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Intercept form submission, check submitted value and show easter egg

jQuery(document).ready(function() {
jQuery(".search-form").submit(function(e) {
// if submitted value = "easter egg"
// e.preventDefault();
// show easter egg
// else do nothing (let the form be submitted as usual)
});
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<form action="https://galina.xyz/" method="get" id="adminbarsearch">
<input class="adminbar-input" name="s" id="adminbar-search" type="text" value="" maxlength="150" />
<label for="adminbar-search" class="screen-reader-text">Search</label>
<input type="submit" class="adminbar-button" value="Search" />
</form>
Could you help me organize this? I failed to find out the submitted value in 'e'.

Can't find it because your class selector is looking for search-form, but it is not set, so add it
e.g. <form class="search-form"..
Then use Event.preventDefault() in the listener to prevent the submission
e.g. e.preventDefault();
jQuery(document).ready(function() {
jQuery(".search-form").submit(function(e) {
const searchVal = $(this).find('input[type=text]').val();
if (searchVal == 'easter egg') {
e.preventDefault();
console.log('surprise');
}
});
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<form class="search-form" action="https://galina.xyz/" method="get" id="adminbarsearch">
<input class="adminbar-input" name="s" id="adminbar-search" type="text" value="" maxlength="150" />
<label for="adminbar-search" class="screen-reader-text">Search</label>
<input type="submit" class="adminbar-button" value="Search" />
</form>

In jQuery you're creating a submit function for .search-form, but in your HTML, there is no element with that class. You should create submit function for your form which has id="adminbarsearch":
jQuery(document).ready(function() {
jQuery("#adminbarsearch").submit(function(e) {
if ($("#adminbar-search").val() === "easter egg")
{
// show easter egg
console.log("Easter Egg");
e.preventDefault();
}
});
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<form action="https://galina.xyz/" method="get" id="adminbarsearch">
<label for="adminbar-search" class="screen-reader-text">Search</label>
<input class="adminbar-input" name="s" id="adminbar-search" type="text" value="" maxlength="150" />
<input type="submit" class="adminbar-button" value="Search" />
</form>

Trying to Hide Javascript form

Ok I'm trying to auto login a guest account and it requires:
In header
<script language="JavaScript" type="text/JavaScript">
function guestLogin() {
document.form_login.username.value = 'guest';
document.form_login.password.value = 'guest';
document.form_login.submit();
}
</script>
And
<form action="https://www.redcheetah.com/WebPrefex/" method="post" name="form_login">
<input name="username" type="text" value="" />
<input name="password" type="password" value="" />
<input name="form_action" type="submit" value="Login" />
</form>
javascript:guestLogin();
How would I get the javascript:guestLogin(); to work without having the Login form on the page.
Any Tips?
Thanks

If you need the form to be on the page - if you can't create it on demand for whatever reason - then if you want guestLogin to work without the user seeing the form, you'll have to hide the form using CSS. It'll still be submittable, it just won't be visible:
function guestLogin() {
document.form_login.username.value = 'guest';
document.form_login.password.value = 'guest';
console.log('submitting');
document.form_login.submit();
}
document.querySelector('div').onclick = guestLogin;
form {
display: none;
}
<form action="https://www.redcheetah.com/WebPrefex/" method="post" name="form_login">
<input name="username" type="text" value="" />
<input name="password" type="password" value="" />
<input name="form_action" type="submit" value="Login" />
</form>
<div>click to submit</div>

Unable to submit form on keypress

i want to submit a form with and enter key stroke when the user enters a username and password.I get an alert coming back from my function when the enter key is pressed.But after that it doesnt submit the form. What am i doing wrong?
<form id="myForm" action="#" onsubmit="return false;" >
<div>
<input type="text" id="username" />
</div>
<div>
<input type="password" id="password" />
</div>
<div>
<button type="submit" id="btnLogin" onclick="myFunction(0)">Log in</button>
</div>
<script type="text/javascript">
function myFunction(e) {
if ((e && e.keyCode == 13) || e == 0) {
alert("The form was submitted"); // this alert gets called,but my form doesnt get submitted
document.forms.myForm.submit();
}
}

You can use like this.(Use jquery)
1.Change Input type submit to button
2.Change the code for submitting form
3.Write a keyPress event for the form
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form id="myForm" action="test.html" >
<div>
<input type="text" id="username" />
</div>
<div>
<input type="password" id="password" />
</div>
<div>
<button type="button" id="btnLogin" onclick="myFunction(0)">Log in</button>
</div>
</form>
<script type="text/javascript">
function myFunction() {
alert("form submitted");
document.getElementById("myForm").submit();
}
$('#myForm').on('keydown', function (e) {
if (e.which === 13) {
myFunction();
}
});
</script>

1) Remove return false from the form onsubmit event.
2) Remove onclick event from the button.
3) Using JS, bind a submit event to the form and do what you need in the event handler, as below:
var loginForm = document.getElementById('myForm');
loginForm && loginForm.addEventListener('submit', myFunction);
function myFunction(event) {
event.preventDefault();
alert("form is about to be submitted...");
loginForm.submit();
}
<form id="myForm">
<div>
<input type="text" id="username" />
</div>
<div>
<input type="password" id="password" />
</div>
<div>
<button type="submit" id="btnLogin">Log in</button>
</div>
</form>
Even better, remove all the JS and keep only the form as in my answer. It would submit the form on enter as that's the default behaviour when there is a button/input with type submit!

You can try this without checking keyCode. You can enter key from any input fields or button inside the form.
function myFunction(e) {
var username = e.target.querySelector('#username');
var password = e.target.querySelector('#password');
if(username.value && password.value){
alert("The form was submitted");
return true;
}
return false;
}
<form id="myForm" action="#" onsubmit="return myFunction(event)">
<div>
<input type="text" id="username" />
</div>
<div>
<input type="password" id="password" />
</div>
<div>
<button type="submit" id="btnLogin">Log in</button>
</div>
</form>

I dont think you really need javascript for this as realistically pressing enter inside a form will usually submit the form.
Notice in the example below that all we are really doing is targeting
the submit event for the form and this also includes hitting the enter
key.
However to satisfy your question
Using jQuery you could try binding the keypress event to the button click submit event.
Something like this:
$("#btnLogin").blur();
$('#btnLogin').focus().click();
p.s. remember to close your <form> tag with </form>
Example
$('#myForm').submit(function() {
var confirmSubmit = confirm("Submit the form?");
if(confirmSubmit)
{
$("#btnLogin").blur();
$('#btnLogin').focus().click();
}
else
return false;
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form id="myForm" action="yourPage.html">
<div>
<input type="text" id="username" />
</div>
<div>
<input type="password" id="password" />
</div>
<div>
<button type="submit" id="btnLogin">Log in</button>
</div>
</form>

JavaScript custom validation not working

Here is my code :
<script type="text/javascript">
function submitform() {
if(document.getElementById('name').value=='') {
alert('Please enter a name');
return false;
}
}
</script>
<form action="mail.php" method="post" onsubmit="submitform();">
<input type="text" id="name" name="name" placeholder="name">
<input type="submit" value="submit">
</form>
as expected, the form when submitted should call the submitform function, and if the name field is blank, it should return false and give an alert.
But, it just goes through.
Any explainations?

You need to call the function with return, so that the false value prevents default action (form submission)
<form action="mail.php" method="post" onsubmit="return submitform();">
<input type="text" id="name" name="name" placeholder="name">
<input type="submit" value="submit">
</form>

You need to stop a little.
You can use onSubmit, but it's best to delete your input submit and put a button.
Then on button click you can do what you want and eventually submit the form
Form:
<form action="mail.php" method="post" id="mailForm">
<input type="text" id="name" name="name" placeholder="name">
<button id="submitMailForm">Submit</button>
JS:
$( document ).on( "click", "#submitMailForm", function(e) {
//My control Here
//If all ok
$("#mailForm").submit();
});

You can use jquery instead of javascript for this kind of validation is will be very easy to implement.
<form action="mail.php" method="post">
<input type="text" id="name" name="name" placeholder="name">
<input type="submit" value="submit" id="submit">
</form>
<script>
$(document).ready(function(){
$("#submit").click(fucntion(e){
if($("#name").val() == ""){
alert("Name is empty");
e.preventDefault();
}
});
});
</script>
And dont forget to add jquery library before the script tag.

You need to change your onSubmit attribute as follows
onsubmit="return submitform();"
So your html look like this
<form action="mail.php" method="post" onsubmit="return submitform();">
<input type="text" id="name" name="name" placeholder="name">
<input type="submit" value="submit">
</form>

To cancel submission, the listener needs to return true or false. Also, if the function validates the fields, far better to name it for what it does rather than when it does it so call it something like "validateForm".
Also, giving a control a name of "name" masks the form's own name property. While that doesn't matter here, in general it's not a good idea to give any form control a name that is the same as a standard property of a form (e.g. "submit" or "reset").
So you might end up with something like:
<script>
function validateForm(form) {
if (form.personName.value == '') {
alert('Please enter a name');
return false;
}
}
</script>
<form ... onsubmit="return validateForm(this);">
<input type="text" name="personName">
<input type="submit">
</form>

<script type="text/javascript">
function submitform(event) {
if(document.getElementById('name').value=='') {
alert('Please enter a name');
event.preventDefault();
return false;
}
}
</script>
<form action="mail.php" method="post" onsubmit="submitform(event);">
<input type="text" id="name" name="name" placeholder="name">
<input type="submit" value="submit">
</form>
You need to prevent default of submit. In JS return false does not stop the propagation of the "submit" function (with frameworks can be different).
I suggest you to read:
event.preventDefault() vs. return falseenter link description here

just try this script
function submitform() {
var x = document.forms["fname"].value;
x = x.trim(); // Remove white spaces
if (x==null || x=="") {
alert("First name must be filled out");
return false;
}
}

OnSubmit Javascript not overriding submit action

I am trying to build a website with a webform. I am using Godaddy's default webform PHP and I am not sure how to validate the form for required fields.
I want the user to not be able to submit the form prior to validation. I found JavaScript files online submitted by other users that address this problem but I can not seem to get it to work.
<script language="javascript" type="text/javascript">
function checkForm() {
if (form.FirstName.value == "") {
alert("Please enter your first name");
form.FirstName.focus();
return false;
}
if (form.LastName.value == "") {
alert("Please enter your last name");
form.LastName.focus();
return false;
}
var email = form.email.value;
if (email.indexOf('#') == -1) {
alert("Plelase enter valid email");
form.email.focus();
return false;
}
return true;
}
</script>
Below is the form:
<form onsubmit="return checkForm()" action="/webformmailer.php" method="post">
<input type="hidden" name="subject" value="Submission" />
<input type="hidden" name="redirect" value="thankyou.html" />
<span>First Name:</span><br>
<input type="text" name="FirstName"/><br>
<span>Last Name:</span><br>
<input type="text" name="LastName" /><br>
<span>*Email:</span><br>
<input type="text" name="email" /><br>
<span>*Comments:</span><br>
<textarea name="comments" cols="40" rows="10">
</textarea><br>
<input type="submit" name="submit" value="submit"/> <span id ="required">*required field</span>
<input type="hidden" name="form_order" value="alpha"/> <input type="hidden" name="form_delivery" value="daily"/> <input type="hidden" name="form_format" value="html"/>
I tried submitting without entering anything and it redirects me to the thank you.

form is not defined in the function. There are several ways to handle this. The simplest would be to change return checkForm() to return checkForm(this) and
function checkForm(form) {

In the form, change checkForm() to checkForm(this). Then, in your javascript, change function checkForm() { to function checkForm(form) {
Maybe this will help.

You forgot 2 thing:
first, please add name="form" into
<form name="form" onsubmit="return checkForm()" action="/webformmailer.php" method="post">
second, you misstake close form, please add this code to end of HTML
</form>
Your HTML will look like:
<form name="form" onsubmit="return checkForm()" action="/webformmailer.php" method="post">
<input type="hidden" name="subject" value="Submission" />
<input type="hidden" name="redirect" value="thankyou.html" />
<span>First Name:</span><br>
<input type="text" name="FirstName"/><br>
<span>Last Name:</span><br>
<input type="text" name="LastName" /><br>
<span>*Email:</span><br>
<input type="text" name="email" /><br>
<span>*Comments:</span><br>
<textarea name="comments" cols="40" rows="10"></textarea><br>
<input type="submit" name="submit" value="submit"/>
<span id ="required">*required field</span>
<input type="hidden" name="form_order" value="alpha"/>
<input type="hidden" name="form_delivery" value="daily"/>
<input type="hidden" name="form_format" value="html"/>
</form>
1 other thing is in javascript, function to check email address is incorrect, Correct is:
var email = form.email.value;
var re = /^[\w-]+(\.[\w-]+)*#([\w-]+\.)+[a-zA-Z]{2,7}$/;
if (!email.match(re) || !email) {
// incorrect email address
}
New script will be:
<script language="javascript" type="text/javascript">
function checkForm() {
if (form.FirstName.value == "") {
alert("Please enter your first name");
form.FirstName.focus();
return false;
}
if (form.LastName.value == "") {
alert("Please enter your last name");
form.LastName.focus();
return false;
}
var email = form.email.value;
var re = /^[\w-]+(\.[\w-]+)*#([\w-]+\.)+[a-zA-Z]{2,7}$/;
if (!email.match(re) || !email) {
alert("Plelase enter valid email");
form.email.focus();
return false;
}
return true;
}
</script>
Goodluck!