Develop Reference

Jquery min and max show new page

I would like to validate myForm, so the user can input a value between 1 and a max on 99. When I submit a number I get showed a blank page, which is the select.php. But I would like to stay on my indexpage, and get the message "You are below". Can anyone see what is wrong here?
index.html:
<div class="content">
<p id="number"></p>
<div class="form">
<form id="myForm" action="select.php" method="post">
<input type="number" name="numbervalue" id="numberinput">
<input type="submit" id="sub" Value="Submit">
<span id="result"></span>
<span id="testnumber"></span>
</form>
</div>
</div>
JS:
var minNumberValue = 1;
var maxNumberValue = 99;
$('#sub').click(function(e){
e.preventDefault();
var numberValue = $('input[name=numbervalue]').val();
if(isNaN(numberValue) || numberValue == ''){
$('#testnumber').text('Please enter a number.')
return false;
}
else if(numberValue < minNumberValue){
$('#testnumber').text('You are below.')
return false;
}
else if(numberValue > maxNumberValue){
$('#testnumber').text('You are above.')
return false;
}
return true;
});
// Insert function for number
function clearInput() {
$("#myForm :input").each( function() {
$(this).val('');
});
}
$(document).ready(function(){
$("#sub").click( function(e) {
e.preventDefault(); // remove default action(submitting the form)
$.post( $("#myForm").attr("action"),
$("#myForm :input").serializeArray(),
function(info){
$("#result").html(info);
});
clearInput();
});
});
// Recieve data from database
$(document).ready(function() {
setInterval(function () {
$('.latestnumbers').load('response.php')
}, 3000);
});

How about utilizing the 'min' and 'max' attributes of the input tag, it would handle all the validation itself:
<input type="number" name="numbervalue" min="1" max="99">
Cheers,

Here's a little function to validate the number:
var minNumberValue = 1;
var maxNumberValue = 99;
$('#sub').click(function(e){
e.preventDefault();
var numberValue = $('input[name=numbervalue]').val();
if(isNaN(numberValue) || numberValue == ''){
$('#result').text('Please enter a number.')
return false;
}
else if(numberValue < minNumberValue){
$('#result').text('You are below.')
return false;
}
else if(numberValue > maxNumberValue){
$('#result').text('You are above.')
return false;
}
return true;
});
You can define the minimum and maximum values by changing the two variables (be sure to check these server-side too if you are submitting to a server, as the user could manipulate the code via dev tools to change these boundaries or submit whatever they want).
The result message is displayed in your span#result, otherwise you could use alert() too.
The important things here are the e parameter in the click function (it's the JavaScript event), calling e.preventDefault() (if you don't do this, the form will submit before finishing validation, as the default action for an input[type=submit] is to submit a form [go figure...]), returning false whenever the conditions aren't met, and returning true if it satisfies the validation. The return true; allows the form to follow its action parameter.
And a fiddle with this: https://jsfiddle.net/3tkms7vn/ (edit: forgot to mention, I commented out return true; and replaced it with a call to add a message to span#result just to prevent submission on jsfiddle.)

If/Else statement doesn't run inside function

I am trying to validate some input fields. More specifically, the number always has to be positive.
EDIT: JS code
$(document).ready(function($) {
$('.error-message').hide();
function priceCheck() {
$('input[class="price"]').each(function() {
priceValue = $(this).val();
console.log(priceValue); //only runs until here and seems it exists the function then
if (priceValue <= 0) {
evt.preventDefault();
return false;
} else {
}
});
}
//POST FORM
$("#offerInquiry").on('valid.fndtn.abide', function(evt) {
//prevent the default behaviour for the submit event
// Serialize standard form fields:
var formData = $(this).serializeArray();
var checked = $("#terms").is(":checked");
priceCheck();
if (checked == false) {
$('.error-message-container').empty();
$('.error-message-container').append("<%= pdo.translate("
checkBox.isObligatory ") %>");
$('.error-message').show();
$('.bid-error').css("display", "block");
evt.preventDefault();
return false;
} else {
loading();
$.post("/inquiry.do?action=offer&ajax=1", formData,
function(data) {
window.top.location.href = data.redirectPage;
});
}
return false;
});
});
I have written a function that I separately call on form submit. But it only runs until the console log. Why is the if else statement not executed?

You are using evt.preventDefault() but you didn't capture the event in evt.
For example, you could try this instead: add the evt parameter to the priceCheck function, and then pass evt to that function when you call it, like this: priceCheck(evt)
HOWEVER, you do not need to use preventDefault here. You can simply return a boolean value from priceCheck and use that in your submit handler.
You also you had a couple errors with string concatentation. $('.error-message-container').append("<%= pdo.translate(" checkBox.isObligatory ") %>"); was missing the + to concat those strings together . You can view errors like this in the Console tab of your JavaScript debugger. (UPDATE This is JSP injection, but it may not work the way you are trying to use it here. The server function pdo.translate will only execute once, on the server side, and cannot be called via client script... but it can emit client script. Focus on solving other problems first, then come back to this one.)
Finally, you were reading string values and comparing them to numbers. I used parseFloat() to convert those values from the input fields into numbers.
Here is the fixed code.
$(document).ready(function($) {
$('.error-message').hide();
function priceCheck() {
var priceValid = true; // innocent until proven guilty
$('input[class="price"]').each(function() {
priceValue = parseFloat($(this).val()) || 0;
if (priceValue <= 0) {
priceValid = false;
return false;
}
});
return priceValid;
}
$("form").on("submit", function() {
$("#offerInquiry").trigger('valid.fndtn.abide');
});
//POST FORM
$("#offerInquiry").on('valid.fndtn.abide', function(evt) {
//prevent the default behaviour for the submit event
// Serialize standard form fields:
var formData = $(this).serializeArray();
var checked = $("#terms").is(":checked");
var priceValid = priceCheck();
if (priceValid) {
$('.error-message').hide();
if (checked == false) {
$('.error-message-container').empty();
$('.error-message-container').append("<%= pdo.translate(" + checkBox.isObligatory + ") %>");
$('.error-message').show();
$('.bid-error').css("display", "block");
return false;
} else {
loading();
$.post("/inquiry.do?action=offer&ajax=1", formData,
function(data) {
window.top.location.href = data.redirectPage;
});
}
}
else
{
$('.error-message').show().text("PRICE IS NOT VALID");
}
return false;
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form id="offerInquiry">
Price 1
<input type="text" class="price" id="price1" value="0.00" />
<br/>Price 2
<input type="text" class="price" id="price1" value="0.00" />
<br/>
<input type='submit' />
<div class="error-message">ERROR!</div>
</form>

I have to press submit button twice in IE using jquery framework to submit form

I have a strange behaviour in IE browser.
I have simple form:
<form name="test" id="test" action="some_url_here" method="post">
<input type="text" name="url" id="url" class="required" />
<input type="text" name="page" id="page" class="required" />
...
<input type="submit" name="submit" value="Submit" />
</form>
and in JS:
var result = true;
$("#test").on("submit", function(){
$(".required").removeClass("error");
$.each($("input.required"), function(k, v) {
if($(this).val() === '') {
$(this).addClass("error");
result = false;
return false;
}
});
if(result) {
if(!IsValidUrl($("input[name='url']").val()){
$("input[name='url']").addClass("error");
return false;
}
} else {
return false;
}
});
Let's assume that I filled all fields correctly.
In Chrome & Firefox, when I press on submit button then works fine, just once time.
In IE (all versions) I have to press two times on the submit form to execute/sumbit the form.
Why ?
I tried also to put after IsValidUrl condition:
$(this).submit();
But no success.

You have two options here. On both you need to stop the submit event and validate the form.
One is to go through all the fields in the form, add the class error to the invalid ones (if there's any), set the variable result and return (or submit if everything is alright).
The other is to stop the test at the first invalid field found, not using the variable result, and return (or submit if everything is alright).
JS
$(function () {
$("#test").on("submit", function (e) {
// Stop the submit, because you need to validate the form before proceeding.
e.preventDefault();
// Check the comments below to decide for the use of the variable.
var result = true;
$(".required").removeClass("error");
$.each($("input.required"), function (k, v) {
// Test for empty fields or, if it's the URL, check whether is valid.
if ($(this).val() === "" || ($(this).attr("name") == "url" && !IsValidUrl($(this).val())) {
// Add class error to the invalid fields.
$(this).addClass("error");
// At this point, you could just return false stopping the loop,
// or keep going to make sure all the invalid fields will get the
// class error. In this case, you can still use the variable result.
result = false;
// Keep going, so, no return.
// return false;
}
});
// If you decided to carry on through all the fields, and don't return
// false at the first error, test for the result value.
// As this is the case...
if (!result) return false;
else $(this).submit();
// If you didn't return previously...
// $(this).submit();
});
});

Javascript function fires twice on clicking 'Submit' button

I'm trying to insert records into DB using AJAX. I'm not sure why, but it seems the javascript function referenced in the onclick tag of the submit button gets fired twice, and hence I get two records in my DB per click.
Placing alerts in the JS, I have managed to figure out that the problem is in the JS function getting called twice, and not the PHP script making two inserts. So, I'm not posting the PHP script, unless asked.
Here's the HTML for the form:
<form id="notify" method="post" action="add_notify.php">
Name: <input type="text" class="formname" name="name" value="" size="20"/>
Email: <input type="text" class="formname" name="email" value="" size="20"/>
<input type="submit" class="sendform" name="submit" onclick="processInfo()" value="Go!"/>
</form>
Javascript:
$("document").ready(function() {
$("#notify").submit(function() {
processInfo();
return false;
});
});
function processInfo()
{
var errors = false;
// Validate name
var name = $("#notify [name='name']").val();
if (!name) {
errors = true;
document.getElementById('name_error').innerHTML = 'You must enter a name.';
}
var email = $("#notify [name='email']").val();
if (!email)
{
errors = true;
document.getElementById('email_error').innerHTML = 'You must enter an email.';
}
else
{
var validEmail = true;
validEmail = validateEmail(email);
if (!validEmail)
{
errors = true;
document.getElementById('email_error').innerHTML = 'You must enter a valid email address.';
}
}
if (!errors)
{
$("#notify").ajaxSubmit({success:showResult});
return false;
}
}

You are calling processInfo twice once in submit handler and once in click handler. This might be the reason.
Here onclick="processInfo()" and inside
$("#notify").submit(function() {
processInfo();
return false;
});

processInfo() is called twice, both here, when the form submits:
$("#notify").submit(function() {
processInfo();
return false;
});
and here, when you click the submit button:
<input type="submit" class="sendform" name="submit" onclick="processInfo()" value="Go!"/>
You should remove one of them.

You are calling the processInfo() function twice: once on the form submit event, and once on the onclick on the input.
You should only attach the processInfo() function on the submit event. Remove the onlick dom0 event handler (inline scripts are to be avoided).
Also, do not use return false; as it prevents event bubbling. Use ev.preventDefault() instead.
$("document").ready(function() {
$("#notify").submit(function(ev) {
ev.preventDefault();
processInfo();
});
});

how do i stop a form submit with jQuery

I have this form here and i dont want them to go to the next page without certain selections
<form method="post" action="step2/" id="form1">
....
....
....
<input type="submit" class="submit notext" value="Next" />
and here is my jquery
$('.submit').click(function(e) {
var business = $(".business_type_select").find('.container strong').text();
alert(business);
if(business == "Select Business Type"){
alert("BusinessBusinessBusiness");
e.preventDefault;
return false;
}
});
any ideas what i am missing to get this to stop submitting

Try using the submit event:
$("#formID").submit(function(e) {
var business = $(".business_type_select").find('.container strong').text();
alert(business);
if(business == "Select Business Type"){
alert("BusinessBusinessBusiness");
return false;
}
});
Also, the e.preventDefault() is a function, but is redundant as the return false will work just the same.

preventDefault is a function - use e.preventDefault().

There are sometimes issues with .preventDefault() in IE try adding this:
if (e.preventDefault) // checks to see if the event has a preventDefault method
e.preventDefault();
else
e.returnValue = false;

$("#formID").submit(function(e) {
var business = $(".business_type_select").find('.container strong').text();
alert(business);
if(business == "Select Business Type"){
alert("BusinessBusinessBusiness");
e.preventDefault();
return false;
}
});

If your asp.net MVC razor form looks something like this:-
You can use (document) ID to validate form values using JavaScript. JavaScript validations fire prior to validations done using HTML Helpers ( #ValidationFor etc)..
#using (Html.BeginForm("MyRequestAction", "Home", FormMethod.Post))
{
#Html.ValidationSummary(true)
code goes here...
}
$(document).submit(function (e) {
var catVal = $("#Category").val();
if (catVal == "") {
alert("Please select Category!");
return false;
}
if (catVal == "--Select One--") {
alert("Please select Category!");
return false;
}
});