If was not alert go to url else do not go - javascript

I want make validation jquery without using from plugin, problem is here that after click on button and get alert(if field is empty) it go to url # that there is in <form action="#"....
I want if get alert(mean if field is empty) 'input is empty' not go to url that there is in ...action="#"..., if filed has value it go to url. i can not use from ajax call or preventDefault or window.location(Because one from field is input:file).
Example: http://jsfiddle.net/gb7nh/1/
How can fix it?
<form action="#" method="POST">
<input type="text" name="name">
<button id="cli">Submit</button>
</form>
$('#cli').live('click',function(e){
//e.preventDefault();
if($('input[type="text"]').val()=='')alert('input is empty')
})

Bind to form submittal instead, and return false to prevent the form from submitting.
<form action="#" method="POST" id="myform">
<input type="text" name="name">
<button id="cli">Submit</button>
</form>
$('#myform').submit(function() {
var valid = true;
$('input[type="text"]').each(function() {
if ($(this).val().length == 0) {
alert('A field is empty!');
valid = false;
return false;
}
});
if (!valid) {
return false;
}
});

This should do the trick for you:
<button id="cli" onclick="return clickButton();">Submit</button>
And it's corresponding JavaScript
function clickButton(){
if($('input[type="text"]').val()==''){
alert('input is empty');
return false;
}
}

Probably you need to return false in case when you show alert woth errors:
$('#cli').live('click',function(e){
//e.preventDefault();
if($('input[type="text"]').val()=='')
{
alert('input is empty');
return false;
}
});
Code: http://jsfiddle.net/gb7nh/2/

I wolud do it like Elliot. Only i would have used:
<form action="#" method="POST" id="myform">
<input type="text" name="name">
<button id="cli">Submit</button>
</form>
$('#myform').submit(function() {
if (!$('input[type="text"]').val()) {
alert('input is empty');
return false;
}
});
This.
if (!$('input[type="text"]').val())
Instead of:
if ($('input[type="text"]').val()=='')

Related

Jquery: On form submit validate then allow default operation to continue

Wondering, is there a way to make a form execute default operation after preventingDefault and validating form fields.
$('#form').submit(function (e) {
e.preventDefault();
var isValid = true;
var name = $('#name').val();
if (empty(name)) {
isValid = false;
}
$(this).submit() // This will cause a stack overflow :)
});
After I complete the form validation I want to proceed as normal,
I thought of using onClick on the submit button, but users can trigger submit by hitting on the enter key, which I want to allow. Reason why I want to do this is so that the server can perform its operations like redirecting.
I am writing you a small example.
$(document).ready(function(){
$("#control_form").on("keyup", function(event){
post_control();
});
});
var post_control = function(){
var user_name = $("#user_name").val();
if ( user_name==null || user_name=="" || user_name.length < 4 )
$('.error').html("Username can not be less than 4 characters!");
else
{
$('.error').empty();
$('#control_form').removeAttr('onsubmit');
}
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.0.2/jquery.min.js"></script>
<div id="users_form">
<form name="form" id="control_form" action="post_form" method="post" onsubmit="return false;">
<label>User Name:</label>
<input type="text" id="user_name" name="user_name">
<input type="submit" value="Save">
</form>
<div class="error"></div>
</div>
Instead of using preventDefault, you can return true at the end of the function.
If you want to prevent the submission, you can return false.
Here's an example using your code. If you try to submit the form with an empty field, it won't submit. If you fill the field, it will:
$("#form").submit(function() {
var name = $("#name").val();
if (!name) {
$(".form-group").addClass("has-danger");
alert("Field is blank. Submit will be prevented.");
return false; // no submission
}
alert("Field is filled. The form will submit.");
return true; // form submits
});
<link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.0.0-alpha.6/css/bootstrap.min.css" rel="stylesheet" />
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form id='form'>
<div class="form-group">
<label class="form-control-label" for="name">Name</label>
<input type="text" class="form-control" id="name">
</div>
<button type="submit" class="btn btn-primary">Submit</button>
</form>
CodePen Demo
check this it works.I tested it.
$(document).ready(function(){
$('#form1').submit(function (e) {
if($('#name').val() == ''){
alert('Name is empty');
return false;
}
$(this).submit();
});
});

Submit a form if the statement is true

I am trying to write a very simple jQuery function which will have two main properties. The first one will be to check if the field is empty or not. The second one will be if the field is not empty to execute a form which will lead to a PHP coded page. I am very new to jQuery and I will be very grateful if someone can point where exactly is my mistake. Thank you in advance.
function Captcha() {
$('#Button').click(function() {
if ($("#Field").val().length == 0) {
alert("Please fill the box");
return false;
} else {
alert("Your code is saved");
return true;
}
});
}
$(document).ready(function() {
Captcha();
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form action="success.php" id="Alpha" method="post" onsubmit="return Captcha();">
<input id="Field" type="text" placeholder="Enter key here">
<button id="Button" type="submit" form="Alpha">Confirm</button>
</form>
Don't work with the button's click event, work with the form's submit event because a form can be submitted via the keyboard and therefore the button can be circumvented.
You can see a working version here (Stack Overflow prevents submit code from working in the snippet environment below.)
$(function() {
$('#Alpha').on("submit", function() {
if ($("#Field").val().length == 0) {
alert("Please fill the box");
return false;
} else {
alert("Your code is saved");
return true;
}
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form action="success.php" id="Alpha" method="post" onsubmit="return Captcha();">
<input id="Field" type="text" placeholder="Enter key here">
<button id="Button" type="submit" form="Alpha">Confirm</button>
</form>
You would want to validate the form fields when you actually submit the form. When you click on the button you are still in the process of triggering the submit.
Try changing this:
$('#Button').click(function() {
Into this:
$('#Alpha').on('submit', function() {
See if that helps.

how to validate array input field using javascript

How to validate array input field?Please help me to solve this issue.
<form action="" method="post" name="frmPayPal1" id="frmPayPal1" onsubmit="return validateForm()"/>
<input type='text' name='txt_jobid[]' id='txt_jobid' >
<input type="submit" value="submit"/>
</form>
<script>
function validate(job)
{
if(job.elements['txt_jobid[]'].length == 0)
{
alert(" Please Enter Value!");
return false;
}
}
</script>
Maybe this...
<form action="" method="post" name="frmPayPal1" id="frmPayPal1">
<input type="text" name="txt_jobid[]" id="txt_jobid">
<input type="submit" value="submit">
</form>
<script>
$(document).ready(function(){
$('#frmPayPal1').on('submit', function(){
var lngtxt=($(this).find('input[name="txt_jobid[]"]').val()).length;
console.log(lngtxt);
if (lngtxt==0){
alert('please enter value');
return false;
}else{
//submit
}
});
});
</script>
You need to pass this
onsubmit="return validateForm(this)"
Also, return true if validation succeeds
function validate(job)
{
if(job.elements['txt_jobid[]'].length == 0)
{
alert(" Please Enter Value!");
return false;
}
return true;
}
function validateForm(){
if((document.getElementById("txt_jobid").value).length == 0){
alert(" Please Enter Value!");
return false;
}
}
<form action="" method="post" name="frmPayPal1" id="frmPayPal1" onsubmit="return validateForm()">
<input type='text' name='txt_jobid[]' id='txt_jobid'>
<input type="submit" value="submit"/>
</form>
Please let me know if you have any query.
here the solution of input type array. I have already post the solution on stackoverflow . please the below link.
https://stackoverflow.com/a/48092147/8189107
here the js fiddle link. you can see it's working here
https://jsfiddle.net/q0d76aqx/42/

Validate on submit button got issue

Here is my code example
<form action="next2.php" method="post" name="next2" id="next2" onsubmit="return submitForm();">
Below is my function
<script type="text/javascript">
function submitForm()
{
var name = document.getElementById("name").value;
return false;
}
</script>
On press, the form still submit, but if i change
onsubmit="return false;"
then the form won't submit, how do I use the function to return false as i need do some if else validation
<script type="text/javascript">
function submitForm() {
return false;
}
</script>
<form
action="next2.php"
method="post"
name="next2"
id="next2"
onsubmit="return submitForm();"
>
submit is already a function for the form, you should call your JavaScript function something different, for instance submitForm as in the above.
just remove the semicolon in your function and place a alert in your function to make sure whether the function is called first.and then try to add validation
I like to make an invisible button for the actual submit which is only triggered after form validation:
function validate() {
var valid = true;
$.each($('input'), function(){
valid = valid && $(this).val().length > 0;
})
if (valid) {
$('#realSubmit').click();
} else {
alert('Please fill out all fields!');
}
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form action="next2.php" method="post" name="next2" id="next2" onsubmit="return submit();">
<input type="text" placeholder="Enter Name" />
<input type="password" placeholder="Enter Password" />
<button type="button" onclick="validate()">Submit</button>
<button type="submit" id="realSubmit" style="display:none"></button>
</form>

Html form submit Check string

Need to setup an HTML Form, if entered value match given value then ACTION1 else ACTION2
i have 2 pages m1.htm & m2.htm, my value is 12345, if form submit 12345 open m1.htm if wrong open m2.htm.
<form name="input" action="m1.htm" method="post">
<input type="text" name="q"><input type='submit' value='Search'/>
try this
<form name="input" action="" method="post">
<input type="text" name="q">
<input type='submit' value='Search' id='search'/>
<script>
$(document).ready(function(){
$("#search").click(function(){
if($("input[name='q']").val() == 12345){
document.forms[0].action="m1.html";
document.forms[0].submit();
return true;
}else{
document.forms[0].action="m2.html";
document.forms[0].submit();
return true;
}
});
});
</script>
http://jsfiddle.net/6ftjhm88/
You should try to do it yourself first then ask the question not just ask for the code.
Code Snippet:
<form name="input" action="m1.htm" method="post">
<input type="text" name="q"><input type='submit' value='Search' id='submit'/>
</form>
<script>
$(document).ready(function()
{
$('#submit').on('click', function(e)
{
e.preventDefault();
e.stopPropagation();
if($('input[type="text"][name="q"]').val() == "")
{
alert('Please Enter a Value!');
return false;
}else if($('input[type="text"][name="q"]').val() == "12345")
{
window.location.href = 'm1.htm';
}else {
window.location.href = 'm2.htm';
}
});
});
</script>
Just use location.replace() function to load your html file according to your condition
i.e
if(value=12345)
location.replace('/m1.htm')
else
location.replace('/m2.html')

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