">
<label for="email">Email</label>
<input type="email" id="email" value="" placeholder="Enter your email">
<button type="submit">Submit</button>
<button type="button" onclick="reset();">Cancel</button>
</form>

Use the Pattern attribute in input for validation like below
<input type="text" id="firstName" value="" pattern="[^0-9]*" title="Numbers are not allowed" placeholder="Enter your first name">
for more references: https://www.w3schools.com/tags/att_input_pattern.asp
And for reset functionality use reset
<input type="reset" value="reset">
It's better than create a special function for it and it saves your number of lines:-)

First, try to avoid to inline event handlers as they are not rec-emended at all. Also to reset form values you can simply use reset() method on the form.
Also, do not use innerHTML just to set the text of your error. You can use textContent instead which is better fit in your example.
You can use addEventListener with submit event to check for validation on your firstname and lastname.
I have fixed your code and its all working as expected.
Live Working Demo:
let form = document.getElementById("sign_up")
var firstName = document.getElementById("firstName")
var lastName = document.getElementById("lastName")
var email = document.getElementById("email")
var reset = document.getElementById("clearValues")
var reg = /^[a-zA-Z]+$/;
form.addEventListener('submit', function(e) {
e.preventDefault()
if (firstName.value != '' || lastName.value != '' || email.value != '') {
if (firstName.value.match(reg) && lastName.value.match(reg)) {
alert("Form is submitted");
} else if (!firstName.value.match(reg)) {
document.getElementById("error").textContent = "Numbers are not allowed in username";
} else if (!lastName.value.match(reg)) {
document.getElementById("error").textContent = "Numbers are not allowed in password";
}
}
})
reset.addEventListener('click', function(e) {
document.getElementById("sign_up").reset();
})
input {
display:block;
}
<head>
</head>
<body>
<form id="sign_up" action="#">
<p id="error"></p>
<label for="firstName">First Name</label>
<input type="text" id="firstName" value="" placeholder="Enter your first name">
<label for="lastName">Last Name</label>
<input type="text" id="lastName" value="" placeholder="Enter your last name">
<label for="email">Email</label>
<input type="email" id="email" value="" placeholder="Enter your email">
<button type="submit">
Submit
</button>
<button type="button" id="clearValues" onclick="reset();">
Cancel
</button>
</form>
</body>

You don't need to return a function in onsubmit event. This should work fine.
<form id="sign_up" onsubmit="validateInput()">
Reference:
https://www.w3schools.com/jsref/event_onsubmit.asp

JQuery HTML form validation still triggers email with blank entries

I have an HTML form with three mandatory fields in. I don't want the form to submit the AJAX call if they are empty.
$("#contact").submit(function(e){
e.preventDefault();
var ajaxurl = '<?php echo WEB_URL; ?>contact_send.php';
var data = $(this).serializeArray();
console.log(data);
var valid = true;
if( $('input[name="Name"]').val() == '' || $('input[name="Email"]').val() == '' || $('input[name="Phone"]').val() == '') {
valid = false;
}
if(valid) {
$.post(ajaxurl, data, function (response) {
$(".show_homecontact_form_success").fadeIn(1000);
$("#contact")[0].reset();
});
} else {
alert('Please fill in all mandatory fields.');
}
});
<form id="contact" name="contact" method="post" action="">
<label for="Name">Name: *</label>
<input type="text" name="Name" id="name" />
<input name="robotest" type="hidden" value="" />
<label for="Position">Position:</label>
<input type="text" name="Position" id="position" />
<label for="Company">Company:</label>
<input type="text" name="Company" id="company" />
<label for="Address">Address:</label>
<input type="text" name="Address" id="address" />
<label for="Email">Email: *</label>
<input type="text" name="Email" id="email" />
<label for="Email">Phone number: *</label>
<input type="text" name="Phone" id="phone" />
<label for="Event_Subject">What is the subject of the event?:</label>
<input type="text" name="Event_Subject" id="subject" />
<label for="Event_Date">What is the date of the event?:</label>
<input type="text" name="Event_Date" id="date" />
<label for="Additional_info">Additional Information:</label>
<br />
<textarea name="Additional_info" rows="20" cols="20" id="info"></textarea>
<input id="formsubmitted" type="submit" name="submit" value="submit" class="submit-button" />
</form>
This does give the popup box if you try and fill it in empty, but I have received an email with all blank fields.
How is the user getting past the validation and managing to send the form through blank?

More than likely you've not popped in a preventDefault() in there, so the form is doing a normal (non-AJAX) post after your function ends. What's the method/action on your form? Perhaps there doesn't need to be an action at all?

Try this:
$("#contact").submit(function(e){
e.preventDefault();
var ajaxurl = '<?php echo WEB_URL; ?>contact_send.php';
var data = $(this).serializeArray();
console.log(data);
var valid;
if( $('input[name="Name"]').val().length > 0
&& $('input[name="Email"]').val().length > 0
&& $('input[name="Phone"]').val().length > 0) {
valid = true;
} else {
valid = false;
}
if(valid) {
$.post(ajaxurl, data, function (response) {
$(".show_homecontact_form_success").fadeIn(1000);
$("#contact")[0].reset();
});
} else {
alert('Please fill in all mandatory fields.');
}
});
As Jigar pointed out, you can shorten the code by assigning an initial value to the valid variable and removing else block:
var valid = false;
if( $('input[name="Name"]').val().length > 0
&& $('input[name="Email"]').val().length > 0
&& $('input[name="Phone"]').val().length > 0) {
valid = true;
}

Can't insert spaces in my text input

I have a form with 3 text inputs, the problem is, when I want to insert a space it doesn't allow me to. My code is:
<form action="post.php" name="MYFORM" id="MYFORM" method="post">
<label>Name</label>
<input name="name" size="30" type="text" id="name">
<br clear="all" />
<label>Email</label>
<input name="email" size="30" type="text" id="email">
<br clear="all" />
<label>Message</label>
<textarea id="message" name="message"></textarea>
<br clear="all" /><br clear="all" />
<label> </label>
<input value="Send" type="submit" id="Send">
When it submits it is validated by a javascript file and afterwards mailed by a php file, but I dont think that matters.
PROBLEM: cant add spaces in these text inputs.
Thanx in advance
EDIT: JAVASCRIPT CODE:
$(document).ready(function() {
$('#Send').click(function() {
// name validation
var nameVal = $("#name").val();
if(nameVal == '') {
$("#name_error").html('');
$("#name").after('<div class="errorwrapper"><label class="error" id="name_error">Please enter your name.</label></div>');
return false
}
else
{
$("#name_error").html('');
}
/// email validation
var emailReg = /^([\w-\.]+#([\w-]+\.)+[\w-]{2,4})?$/;
var emailaddressVal = $("#email").val();
if(emailaddressVal == '') {
$("#email_error").html('');
$("#email").after('<div class="errorwrapper"><label class="error" id="email_error">Please enter your email address.</label></div>');
return false
}
else if(!emailReg.test(emailaddressVal)) {
$("#email_error").html('');
$("#email").after('<div class="errorwrapper"><label class="error" id="email_error">Enter a valid email address.</label></div>');
return false
}
else
{
$("#email_error").html('');
}
var mesVal = $("#message").val();
if(mesVal == '') {
$("#mes_error").html('');
$("#message").after('<div class="errorwrapper"><label class="error" id="mes_error">Please enter a message.</label></div>');
}
else
{
$("#after_submit").html('');
$("#Send").after('<label class="success" id="after_submit">Your message has been submitted.</label>');
$("#after_submit").fadeOut(9000);
$("#mes_error").html('');
clear_form();
}
return false;
})
function clear_form()
{
$("#name").val('');
$("#email").val('');
$("#message").val('');
$(".errorwrapper").empty();
}
});

I would have never figured it out if i wouldnt have seen an other person with an error in using a keyboard controlled javascript slideshow. Sry if i caused you guys wasting some time.
I was using fadeslideshow 2.0 by Pascal Bajorat.