Javascript Block Form Submission

Javascript Block Form Submission - javascript

How would I block form submission if the user presses cancel for confirmation of selecting Doctor.
<form method="post" action="registration.php" autocomplete="off" onsubmit="return validateMyForm();">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<select name="role" id="role">
<option value="Patient">Patient</option>
<option value="Doctor">Doctor</option>
<option value="Nurse" >Nurse</option>
</select>
<input type="submit">
</form>
<script>
$("#role").change(function(){
var val = $(this).val();
switch (val){
case "Doctor":
var d = confirm("Are you a doctor?");
}
});
</script>

To disable the submission of the form you can use return false on the onsubmit attribute of the form.
Since you already have a call to the validateMyForm() function there, you just need to make sure that this function return false:
function validateMyForm() {
....
// do some checks...
return false;
}
If you to prevent the submission of the form based on the answer to your confirm, you should save the answer in some variable that you can use later on:
<script>
var d;
$("#role").change(function(){
var val = $(this).val();
switch (val){
case "Doctor":
d = confirm("Are you a doctor?");
}
});
</script>
And inside the function:
function validateMyForm() {
if (!d) {
return false;
}
}

Your d variable will be false if cancel is pressed, so:
$("#role").change(function(){
let val = $(this).val();
let blockSubmit = false;
if (val == 'Doctor') {
let d = confirm("Are you a doctor?");
blockSubmit = !d;
}
else {
blockSubmit = false
}
$('input[type="submit"]').prop('disabled', blockSubmit);
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<form method="post" action="registration.php" autocomplete="off" onsubmit="return validateMyForm();">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<select name="role" id="role">
<option value="Patient">Patient</option>
<option value="Doctor">Doctor</option>
<option value="Nurse">Nurse</option>
</select>
<input type="submit">
</form>

Related

Disable submit button until all form inputs have data

I'm trying to disable the submit button until all inputs have some data. Right now the button is disabled, but it stays disabled after all inputs are filled in. What am I doing wrong?
$(document).ready(function (){
validate();
$('input').on('keyup', validate);
});
function validate(){
if ($('input').val().length > 0) {
$("input[type=submit]").prop("disabled", false);
} else {
$("input[type=submit]").prop("disabled", true);
}
}

Here's a modification of your code that checks all the <input> fields, instead of just the first one.
$(document).ready(function() {
validate();
$('input').on('keyup', validate);
});
function validate() {
var inputsWithValues = 0;
// get all input fields except for type='submit'
var myInputs = $("input:not([type='submit'])");
myInputs.each(function(e) {
// if it has a value, increment the counter
if ($(this).val()) {
inputsWithValues += 1;
}
});
if (inputsWithValues == myInputs.length) {
$("input[type=submit]").prop("disabled", false);
} else {
$("input[type=submit]").prop("disabled", true);
}
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input type="text"><br>
<input type="text"><br>
<input type="text"><br>
<input type="submit" value="Join">

Vanilla JS Solution.
In question selected JavaScript tag.
HTML Form:
<form action="/signup">
<div>
<label for="username">User Name</label>
<input type="text" name="username" required/>
</div>
<div>
<label for="password">Password</label>
<input type="password" name="password" />
</div>
<div>
<label for="r_password">Retype Password</label>
<input type="password" name="r_password" />
</div>
<div>
<label for="email">Email</label>
<input type="text" name="email" />
</div>
<input type="submit" value="Signup" disabled="disabled" />
</form>
JavaScript:
var form = document.querySelector('form')
var inputs = document.querySelectorAll('input')
var required_inputs = document.querySelectorAll('input[required]')
var register = document.querySelector('input[type="submit"]')
form.addEventListener('keyup', function(e) {
var disabled = false
inputs.forEach(function(input, index) {
if (input.value === '' || !input.value.replace(/\s/g, '').length) {
disabled = true
}
})
if (disabled) {
register.setAttribute('disabled', 'disabled')
} else {
register.removeAttribute('disabled')
}
})
Some explanation:
In this code we add keyup event on html form and on every keypress check all input fields. If at least one input field we have are empty or contains only space characters then we assign the true value to disabled variable and disable submit button.
If you need to disable submit button until all required input fields are filled in - replace:
inputs.forEach(function(input, index) {
with:
required_inputs.forEach(function(input, index) {
where required_inputs is already declared array containing only required input fields.
JSFiddle Demo: https://jsfiddle.net/ydo7L3m7/

You could try using jQuery Validate
http://jqueryvalidation.org/
<script src="http://ajax.aspnetcdn.com/ajax/jquery.validate/1.9/jquery.validate.js"></script>
And then do something like the following:
$('#YourFormName').validate({
rules: {
InputName1: {
required: true
},
InputName2: { //etc..
required: true
}
}
});

Refer to the sample here.
In this only input of type="text" has been considered as described in your question.
HTML:
<div>
<form>
<div>
<label>
Name:
<input type="text" name="name">
</label>
</div>
<br>
<div>
<label>
Age:
<input type="text" name="age">
</label>
</div>
<br>
<div>
<input type="submit" value="Submit">
</div>
</form>
</div>
JS:
$(document).ready(function () {
validate();
$('input').on('keyup check', validate);
});
function validate() {
var input = $('input');
var isValid = false;
$.each(input, function (k, v) {
if (v.type != "submit") {
isValid = (k == 0) ?
v.value ? true : false : isValid && v.value ? true : false;
}
if (isValid) {
$("input[type=submit]").prop("disabled", false);
} else {
$("input[type=submit]").prop("disabled", true);
}
});
}

Try to modify your function like this :
function validate(){
if ($('input').val() != '') {
$("input[type=submit]").prop("disabled", false);
} else {
$("input[type=submit]").prop("disabled", true);
}
}
and place some event trigger or something like onkeyup in jquery.But for plain js, it looks like this :
<input type = "text" name = "test" id = "test" onkeyup = "validate();">
Not so sure of this but it might help.

Here is a dynamic code that check all inputs to have data when wants to submit it:
$("form").submit(function(e) {
var error = 0;
$('input').removeClass('error');
$('.require').each(function(index) {
if ($(this).val() == '' || $(this).val() == ' ') {
$(this).addClass('error');
error++;
}
});
if (error > 0) {
//Means if has error:
e.preventDefault();
return false;
} else {
return true;
}
});
.error {
border: 1px solid red;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<form>
<form action="google.com">
<input type="text" placeholder="This is input #1" class="require" />
<input type="text" placeholder="This is input #2" class="require" />
<input type="submit" value="submit" />
</form>
</form>
Now you see there is a class called require, you just need to give this class to inputs that have to have value then this function will check if that input has value or not, and if those required inputs are empty Jquery will prevent to submit the form!

Modify your code
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js" type="text/javascript"></script>
<input type="text"><br>
<input type="text"><br>
<input type="text"><br>
<input type="submit" value="Join">
<script>
$(document).ready(function (){
validate();
$('input').on('keyup', validate);
});
function validate(){
$("input[type=text]").each(function(){
if($(this).val().length > 0)
{
$("input[type=submit]").prop("disabled", false);
}
else
{
$("input[type=submit]").prop("disabled", true);
}
});
}
</script>

function disabledBtn(_className,_btnName) {
var inputsWithValues = 0;
var _f = document.getElementsByClassName(_className);
for(var i=0; i < _f.length; i++) {
if (_f[i].value) {
inputsWithValues += 1;
}
}
if (inputsWithValues == _f.length) {
document.getElementsByName(_btnName)[0].disabled = false;
} else {
document.getElementsByName(_btnName)[0].disabled = true;
}
}
<input type="text" class="xxxxx" onKeyUp="disabledBtn('xxxxx','fruit')"><br>
<input type="text" class="xxxxx" onKeyUp="disabledBtn('xxxxx','fruit')"><br>
<input type="text" class="xxxxx" onKeyUp="disabledBtn('xxxxx','fruit')"><br>
<input type="submit" value="Join" id="yyyyy" disabled name="fruit">

Form validation on submit don't work

Hi so i was reading how to validate html forms, all my validators client side are working woth patterns and type. The problem is when i press submit the javascript validation dont run. There is my code:
<script language="javascript">
function validateForm()
{
var xa = document.forms["regform"]["password"].value;
var xb = document.forms["regform"]["password2"].value;
var xc = document.forms["regform"]["email"].value;
var xd = document.forms["regform"]["email2"].value;
if (xa == xb && xc == xd){
return true; }
else{ return false; alert("Please enter a valid captcha code");}
}
$(document).ready(function(e) {
try {
$("body select").msDropDown();
} catch(e) {
alert(e.message);
}
});
</script>
Them the form:
<form name="regform" onsubmit="return validateForm();" action="actions/register_acc.php" method="post">
<input type="password" name="password" class="input-style" required="required">
<input type="password2" name="password" class="input-style" required="required">
<input name="email" class="input-style" placeholder="your#email.com" required="required" pattern="[a-z0-9._%+-]+#[a-z0-9.-]+\.[a-z]{2,4}$">
<input name="email2" class="input-style" placeholder="your#email.com" required="required" pattern="[a-z0-9._%+-]+#[a-z0-9.-]+\.[a-z]{2,4}$">
<input type="submit" value="ok">
</form>
Inside the form i also have these:
<select name="selectname" id="webmenu">
<option value="1">1</option>
<option value="2">2</option>
</select>
And in the head these:
<script src="js/msdropdown/jquery-1.3.2.min.js" type="text/javascript"></script>
<script src="js/msdropdown/jquery.dd.min.js" type="text/javascript"></script>

The problem lies in the validateForm method itself, specifically in the else block. You're returning false before the alert call. Swap the two calls around and you should see the alert message appear.
For clarity's sake, I would change the message in the alert box as it isn't directly relevant to the fields you're validating.
function validateForm()
{
var xa = document.forms["regform"]["password"].value;
var xb = document.forms["regform"]["password2"].value;
var xc = document.forms["regform"]["email"].value;
var xd = document.forms["regform"]["email2"].value;
if (xa == xb && xc == xd){
return true;
}
else {
alert("Please enter a valid captcha code");
return false;
}
}
See this Fiddle

Adding Span with Class to a input tag with Jquery

I am trying to add a Span after my Input that will have the class "error" and the text "test".
I've tried the append, and insertAfter methods. I can get the code to work on jsfiddle but I cannot get the code to work on my application.
I have put the HTML and JS/Jquery below. My end result would have a Span (with the class error) next to each input with the type text. I would then set a value for this span based on a validation loop.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Zito - Lab 7</title>
<link rel="stylesheet" href="main.css">
<script src="http://html5shiv.googlecode.com/svn/trunk/html5.js" type="text/javascript"></script>
<script src="http://code.jquery.com/jquery-1.8.3.min.js" type="text/javascript"></script>
<script src="reservation.js" type="text/javascript"></script>
</head>
<body>
<h1>Reservation Request</h1>
<form action="response.html" method="get"
name="reservation_form" id="reservation_form">
<fieldset>
<legend>General Information</legend>
<label for="arrival_date">Arrival date:</label>
<input type="text" name="arrival_date" id="arrival_date" autofocus><br>
<label for="nights">Nights:</label>
<input type="text" name="nights" id="nights"><br>
<label>Adults:</label>
<select name="adults" id="adults">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
</select><br>
<label>Children:</label>
<select name="children" id="children">
<option value="0">0</option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
</select><br>
</fieldset>
<fieldset>
<legend>Preferences</legend>
<label>Room type:</label>
<input type="radio" name="room" id="standard" class="left" checked>Standard
<input type="radio" name="room" id="business" class="left">Business
<input type="radio" name="room" id="suite" class="left last">Suite<br>
<label>Bed type:</label>
<input type="radio" name="bed" id="king" class="left" checked>King
<input type="radio" name="bed" id="double" class="left last">Double Double<br>
<input type="checkbox" name="smoking" id="smoking">Smoking<br>
</fieldset>
<fieldset>
<legend>Contact Information</legend>
<label for="name">Name:</label>
<input type="text" name="name" id="name"><br>
<label for="email">Email:</label>
<input type="text" name="email" id="email"><br>
<label for="phone">Phone:</label>
<input type="text" name="phone" id="phone" placeholder="999-999-9999"><br>
</fieldset>
<input type="submit" id="submit" value="Submit Request"><br>
</form>
</body>
</html>
JS/JQuery
$(document).ready(function() {
var emailPattern = /\b[A-Za-z0-9._%+-]+#[A-Za-z0-9.-]+\.[A-Za-z]{2,4}\b/;
var phonePattern = /\b(\d{3})([-])(\d{3})([-])(\d{4})\b/;
var datePattern = /\b(0[1-9]|1[012])([/])(0[1-9]|1[0-9]|2[0-9]|3[01])([/])((20)\d\d)\b/;
$(":text").after("<span class='error'>*</span>");
$("#arrival_date").focus();
$("#reservation_form").submit(
function(event) {
var isValid = true;
// validate arrival date
var arrivalDate = $("#arrival_date").val();
if (arrivalDate == "") {
$("#arrival_date").next().text("This field is required");
isValid = false;
} else if (!datePattern.test(arrivalDate)) {
$("#arrival_date").next().text("Must be in the format 12/12/2012");
isValid = false;
} else {
$("#arrival_date").next().text("");
}
// validate nights
var nights = $("#nights").val();
if (nights == "") {
$("#nights").next().text("This field is required");
isValid = false;
} else if ((isNaN(parseInt(nights))) || (parseInt(nights) <=0)) {
$("#nights").next().text("This field must be a number and not zero");
isValid = false;
} else {
$("#nights").next().text("");
}
// validate name
var name = $("#name").val();
if (name == "") {
$("#name").next().text("This field is required");
isValid = false;
} else {
$("#name").next().text("");
}
// validate email
var email = $("#email").val();
if (email == "") {
$("#email").next().text("This field is required");
isValid = false;
} else if (!emailPattern.test(email) ) {
$("#email").next().text("Must be a valid email address.");
isValid = false;
} else {
$("#email").next().text("");
}
// validate phone
var phone = $("#phone").val();
if (phone == "") {
$("#phone").next().text("This field is required");
isValid = false;
} else if (!phonePattern.test(phone) ) {
$("#phone").next().text("Must be in the format 999-999-9999");
isValid = false;
} else {
$("#phone").next().text("");
}
if (isValid == false) {
event.preventDefault();
$("#arrival_date").focus();
}
}
);
}); // end ready

Most easy way is to add a Div container around the form and just append the warning to that. To effectively append after an element you need to give it a class or id.
var email = $("#email"); //using class instead of input:text
var html = "<span class='error'>TEST!</span>"
email.after( html );
But I personally would like something like this better:
var generateError = function(){
var html = "<div id='error' style='top: 0; left:0; width:100%; height: 50px; background-color: red; text-allign: center; display:none; z-index: 100;'> ERROR!!</div>"
$(body).append( html );
}
var showError = function( text ){
var err = $("#error");
err.html( text );
err.show(500).delay(2000).hide(500);
}
Code is fairly self-explaining, but this will make two functions: generateError and showError.
generateError you need to call before you want to show the error, possibly when the page loads it will add a small header on top of all you other elements and will appear hidden.
showError uses a text argument with the error you want to show. Then it will set the text to the div and show it for two seconds.
This then is more what you are looking for?
$(document).ready(function () {
var input = $("input");
var emailPattern = /\b[A-Za-z0-9._%+-]+#[A-Za-z0-9.-]+\.[A-Za-z]{2,4}\b/;
input.keypress(function (ele) {
// if regex.test( input ) === false
createErrors(ele.target);
})
});
var createErrors = function (ele) {
$('<span>TEST!</span>').insertAfter(ele);
$("#arrival_date").focus();
};
This works on keypress, that means the regex gets checked every time a key is pressed. It also passes the element where the user is typing as parameter, this means that you wont get errors for all input:text, but only for the ones where there is an error.
Updated Fiddle (still not perfect, but if its an school exercise this will help you to finish it :)

jQuery: Script isn't preventing submit function from firing when form has errors

Essentially, I am trying to have my form clear all input fields on submit if the default values are still present. Then if there are default values still present, then the submit process is stopped. The form clears the fields on submit, but wont stop the submit button from executing like its suppose to. Please help me out on this. I wrote this myself, and still trying to figure out why it isn't working.
The jQuery Script Below:
<script type="text/javascript" >
$(document).ready(function(){
$(".forms").each(function(){
var DefaultValue = $(this).value;
$("#Form_1").submit(function(){
if ( CheckInput() == "empty" ){
return false;
}
});
function CheckInput(){
var x = '';
$(".forms").each(function(){
if ($(this).value == DefaultValue){
this.value = '';
var y = "empty";
return y;
}
x = y;
return x;
});
}
});
});
</script>
The HTML code below:
<form id="Form_1">
<table>
<tr>
<td>
<table cellpadding="2" cellspacing="3" width="500px">
<tr>
<td>
<div class="InputContainer">
<input name="FirstName" value="First Name" class="forms" type="text"required="true" ></input>
<div class="InfoBlurp">First Name<div class="InfoTip"></div></div></div>
</td>
<td>
<div class="InputContainer">
<input name="BirthDate" value="Birth Date(MM/DD/YYYY)" class="forms" type="text" required="true" ></input>
<div class="InfoBlurp">Birth Date(MM/DD/YYYY)<div class="InfoTip"></div></div></div>
</td>
<td>
<div class="InputContainer">
<input name="Email" value="Email#sample.com" validType="email" class="forms" type="text" required="true"/></input>
<div class="InfoBlurp">Email#sample.com<div class="InfoTip"></div></div></div>
</td>
</tr>
</table>
<input id="Button_1" class="topopup" type="submit" value="" style="background-color: #FFFFFF; border:none; cursor:pointer;">
</form>

Your checkInput method is not returning anything, you are returning values from the each callback function not from the CheckInput method.
$(document).ready(function () {
$(".forms").each(function () {
var DefaultValue = $(this).value;
$("#Form_1").submit(function () {
if (CheckInput() == "empty") {
return false;
}
});
function CheckInput() {
var x = '';
$(".forms").each(function () {
if ($(this).value == DefaultValue) {
this.value = '';
x = "empty";
//return false to stop further iteration of the loop
return false;
}
});
return x;
}
});
});

Validation of Dropdown list doesn't work

The following is the code for validating a form with radio buttons, text boxes and dropdown list. The javascript for validating radio buttons and textbox works. But the javascript for dropdown doesn't work. Can you tell me what is it that I've done wrong?
Please help!
Thanks in advance.
<!DOCTYPE html>
<html>
<head>
<script type="text/javascript">
function validateForm()
{
var checked = null;
var name1 = document.forms["information"]["firstname"].value;
var n=name1.split(" ");
var name = n[0];
var sex = document.forms["information"]["sex"];
var e = document.getElementById("prof1");
var strUser = e.options[e.selectedIndex].value;
var strUser1 = e.options[e.selectedIndex].text;
if(name == null || name== "")
{
alert('Enter First Name');
return false;
}
for (var i=0;i<2;i++)
{
if(sex[i].checked)
{
checked = sex[i];
return true;
}
}
if (checked == null)
{
alert(' Enter Sex');
return false;
}
if(strUser==0)
{
alert("Enter Profession");
return false;
}
}
</script>
</head>
<body>
<form name="information" onsubmit="return validateForm()" method="post">
<text style="color:red">*</text> First Name: <input type="text" name="firstname"><br><br>
Last Name: <input type="text" name="lastname"><br><br>
<text style="color:red">*</text> Sex: <input type="radio" name="sex" value="Male"> Male
<input type="radio" name="sex" value="Female"> Female <br><br>
<text style="color:red">*</text> Profession:
<select id="prof1">
<option value="0"> Select </option>
<option value="1"> Engineer </option>
<option value="2"> Doctor </option>
<option value= "3"> Lawyer </option>
<option value="4"> Others </option>
</select>
<input type="submit" value="Submit" />
</form>
</body>
</html>

if(sex[i].checked)
{
checked = sex[i];
return true;
}
Remove return true above.

for ( var i = 0; i < 2; i++) {
if (sex[i].checked) {
checked = sex[i];
//return true;
}
}
Uncomment the return true;
The return statement inside the loop return the value and this results to non-execution of code written after this return statement.
2.
if(strUser==0)
replace with
if(strUser=="0")
Reason :
http://www.w3schools.com/jsref/prop_select_selectedindex.asp
http://www.w3schools.com/jsref/prop_option_value.asp

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Javascript Block Form Submission - javascript

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Disable submit button until all form inputs have data

Form validation on submit don't work

Adding Span with Class to a input tag with Jquery

jQuery: Script isn't preventing submit function from firing when form has errors

Validation of Dropdown list doesn't work

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