Develop Reference

How to concatenate form array inputs before submission?

Example code:
<form method="get">
<input type="checkbox" name="anythingOne[]" value='one'> <!-- checked -->
<input type="checkbox" name="anythingOne[]" value='two'>
<input type="checkbox" name="anythingOne[]" value='three'> <!-- checked -->
<input type="checkbox" name="otherThingTwo[]" value='Forty'>
<input type="checkbox" name="otherThingTwo[]" value='Fifty'> <!-- checked -->
</form>
On form submission the URL should look like:
http://some-website.tld/action?anythingOne=one,three&otherThingTwo=Fifty
What I am observing now is,
http://some-website.tld/action?anythingOne=one&anythingOne=three&otherThingTwo=Fifty
The serialize() or serializeArray() is not working in this case. Any ideas?

You could grab the result of .serializeArray and transform it into the desired format:
$(function() {
$('form').on('submit', function(e) {
e.preventDefault();
var data = $(this).serializeArray();
var dataByKey = data
.reduce((result, entry) => {
var name = entry.name.replace(/\[\]$/, '');
(result[name] || (result[name] = [])).push(entry.value);
return result;
}, {});
Object.keys(dataByKey)
.forEach((key, _) => dataByKey[key] = dataByKey[key].join(','));
console.log(dataByKey);
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form method="get">
<fieldset>
<input type="checkbox" name="anythingOne[]" value='one'>1
<input type="checkbox" name="anythingOne[]" value='two'>2
<input type="checkbox" name="anythingOne[]" value='three'>3
</fieldset>
<fieldset>
<input type="checkbox" name="otherThingTwo[]" value='Forty'>40
<input type="checkbox" name="otherThingTwo[]" value='Fifty'>50
</fieldset>
<input type="submit" />
</form>

If you want, you can also use pure javascript without jQuery to get all the checked checkboxes' value, http://jsfiddle.net/jx76dpkh/1/
<form id="myForm" method="get">
<input type="checkbox" name="anythingOne[]" value='one'>1
<input type="checkbox" name="anythingOne[]" value='two'>2
<input type="checkbox" name="anythingOne[]" value='three'>3
<input type="checkbox" name="otherThingTwo[]" value='Forty'>40
<input type="checkbox" name="otherThingTwo[]" value='Fifty'>50
<input type="submit" />
</form>
JS:
const myForm = document.getElementById('myForm');
myForm.addEventListener('submit', (e) => {
e.preventDefault();
let checkboxes = Array.from(myForm.querySelectorAll('input[type="checkbox"]:checked');// build the array like element list to an array
let anythingOne = checkboxes.filter( box => box.name === 'anythingOne[]').map(item => item.value);
let otherThingTwo = checkboxes.filter( box => box.name === 'otherThingTwo[]').map(item => item.value);
});

In case, you are allowed to change html, here is a solution using hidden fields.
function updateChecks() {
$.each(['anythingOne', 'otherThingTwo'], function(i, field) {
var values = $('input[type=checkbox][data-for=' + field + ']:checked').map(function() {
return this.value;
}).get().join(',');
$('input[type=hidden][name=' + field + ']').val(values);
});
}
$(function() {
$('form').on('submit', function(e) {
updateChecks();
});
updateChecks();
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form method="get">
<input type="hidden" name="anythingOne" value='' />
<input type="hidden" name="otherThingTwo" value='' />
<input type="checkbox" data-for="anythingOne" value='one' checked='' />
<input type="checkbox" data-for="anythingOne" value='two' />
<input type="checkbox" data-for="anythingOne" value='three' checked='' />
<input type="checkbox" data-for="otherThingTwo" value='Forty' />
<input type="checkbox" data-for="otherThingTwo" value='Fifty' checked='' />
</form>

You could get query string parameters using by serializeArray() method. Then use reduce() to group parameter values by name, and map() to get array of key-value pairs. Then it is possible to concatenate the pairs separated by & using join() method. For example the following snippet creates a target URL using actual value of the form action (current URL by default) and values of checked checkboxes:
$('form').submit(function() {
var queryString = $(this).serializeArray()
.reduce(function(transformed, current) {
var existing = transformed.find(function(param) {
return param.name === current.name;
});
if (existing)
existing.value += (',' + current.value);
else
transformed.push(current);
return transformed;
}, [])
.map(function(param) {
return param.name + '=' + param.value;
})
.join('&');
var action = $(this).prop('action');
var delimiter = (~action.indexOf('?')) ? '&' : '?';
$(this).prop('action', action + delimiter + queryString);
// Only for display result. Remove on real page.
var url = $(this).prop('action');
console.log(url);
return false;
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form method="GET">
<input type="checkbox" name="anythingOne" value='one'>
<input type="checkbox" name="anythingOne" value='two'>
<input type="checkbox" name="anythingOne" value='three'>
<input type="checkbox" name="otherThingTwo" value='Forty'>
<input type="checkbox" name="otherThingTwo" value='Fifty'>
<button type="submit">Show target URL</button>
</form>
The latest 3 lines are used only to prevent the form sending and display resulted URL.
Also it is possible to solve the question using only serialize() mathod and regular expressions, but it requires lookbehind assertion support in browsers.

You can collect all the checked boxer and join the different parts of the strings.This may not be the most neat or efficient solution, but it works. I used a button to trigger the concatenation. See my comments within the code.
$(document).ready(function(){
$("button").click(function(){
/* concatenate anythingOne form*/
//collect anythingOne input
var joined_serialized = []
var anythingOne = [];
$.each($("input[name='anythingOne[]']:checked"), function(){
anythingOne.push($(this).val());
});
//join otherThingTwo input
var anythingOne_serialized = "";
if(anythingOne.length > 0){ //only collect if checked
anythingOne_serialized = "anythingOne=" + anythingOne.join(",");
joined_serialized.push(anythingOne_serialized)
}
/* concatenate otherThingTwo form*/
//collect otherThingTwo input
var otherThingTwo = []
$.each($("input[name='otherThingTwo[]']:checked"), function(){
otherThingTwo.push($(this).val());
});
//join otherThingTwo input
var otherThingTwo_serialized = "";
if(otherThingTwo.length > 0){ //only collect if checked
otherThingTwo_serialized = "otherThingTwo=" + otherThingTwo.join(",");
joined_serialized.push(otherThingTwo_serialized)
}
/*join different form names*/
var joined_serialized = joined_serialized.join("&")
if(joined_serialized.length == 1){ //remove last & if only one form is checked
joined_serialized = joined_serialized.slice(0, -1)
}
/*concatenated forms with website*/
var result = "http://some-website.tld/action?"+joined_serialized
console.log(result) //E.g. when Two, Three and Forty are checked: http://some-website.tld/action?anythingOne=two,three&otherThingTwo=Forty
})
})
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form method="get">
<input type="checkbox" name="anythingOne[]" value='one'> <!-- checked -->
<input type="checkbox" name="anythingOne[]" value='two'>
<input type="checkbox" name="anythingOne[]" value='three'> <!-- checked -->
<input type="checkbox" name="otherThingTwo[]" value='Forty'>
<input type="checkbox" name="otherThingTwo[]" value='Fifty'> <!-- checked -->
</form>
<button>submit<button/>

if statement using jquery selectors and checkboxes

I have a form with two text input fields and a series of checkboxes.
There is a variable fields which stores some arrays with data pertaining to the selected fields. I have hardcoded the values into the script with no problem but I cannot seem to find out how to properly compose an if statement to check the status of the checkboxes and only use those values, rather than hardcoding the selected fields.
var start, end, fields;
$(function() {
$("#form1").submit(function(event) {
var endD = $("#endDate").val();
end = endD;
var startD = $("#startDate").val();
start = startD;
//fields = ['PM1','PM2.5','PM10'];
//if $("#PM1").is("checked"))){
//fields = ["PM1"];
//}
if ($("PM1").attr("checked")) {
fields = ["PM1"];
}
event.preventDefault();
build_graph();
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form id="form1">
Start Datetime:<br>
<input type="text" name="startDate" id="startDate" class="Date" placeholder="YYYYMMDD-HHMM"><br> End Datetime <br>
<input type="text" name="startDate" id="endDate" class="Date" placeholder="YYYYMMDD-HHMM"><br> Parameter
<br>
<input type="checkbox" class="parameter" id="PM1">PM1<br>
<input type="checkbox" class="parameter" id="PM2.5" checked>PM2.5<br>
<input type="checkbox" class="parameter" id="PM10">PM10<br>
<input type="checkbox" class="parameter" id="Temp">Temperature<br>
<input type="checkbox" class="parameter" id="Humidity">Humidity<br>
<input type="checkbox" class="parameter" id="Pressure">Pressure<br>
<input type="checkbox" class="parameter" id="WindSpeed">Wind Speed<br>
<input type="checkbox" class="parameter" id="Direction">Direction<br>
<input type="checkbox" class="parameter" id="RainVolume">Rain Volume<br>
<input type="submit">
</form>

You can select only the checked checkbox, using a JQuery selector :
$('.myCheckboxs:checked')
this will give you only the checked one.

with jQuery you can properly check if a checkbox is checked like:
if($('#mycheckbox').prop("checked")){
// it´s checked
}
my tip, use this function that serializes your form into an object
$.fn.serializeObject = function()
{
var o = {};
var a = this.serializeArray();
$.each(a, function() {
if (o[this.name] !== undefined) {
if (!o[this.name].push) {
o[this.name] = [o[this.name]];
}
o[this.name].push(this.value || '');
} else {
o[this.name] = this.value || '';
}
});
return o;
};
you can then serialize your form like this:
fields = $("#form1").serializeObject()
all input values and checkboxes that are checked will occur as property

jquery add / remove item from array

I have a checkboxs 3-4 of them, when the user checks the checkbox I want to add the value of the checkbox to the array, if they uncheck the box I want to remove the item from the array, this is what I got so far:
$('ul.dropdown-menu input[type=checkbox]').each(function () {
$(this).change(function () {
if ($(this).attr("id") == 'price') {
if (this.checked) {
priceArray.push($(this).val());
}
else {
priceArray = jQuery.grep(priceArray, function (value) {
return value != $(this).val();
});
}
}
});
});
Adding the value to the array works perfectly, however removing items results in this error:
Cannot read property 'toLowerCase' of undefined
on this line:
return value != $(this).val();

Run the code snippet and check
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script>
var priceArray=[];
$(document).ready(function(){
$('input[type=checkbox]').each(function () {
$(this).change(function () {
if (this.checked) {
priceArray.push($(this).val());
$("#displayarray").html("array=[" + priceArray+"]");
}
else {
var index = priceArray.indexOf($(this).val());
if (index > -1) {
priceArray.splice(index, 1);
}
$("#displayarray").html("array=[" + priceArray+"]");
}
});
});
});
</script>
<input type="checkbox" value="box1"/>box1
<input type="checkbox" value="box2"/>box2
<input type="checkbox" value="box3"/>box3
<input type="checkbox" value="box4"/>box4
<br/>
<div id="displayarray"></div>

Replace
priceArray = jQuery.grep(priceArray, function (value) {
return value != $(this).val();
});
By
val = $(this).val();
priceArray = jQuery.grep(priceArray, function (value) {
return value != val;
});
Don't forget the scope where your are in the callback function.

You can try using filter instead of $.grep:
var values = [];
$("input").on("change", function()
{
var $this = $(this);
if ($this.is(":checked"))
{
values.push($this.val());
}
else
{
values = values.filter(x => x != $this.val());
}
console.log(values);
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input type="checkbox" value="1" />
<input type="checkbox" value="2" />
<input type="checkbox" value="3" />
<input type="checkbox" value="4" />
<input type="checkbox" value="5" />
<input type="checkbox" value="6" />
<input type="checkbox" value="7" />
filter() is a native function, I prefer using built-in function rather than 3rd party's, IMO. Also, avoid binding events within loops like this:
$('ul.dropdown-menu input[type=checkbox]').each(function () {
$(this).change(function () {
Use this method:
$('ul.dropdown-menu').on('change', 'input[type=checkbox]', function() { ...
This will work even if checkbox is dynamically added.

You could do this very cleanly with a functional style
<div class="checkboxes">
<input type="checkbox" value="1" />
<input type="checkbox" value="2" />
</div>
And
(function() {
$(".checkboxes input[type=checkbox]").on("click", function() {
var x = $(".checkboxes input[type=checkbox]:checked").map(function(a,b) {
return parseFloat(b.value);
}).toArray();
console.log(x)
});
})();

I had a similar situation and I was able to overcome it in the following way :
My jQuery :
$(document).ready(function(){
$("#dataFilterForm").on("input", function() {
var values = '';
var boxes = $('input[name=vehicle]:checked');
boxes.each(function(b){
values = values + boxes[b].id + ', ';
});
$('#filterResult').text(values.substring(0, values.length-2));
});
});
My HTML :
<form id="dataFilterForm">
<input type="checkbox" id="Filter1" name="vehicle" value="Bike">
<label for="Filter1">Filter1</label><br>
<input type="checkbox" id="Filter2" name="vehicle" value="Car">
<label for="Filter2">Filter2</label><br>
<input type="checkbox" id="Filter3" name="vehicle" value="Boat">
<label for="Filter3">Filter3</label><br>
</form>
<p>Result : </p>
<p id="filterResult"></p>

Javascript: How to check if each input value is duplicated to another input value

So i have a dynamic input field came from append with different class name and names, i want to check each of input field value already exist or duplicate.
This would look like
The first criteria_name is default and the others are appendend.
<input type="text" name="criteria_name" class="criteria_name">
<input type="text" name="criteria_name2" class="criteria_name2">
<input type="text" name="criteria_name3" class="criteria_name3">
<input type="text" name="criteria_name4" class="criteria_name4">
<input type="text" name="criteria_name5" class="criteria_name5">
I am trying to check each one of those if there is no duplicated else proceed.
var critname_arr = [];
var input_check;
var crit_name_of_first = $('input.criteriaNames').val();
var acappended = append_crit_header+1;
var count_to = 0;
for(var ab = 2; ab<=acappended; ab++){
var crit_arr;
if(crit_name_of_first == $('input.criteria_each_name'+ab+'').val()){
alert("Criteria cannot be duplicate");
return false;
}else{
input_check = $('input.criteria_each_name'+ab);
input_check.each(function(){
crit_arr = $.trim($(this).val());
});
critname_arr.push(crit_arr);
}
if($('input.criteria_each_name'+ab+'').val() == critname_arr[count_to]){
alert('criteria cannot be duplicate');
return false;
}
count_to++;
}
console.log(critname_arr);

Here is just an example of how you can do it. In the fiddle change one of the values to one that is already in another field (make a duplicate value) to see it do something. If there are no duplicates, it will not do anything. Click the "Button" text to run the duplicate check:
jsFiddle: https://jsfiddle.net/o52gjj0u/
<script>
$(document).ready(function(){
$('.ter').click(function(e) {
var stored = [];
var inputs = $('.criteria_name');
$.each(inputs,function(k,v){
var getVal = $(v).val();
if(stored.indexOf(getVal) != -1)
$(v).fadeOut();
else
stored.push($(v).val());
});
});
});
</script>
<!-- Just use an array name for the input name and same class name as well -->
<div class="ter">Button</div>
<input type="text" name="criteria_name[]" class="criteria_name" value="1" />
<input type="text" name="criteria_name[]" class="criteria_name" value="2" />
<input type="text" name="criteria_name[]" class="criteria_name" value="3" />
<input type="text" name="criteria_name[]" class="criteria_name" value="4" />
<input type="text" name="criteria_name[]" class="criteria_name" value="5" />

Add the sum of from the value select of radiobutton

For instance, radiobutton one = value 1, radiobutton two = value 2.
Here is the code I have:
Script file:
<script type="text/javascript">
$(document).ready(function () {
$("div[data-role='footer']").prepend('Back');
$(".Next").click(function () {
$.mobile.changePage("#" + $("#Answer").val());
});
$("input[type=radio]").click(function () {
var answer = $(this).val();
$("#Answer").val(answer);
});
$('.Answer').live("click", function () {
var NextQuestionID = $(this).attr('NextQuestionId');
if (NextQuestionID == '') {
location.href = "/Surveys/Index";
}
$("#survey").load('/Questions/GetQuestion', { Id: NextQuestionID }, function () {
$('#answerInput').textinput();
$(".Answer").button();
});
});
});
and here is my markup:
<input type="radio" name="Answer" id="radio-choice-1" value="Question2" />
<input id="Answer" class="Answer" type="hidden" value="first" />
<div class="innerspacer">
Next
</div>
How do I assign the radio button as value from 1 to 4 and sum up the value for all the question?

There is a lot going on in your question and it is unclear what you want. I'm taking a guess and assuming you have a say 5 radio buttons and you want the 5th radio button value to be the sum of the other 4 values. Is that correct?
Here is an example of doing that: jsfiddle
HTML:
<div id="container">
<label>
<input type="radio" name="something" value="1">
A?
</label>
<label>
<input type="radio" name="something" value="3">
B?
</label>
<label>
<input type="radio" name="something" value="5">
C?
</label>
<label>
<input type="radio" name="something" value="">
All?
</label>
</div>
JavaScript:
$(document).ready(function() {
var choices = $('input[name="something"]');
var total = 0;
choices.each(function() {
var choice = $(this);
var value = parseInt(choice.val(), 10);
if (!isNaN(value)) {
total += value;
}
});
choices.filter(':last').val(total);
});
You will need to adapt this to your HTML.