Develop Reference

JavaScript Login Form Not Validating

Good Evening,
I am trying to create a simple JavaScript login form that will validate by checking only 1 specific email address which has been declared and 1 password that has been declared.
However, no matter what is typed into the fields, even if nothing is present, once the submit button is clicked, the user is directed to the desired page.
I need it to only allow the desired page if the email address and password are the correct. Otherwise, notify them that it is incorrect.
Here is a link to [codepen][1] so you can see the page and script.
https://codepen.io/m0rrisim0/pen/bmzyqj
Any help is appreciated in figuring out why the script is not validating.

You have to use the attribute value from document.getElementById method,
like the following example: document.getElementById("UserName").value
function validate() {
'use strict';
var UserName = document.getElementById('UserName').value;
var email = "adrian#tissue.com";
var Password = document.getElementById('Password').value;
var pass = "welcome1";
if ((UserName == email) && (Password == pass)) {
return true;
} else {
alert("UserName and/or Password Do Not Match");
return false;
}
}
Your form's inputs lack the id atrribute and should return the function on submit event.
<form action="Issues.html" method="post" id="loginform" onsubmit="return validate()">
UserName:
<input type="text" name="UserName" id="UserName">
<br>
<br>
Password:
<input type="password" name="Password" id="Password">
<hr>
<input type="submit" value="Submit">
</form>

Your problem was getElementById(), this function requires a argument and cause a error. Because of this error the line loginform.onsubmit = validate; was never reached so the submit button submit the form without calling a validate function.
There is no need to put this line inside the if statement, but if you want you can change a little bit to getElementById without the parentesis, this way it evaluates to a function that in js is truthy.
You can check a working version of you code here:
if (document && document.getElementById) {
var loginform = document.getElementById('loginform');
loginform.onsubmit = validate;
}
https://codepen.io/francispires/pen/mzvYKX
You can improve this validation

JavaScript A variable assigning itself to itself is causing problems in my code when I run it

I am working on an assignment for class, and the instructor has informed us, here is a book, here is a website, I want you to do this by this date and if you fail its not my fault. I have looked in the website, the book, and several places on stackOverflow but I don't think I've seen a problem like this come up that's been explained well enough for me to troubleshoot my way out of it in time for the turn in on Wednesday at noon (UTC -5).
I have a mockup of a registration form as an HTML page (not even HTML5, please don't ask) Here is the code for that.
function bucc_registration()
{
//THE FOLLOWING ALERT IS FOR TROUBLESHOOTING PURPOSES ONLY
//alert("inside BucC_Registration()");
//GET THE VALUES FROM THE FORM AND STORE IN THE VARIABLES FOR VALIDATION
var fullName = document.getElementById("buccFName").value;
var eMail = document.getElementById("buccEMail").value;
var phone = document.getElementById("buccPhone").value;
var pass = document.getElementById("buccPass").value;
var passConf = document.getElementById("buccPassConf").value;
//CLEAR OUT ALL OLD MESSAGES AND ERRORS
document.getElementById("error1").innerHTML = "";
document.getElementById("error2").innerHTML = "";
document.getElementById("error3").innerHTML = "";
document.getElementById("error4").innerHTML = "";
document.getElementById("error5").innerHTML = "";
document.getElementById("feedback").innerHTML = "";
//CHECK ALL VALUES FOR NON-BLANK ENTRIES
if (fullName == "" || fullName == null || fullName == fullName)
{
document.getElementById("error1").innerHTML = "Please insert your full name.";
return false;
}
//ONCE THEY BYPASS THE INPUT TEST, THEN THE VALIDATION TESTS CAN BEGIN
//fullName NEEDS NO FURTHER VALIDATION
//eMail NEEDS NO FURTHER VALIDATION
//VALIDATION FOR PHONE NUMBER TO MAKE SURE IT WAS ENTERED IN THE XXX-XXX-XXXX FORMAT AND AS NUMBERS
return false;
}
<section>
<form id="frm1" onsubmit="return bucc_registration()" action="">
<input type="text" name="buccFName" id="buccFName" /> Full Name <font color="red"><b id="error1"> </b></font><br />
<input type="text" name="buccEMail" id="buccEMail" /> Email <font color="red"><b id="error2"> </b></font><br />
<input type="text" name="buccPhone" id="buccPhone" placeholder="XXX-XXX-XXXX" /> Phone <font color="red"><b id="error3"> </b></font><br />
<input type="text" name="buccPass" id="buccPass" /> Password <font color="red"><b id="error4"> </b></font><br />
<input type="text" name="buccPassConf" id="buccPassConf" /> Password Confirmation <font color="red"><b id="error5"> </b></font><br />
<input type="submit" name="reset" value="Submit"> <input type="reset" name="reset">
</form>
<script src="scripts/BucC_Registration.js" type="text/javascript"></script>
My problem is that when I run the full code in any browser the JavaScript will fill the variables with blank or user data as it is supposed to. I tried to leave the user name blank to make sure that the error message would show up properly and that's when trouble started. It would error out and when I looked into why it wasn't displaying an error it would tell me it was because the variable was holding a value. Essentially var fullName === fullName; (Yes I did check that, it did work)
I don't know why or how. But I'm fairly certain that once I get this sorted out the other 4 variables that are doing this to me (eMail, pass, and passConf) will stop being a problem.
The current problem is this. How do I stop a variable from becoming its own... content? Its almost as if its shadowing and I'm unable to get it to stop on 4 different variables and I didn't do it intentionally.

How to detect if a specific string (email domain) is entered into an input to add/remove attribute/class from a button

So I know how to do the remove/add class/attribute from a submit button, but I need to be able to apply this to a button based off of entry into an input.
The scenario is this, user enters their email address, but if it's at a specific domain, ex: xxxx#troopers.gov I then want to be able to apply/remove the class, and attribute from the submit button, since this is a domain they are not supposed to enter for a registration.
I have done some similar validation in the past, and tried a few different methods in jQuery .val(), indexOf, etc. But still can't seem to get it working.
I tried something like
var badDomain = 'troopers.gov';
and then
if (!$('#input').val() === badDomain) {
doStuff();
}
but it didn't seem to get me anywhere.
I thought I may be able to do this without using a RegEx (I don't have much experience with that)
Would be nice to be able to account for case as well... and I don't mind if the solution is jQuery, or pure JS... for learning purposes, it would be great to see how I could do it both ways...

So this does what you want, by turning anything typed into the field in lower case and then comparing against a given array of bad strings. Any time the input field blurs, it checks and turns the submit on or off.
Take a look in the code to see some bad addresses for sample use.
var badDomains = [
"troppers.com",
"fooBarBaz.org",
"myReallyUselessDomainName.com",
"a.net"
]
$(function(){
$("#email").on("blur", function(){
var addressBad = false;
var thisEmail = $(this).val().toLowerCase();
for (var i=0; i<badDomains.length; i++){
if (thisEmail.includes(badDomains[i])){
addressBad = true;
}
}
if (addressBad) {
console.log("bad address!")
$(".disabledButton").attr('disabled', "disabled");
} else {
console.log("not a bad address!");
$(".disabledButton").removeAttr("disabled");
}
})
})
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form>
<label for="email">Email:</label>
<input type="text" name="email" id="email" />
<input class="disabledButton" type="submit" disabled />
</form>

simple workaround :
var email = document.getElementById('email');
var checkEmail = document.getElementById('checkEmail');
checkEmail.onclick = function() {
if ((email.value).includes('#troopers.gov')) alert('This email address cannot be used!');
}
<input id="email">
<button id="checkEmail">Check Email</button>
there are multiple ways around though.

You can use a regex for this purpose.
HTML:
<input type="text" id="InputTest" />
<button id="TestBtn" type="button">
Validate
</button>
<p>
Valid
</p>
CSS:
.valid{
background-color:green;
}
.invalid{
background-color: red;
}
JS:
$("#TestBtn").on("click",function() {
var pattern = /\S+#troopers\.com/gi;
var str = $("#InputTest").val();
var arr = str.match(pattern);
alert(arr); // just to see the value
if(arr !== null){
$("p").addClass("invalid");
}
else{
$("p").addClass("valid");
}
});
Here is a JSFiddle. Basically, if what the user typed in the textbox matches the expression.. then the background color turns red, but if it doesn't match, then the background color turns green.
Let me know if this helps.

You can use the following Regex for the Email property of the related Model in order to accept mails having 'abc.com' suffix:
[RegularExpression("^[a-zA-Z0-9_#./#&+-]+(\\.[a-zA-Z0-9_#./#&+-]+)*#abc.com$",
ErrorMessage = "Please enter an email with 'abc.com' suffix")]

JQuery and HTML5 custom validation not working as intended

I just started learning JS, Jquery and HTML online. I have a question, and have tried doing things which were told in the answers of similar questions on SO, but it won't help.
I have a password form which only accepts input which have atleast 6 characters, one uppercase letter and one number. I wish to show a custom validation message which could just state these conditions again.
Here's my HTML code -
<div class="password">
<label for="password"> Password </label>
<input type="password" class="passwrdforsignup" name="password" required pattern="(?=.*\d)(?=.*[A-Z]).{6,}"> <!--pw must contain atleast 6 characters, one uppercase and one number-->
</div>
I'm using JS to set the custom validation message.
JS code
$(document).ready(function () {
$('.password').on('keyup', '.passwrdforsignup', function () {
var getPW = $(this).value();
if (getPW.checkValidity() === false) {
getPW.setCustomValidity("This password doesn't match the format specified");
}
});
});
However, the custom validation message doesn't show. Please help. Thank you so much in advance! :)
UPDATE 1
I changed the password pattern to (?=.*\d)(?=.*[A-Z])(.{6,}). Based on 4castle's advise, I realized there were a few errors in my javascript, and changed them accordingly. However, the custom validation message still doesn't show.
JavaScript:
$(document).ready(function () {
$('.password').on('keyup', '.passwrdforsignup', function () {
var getPW = $(this).find('.passwrdforsignup').get();
if (getPW.checkValidity() === false) {
getPW.setCustomValidity("This password doesn't match the format specified");
}
});
});
Again, than you all in advance!

First, update this:
var getPW = $(this).find('.passwrdforsignup').get();
to this:
var getPW = $(this).get(0);
...because $(this) is already the textbox .passwrdforsignup, you can't find it in itself!
The problem with setCustomValidity is, that it does only work once you submit the form. So there is the option to do exactly that:
$(function () {
$('.password').on('keyup', '.passwrdforsignup', function () {
var getPW = $(this).get(0);
getPW.setCustomValidity("");
if (getPW.checkValidity() === false) {
getPW.setCustomValidity("This password doesn't match the format specified");
$('#do_submit').click();
}
});
});
Please note the getPW.setCustomValidity(""); which resets the message which is important because if you do not do this, getPW.checkValidity() will always be false!
For this to work the textbox (and the submit-button) must be in a form.
Working JSFiddle

There are several issues going on here.
The pattern doesn't have a capture group, so technically nothing can ever match it. Change the pattern to (?=.*\d)(?=.*[A-Z])(.{6,})
$(this).value() doesn't refer to the value of the input tag, it's referring to the value of .password which is the container div.
getPW.checkValidity() and getPW.setCustomValidity("blah") are getting run on a string, which doesn't have definitions for those functions, only DOM objects do.
Here is what you should do instead (JS code from this SO answer)
$(document).ready(function() {
$('.passwrdforsignup').on('invalid', function(e) {
var getPW = e.target;
getPW.setCustomValidity("");
if (!getPW.checkValidity())
getPW.setCustomValidity("This password doesn't match the format specified");
}).on('input', function(e) {
$(this).get().setCustomValidity("");
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form>
<div class="password">
<label for="password">Password</label>
<input type="password" class="passwrdforsignup" name="password"
required pattern="(?=.*\d)(?=.*[A-Z])(.{6,})" />
</div>
<input type="submit" />
</form>

Validate form's textarea - jQuery

I am trying to develope a plugin for an application that let the users invite their friends to use the application by just sending an email. Juts like Dropbox does to let the users invite friends and receive extra space.
I am trying to validate the only field I have in the form (textarea) with JQuery (I am new to JQuery) before submiting it and be handled by php.
This textarea will contain email addresses, separated by commas if more than one. Not even sure if textarea is the best to use for what I am trying to accomplish. Anyway here is my form code:
<form id="colleagues" action="email-sent.php" method="POST">
<input type="hidden" name="user" value="user" />
<textarea id="emails" name="emails" value="emails" placeholder="Example: john#mail.com, thiffany#mail.com, scott#mail.com..."></textarea>
</br><span class="error_message"></span>
<!-- Submit Button -->
<div id="collegues_submit">
<button type="submit">Submit</button>
</div>
</form>
Here is what I tried in Jquery with no success:
//handle error
$(function() {
$("#error_message").hide();
var error_emails = false;
$("#emails").focusout(function() {
check_email();
});
function check_email() {
if(your_string.indexOf('#') != -1) {
$("#error_message").hide();
} else {
$("#error_message").html("Invalid email form.Example:john#mail.com, thiffany#mail.com, scott#mail.com...");
$("#error_message").show();
error_emails = true;
}
}
$("#colleagues").submit(function() {
error_message = false;
check_email();
if(error_message == false) {
return true;
} else {
return false;
}
});
I hope the question was clear enough, if you need more info please let me know.
Many thanks in advance for all your help and advises.

var array = str.split(/,\s*/);
array.every(function(){
if(!validateEmail(curr)){
// email is not valid!
return false;
}
})
// Code from the famous Email validation
function validateEmail(email) {
var re = /^(([^<>()[\]\\.,;:\s#"]+(\.[^<>()[\]\\.,;:\s#"]+)*)|(".+"))#((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
return re.test(email);
}

Few errors as I noted down:
The code snippet posted here has missing braces }); at the end.
Also, what is your_string variable in the function check_email.
Also, error_message is assigned false always so the submit method will return true always.
Fixing this issues should help you.

I would use, as I commented above, append() or prepend() and just add fields. As mentioned in another post, client side use jQuery validation, but you should for sure validate server-side using a loop and filter_var($email, FILTER_VALIDATE_EMAIL). Here is a really basic example of the prepend():
<form id="colleagues" action="" method="POST">
<input type="hidden" name="user" value="user" />
<input name="emails[]" id="starter" placeholder="Email address" />
<div id="addEmail">+</div>
</br><span class="error_message"></span>
<!-- Submit Button -->
<div id="collegues_submit">
<button type="submit">Submit</button>
</div>
</form>
<script>
$(document).ready(function() {
$("#addEmail").click(function() {
$("#colleagues").prepend('<input name="emails[]" placeholder="Email address" />');
});
});
</script>

Hi please use below js code,
$('#emails').focusout(function(e) {
var email_list = $('#emails').val();
var email_list_array = new Array();
email_list_array = email_list.split(",");
var invalid_email_list=' ';
$.each(email_list_array, function( index, value ) {
if(!validEmail(value))
{
invalid_email_list=invalid_email_list+' '+value+',';
}
});
console.log(invalid_email_list+' is not correct format.');
alert(invalid_email_list+' is not correct format.');
})
function validEmail(v) {
var r = new RegExp("[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*#(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?");
return (v.match(r) == null) ? false : true;
}
If you need to check more REGEX just do it validEmail() function. I hope this will help to sort out.
thank you

Your code might look correct, but you are using bad technique. My advice is to use jquery validation plugin that would handle textarea validation.for you. Also notice. There might be many solutions for this problem, but you should stick with simple one. And the first problem i see stright away is: button tag doesnt have type attribute. You are changing #error_message html, not text. Etc...