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onclick radio button change form fields

I have two radio button like:
Field_One
Field_Two
When I check Field_One it will show First_Name, Last_Name field but when I check Field_Two it will show reference_id field.
But one thing if this reference_id comes from url
like myurl.com?reference_id=12345 then the radio field will auto selected and only reference field will show on form list.
My problem is when reference_id found on url Field_Two not showing it always showing Field_One on load found
Here is my snippet:
$(document).ready(function () {
$('input[type="radio"]').click(function () {
if ($(this).attr("value") == "Field_One") {
$(".Field_One").show();
$(".Field_Two").hide();
}
if ($(this).attr("value") == "Field_Two") {
$(".Field_Two").show();
$(".Field_One").hide();
}
});
$('input[type="radio"]').trigger('click'); // trigger the event
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<input type="radio" name="myfield" value="Field_One" checked/> Field_One
<input type="radio" name="myfield" value="Field_Two" /> Field_Two
<div class="Field_One">
<input type="text" name="first_name" placeholder="First Name" />
<br><br>
<input type="text" name="last_name" placeholder="Last Name"/>
</div>
<br>
<br>
<div class="Field_Two">
<input type="text" name="reference_no" placeholder="reference_no" />
</div>

try this:
$(document).ready(function () {
$('input[type="radio"]').click(function () {
if ($(this).attr("value") == "Field_One") {
$(".Field_One").show();
$(".Field_Two").hide();
}
if ($(this).attr("value") == "Field_Two") {
$(".Field_Two").show();
$(".Field_One").hide();
}
});
//$('input[type="radio"]').trigger('click'); // trigger the event
let url = new URL(window.location.href);
let reference_id = url.searchParams.get("reference_id");
if (reference_id == null) {
$(".Field_One").show();
$(".Field_Two").hide();
}else{
$(".Field_Two").show();
$(".Field_One").hide();
$(".Field_Two").find('input[name="reference_no"]').val(reference_id);
}
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<input type="radio" name="myfield" value="Field_One" checked="true" /> Field_One
<input type="radio" name="myfield" value="Field_Two" /> Field_Two
<div class="Field_One">
<input type="text" name="first_name" placeholder="First Name" />
<br><br>
<input type="text" name="last_name" placeholder="Last Name" />
</div>
<br>
<br>
<div class="Field_Two">
<input type="text" name="reference_no" placeholder="reference_no" />
</div>

Enable submit button if atleast one field has filled value

Sorry this might be a duplicate Q , but could not find a direct solution easily,
I have gone through SO answer and found , enable submit if all values are filled ,
$(document).ready(function() {
$('.field input').keyup(function() {
var empty = false;
$('.field input').each(function() {
if ($(this).val().length == 0) {
empty = true;
}
});
if (empty) {
$('.actions input').attr('disabled', 'disabled');
} else {
$('.actions input').attr('disabled', false);
}
});
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class='form'>
<form>
<div class='field'>
<label for="username">Username</label>
<input id="username" type="text" />
</div>
<div class='field'>
<label for="password">Password</label>
<input id="password" type="password" />
</div>
<div class='actions'>
<input type="submit" value="Login" disabled="disabled" />
</div>
</form>
</div>
But how to achieve the same(enable submit) if atleast one field is non-empty

You can try this:
$(document).ready(function() {
$('.field input').keyup(function() {
var hasValue = $('#username,#password').filter((index, input) => input.value.length > 0).length;
$('.actions input').attr('disabled', hasValue ? false : 'disabled');
});
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class='form'>
<form>
<div class='field'>
<label for="username">Username</label>
<input id="username" type="text" />
</div>
<div class='field'>
<label for="password">Password</label>
<input id="password" type="password" />
</div>
<div class='actions'>
<input type="submit" value="Login" disabled="disabled" />
</div>
</form>
</div>
Update:
$('#username,#password').filter((index, input) => input.value.length > 0).length
This line means we will check the value of the 2 input elements username and password, if all of them don't have any value, the button will be disabled. If you want to check another input element before enabling/disabling, you can add:
$('#username,#password,#input_3,#input_4').filter(...).length
By this way, the button will be disabled when username, password, input_3 and input_4 elements don't have any value. Make sure you have a specific id for each input element.
Update 2:
Checking for both username and password have some value:
var hasValue = $('#username,#password').filter((index, input) => input.value.length > 0).length === 2
Checking for field, field4 and field5 have some value:
var hasValue = $('#field,#field4,#field5').filter((index, input) => input.value.length > 0).length === 3

Use jQuery props method.
$(document).ready(function() {
$(':input[type="submit"]').prop('disabled', true);
$('input').keyup(function() {
if($(this).val() != '') {
$(':input[type="submit"]').prop('disabled', false);
}else{
$(':input[type="submit"]').prop('disabled', true);
}
});
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class='form'>
<form>
<div class='field'>
<label for="username">Username</label>
<input id="username" type="text" />
</div>
<div class='field'>
<label for="password">Password</label>
<input id="password" type="password" />
</div>
<div class='actions'>
<input type="submit" value="Login" disabled="disabled" />
</div>
</form>
</div>

Another way to go about it:
Store the fields, and create a new collection of them each time a key is pressed, filtering each one by its value.
If the length of our empty fields is the same as the length of all fields, disable the button:
$(document).ready(function() {
var $fields = $('.field input');
$fields.keyup(function() {
var $emptyFields = $fields.filter(function(){
return !this.value;
});
$('.actions input').prop('disabled', $emptyFields.length === $fields.length);
});
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class='form'>
<form>
<div class='field'>
<label for="username">Username</label>
<input id="username" type="text" />
</div>
<div class='field'>
<label for="password">Password</label>
<input id="password" type="password" />
</div>
<div class='actions'>
<input type="submit" value="Login" disabled="disabled" />
</div>
</form>
</div>
Documentation:
.filter()
.prop()

You could with Jquery.map and Array.find
Jquery.map().get() is get all the input value length with condition.
Array.find will find the any one of the input as valid length of string
Then finally the result will be reversely compare prop('disabled', !filled)
$(document).ready(function() {
$('.field input').keyup(function() {
var res = $('.field input').map(function() {
return $(this).val().length != 0
}).get()
var filled = res.find(a=> a == true)
$('.actions input').prop('disabled', !filled);
});
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class='form'>
<form>
<div class='field'>
<label for="username">Username</label>
<input id="username" type="text" />
</div>
<div class='field'>
<label for="password">Password</label>
<input id="password" type="password" />
</div>
<div class='actions'>
<input type="submit" value="Login" disabled="disabled" />
</div>
</form>
</div>
Updated with select option
Required field based .Button only enabled after required field 1 and 3 both are filled
$(document).ready(function() {
$('.field input,.field select').on('keyup change',function() {
var res = $('.field input[required],.field select[required]').map(function() {
return $(this).val().trim().length != 0
}).get();
var filled = res.every(a => a == true)
$('.actions input').prop('disabled', !filled);
});
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class='form'>
<form>
<div class='field'>
<label for="username">Username *</label>
<input id="username" required type="text" />
</div>
<div class='field'>
<label for="password">Password</label>
<input id="password" type="password" />
</div>
<div class='field'>
<label for="password">email *</label>
<input id="password" required type="password" />
</div>
<div class='field'>
<label for="password">select email *</label>
<select required>
<option value="">Select</option>
<option value="1">one</option>
<option value="2">two</option>
</select>
</div>
<div class='actions'>
<input type="submit" value="Login" disabled="disabled" />
</div>
</form>
</div>

You can try this in a simple way, as shown below:
var filled = false;
$('.field input').each(function() {
if ($(this).val().length > 0) {
filled = true;
return; // just add return means break from loop whenever any field is filled.
}
});
if (filled) {
$('.actions input').attr('disabled', false);
} else {
$('.actions input').attr('disabled', 'disabled');
}
});

Prepending only if the div isn't showing?

Basically, I want to prepend a div only if the div I'm prepending isn't already showing.
$(".loginForm").submit(function() {
var username = $("input.username").val();
var password = $("input.password").val();
var errorvisible = $("body").has(".alert.error");
if (!username || !password && errorvisible == false) {
$('body').prepend("<div class=\"error alert\">One or more field(s), have been left empty</div>");
setTimeout(function() {
$('.error.alert').fadeOut('1000', function() {
$('.error.alert').remove();
});
}, 6000);
event.preventDefault();
}
});
At the moment, I'm trying to make it so the jquery will only do the if empty if statement if the error isn't currently visible however it's not working...
<div class="pageCont">
<div class="title">
<h1>LetsChat</h1>
<h4>The new way of interaction.</h4>
</div>
<div class="login box">
<form method="POST" action="#" class="loginForm">
<input type="text" class="loginInput username" placeholder="Aquinas Email or Number" /><br>
<input type="password" class="loginInput password" placeholder="Password" /><br>
<div class="checkBox">
<input type="checkbox" id="checkBoxLink">
<label for="checkBoxLink">Remember Me</label>
Forgotten your password?
</div>
<input type="submit" value="Submit" class="login btn green" />
<input type="reset" value="Clear Fields" class="reset btn green" />
</form>
</div>
<div class="signup box">
<form method="POST" action="#" class="signupForm">
<input type="text" class="signupInput" placeholder="First Name" /><br>
<input type="text" class="signupInput" placeholder="Last Name" /><br>
<input type="text" class="signupInput" placeholder="Aquinas Email" /><br>
<input type="password" class="signupInput" placeholder="Password" /><br>
<input type="submit" class="purple btn signup" value="Sign Up Today!">
</form>
</div>
</div>

The below should work if I'm understanding your question correctly?
$(".loginForm").submit(function() {
var username = $("input.username").val();
var password = $("input.password").val();
var errorvisible = $("body").has(".alert.error").length;
if (!username || !password)
{
if(errorvisible == 0)
$('body').prepend("<div class=\"error alert\">One or more field(s), have been left empty</div>");
setTimeout(function() {
$('.error.alert').fadeOut('1000', function() {
$('.error.alert').remove();
});
}, 6000);
event.preventDefault();
}
});

I have used this type of code many times:
if(!$('#myFancyDiv').is(':visible')) {
//prepend or do whatever you want here
}
BTW just for clarity, this code checks if 'myFancyDiv' is not visible.

You can check whether the .error.alert elements exists, if so don't do anything else create a new one
$(".loginForm").submit(function() {
var username = $("input.username").val();
var password = $("input.password").val();
var errorvisible = $("body").has(".alert.error");
if (!username || !password && errorvisible == false) {
if (!$('.error.alert').length) {
$('body').prepend("<div class=\"error alert\">One or more field(s), have been left empty</div>");
setTimeout(function() {
$('.error.alert').fadeOut('1000', function() {
$(this).remove();
});
}, 6000);
}
event.preventDefault();
}
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form method="POST" action="#" class="loginForm">
<input type="text" class="loginInput username" placeholder="Aquinas Email or Number" />
<br>
<input type="password" class="loginInput password" placeholder="Password" />
<br>
<div class="checkBox">
<input type="checkbox" id="checkBoxLink">
<label for="checkBoxLink">Remember Me</label>
Forgotten your password?
</div>
<input type="submit" value="Submit" class="login btn green" />
<input type="reset" value="Clear Fields" class="reset btn green" />
</form>

Finding which forms are filled out on submit

I need to use unobtrusive javascript/jquery to check if input fields have been filled out. If they are I need to display what input field that was. Not the value.
Here is the input form
<div class="inputCol">
<div class="formItem first-name">
<label>First Name:</label>
</div>
<div class="inputCol">
<input maxlength="40" size="35" id="firstName" name="firstName" class="imput_value" type="text" />
</div>
<div class="formItem last-name">
<label>Last Name:</label>
</div>
<div class="inputCol">
<input maxlength="40" size="35" id="lastName" name="lastName" class="imput_value" type="text" />
</div>
<div class="formItem email">
<label>Email:</label>
</div>
<div class="inputCol">
<input maxlength="40" size="35" id="email" name="email" class="imput_value" type="text" />
</div>
<div class="inputCol">
submit
</div>
So on click of the submit button I need it to alert "First Name, Email" if just the first name and email had input in them. These inputs do not need to be validated. As long as the field is not empty it should display that that input has been submitted.
This is the code I currently have, don't really know where to go from here:
$('a.submit_button').click(function(){
var validate= false;
$('input.imput_value').each(function(){
if($(this).val() != '' || $(this).attr('checked'))
validate = true;
});
if(validate){
var dataFilled = $(this).closest('.formItem').find('input').text().trim();
alert(dataFilled);
return false;
}
});

$('a.submit_button').click(function(){
var filledInputs = '';
$('input.imput_value').each(function(){
if($(this).val() !== '' || $(this).attr('checked')){
filledInputs += $(this).attr('name') + ', ';
}
});
if(filledInputs !== ''){
alert(filledInputs);
}
});
Should do what you want.

jQuery's val() returns empty string on bootstrap popover input field

I have a bootstrap popup form with a few input fields. I've added a submit button to the form, that triggers client-side JS validation. However, when the button is clicked, the current value of the input fields is not captured by jQuery's val() method: I just get an empty string.
Here is the markup:
<div class="popover fade right in" style="top: -154.5px; left: 249px; display: block;">
<div class="arrow">
</div>
<h3 class="popover-title">New Job Site contact</h3>
<div class="popover-content">
<form class="popover-form form-horizontal" id="newjobsite_contact_form" accept-charset="utf-8" method="post" action="http://dev.temperature/home/#">
<div class="form-group">
<div class=" required ">
<input type="text" class="form-control" id="popover-first_name" required="1" placeholder="First name" value="" name="first_name">
</div>
<div class=" required ">
<input type="text" class="form-control" required="1" placeholder="Surname" value="" name="surname">
</div>
<div class=" required ">
<input type="text" class="form-control" required="1" placeholder="Phone" value="" name="phone">
</div>
<div class="">
<input type="text" class="form-control" placeholder="Mobile" value="" name="mobile">
</div>
<div class="">
<input type="email" class="form-control" placeholder="Email" value="" name="email">
</div>
<div class="">
<input type="url" class="form-control" placeholder="Website" value="" name="website">
</div>
</div>
<div class="popover_buttons">
<button class="btn btn-success" onclick="submit_newjobsite_contact(); return false;" type="button" id="newjobsite_contact_submit">Submit</button>
<button class="btn btn-warning" onclick="close_newjobsite_contact(); return false;" type="button" id="newjobsite_contact_cancel">Cancel</button>
</div>
</form>
</div>
</div>
Here is the JS:
function submit_newjobsite_contact() {
errors_found = validate_popover_form($('#newjobsite_contact_form'));
if (errors_found.length == 0) {
// Form values submitted to PHP code through AJAX request here
} else {
error_msg = "Please check the following errors:\n";
$(errors_found).each(function(key, item) {
error_msg += "- "+item.message+"\n";
});
alert(error_msg);
}
}
function validate_popover_form(form_element) {
found_errors = [];
$('span.error').remove();
form_element.find('select,input').each(function(key, item) {
if ($(item).attr('required') && $(item).val().length == 0) {
found_error = true;
found_errors.push({elementname: $(item).attr('name'), message: "A value for "+$(item).attr('placeholder')+" is required"});
}
console.log($(item).val()); // More validation here, just putting debugging code instead
});
return found_errors;
}
What am I doing wrong? All other attributes for these input fields are being correctly retrieved by jQuery, just not the value after I've typed text into them.

The answer to this problem couldn't be found here because I didn't post the whole source JS, which is too large. What really happened is that I accidentally cloned the popover form, which led to a duplication of the input fields.

form_element.find('select,input').each(function(key, item) {
if ($(item).attr('required') && $(item).val().length == 0) {
found_error = true;
found_errors.push({elementname: $(item).attr('name'), message: "A value for "+$(item).attr('placeholder')+" is required"});
}
I Modified it to:
form_element.find('select,input').each(function(key, item) {
if ($(this).data('required') == '1' && $(this).val().length == 0) {
found_error = true;
found_errors.push({elementname: $(this).attr('name'), message: "A value for "+$(this).attr('placeholder')+" is required"});
}
Try using data attributes so instead of using required="1" use data-required="1"
<input type="text" class="form-control" required="1" placeholder="Surname" value="" name="surname">
so your input should be like this:
<input type="text" class="form-control" data-required="1" placeholder="Surname" value="" name="surname">