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How to show multiple select options when user select multiple options and when unselect it still hide and reset!!!?? jquery

I have select options contains languages, it's supposedly that user choose multiple options (languages) or an option (language), and i want user when choose an option (language), new select option shows, and contains his level in that language.
when user select multiple languages (english, arabic, france), three select option show, his level in these language, and when unselect any options, it's supposed to, the select option (that contains his level in that language) become hidden and reset (return to default select (first option)).
but i've some problems in my code
1- when user select multiple options, multiple select options that contains his level don't show all at once.
2- when user unselect an option it stills show and not reset (return to default select (first option))?!!
could you help me please
my view blade with script:
#extends('layouts.app')
#section('content')
<form>
<div class="form-row">
<div class="form-group col-md-6">
<label for="languages">Languages</label>
<select id="languages" class="form-control" multiple>
<option>Choose Language...</option>
<option value="1">English</option>
<option value="2">Arabic</option>
<option value="3">France</option>
<option value="4">Espanole</option>
</select>
</div>
</div>
<div id="arabicShow" style="display: none" class="form-row">
<div id="" class="form-group col-md-6">
<label for="arabic">Arabic level</label>
<select id="arabic" class="form-control">
<option value='' selected>Choose Your level...</option>
<option value='' >a</option>
<option value=''>b</option>
</select>
</div>
</div>
<div id="englishShow" style="display: none" class="form-row">
<div class="form-group col-md-6">
<label for="english">English level</label>
<select class="form-control">
<option value=''>Choose Your level...</option>
<option value='' >a</option>
<option value=''>b</option>
</select>
</div>
</div>
<div id="franceShow" style="display: none" class="form-row">
<div class="form-group col-md-6">
<label for="france">France level</label>
<select class="form-control">
<option value=''>Choose Your level...</option>
<option value='' >a</option>
<option value=''>b</option>
</select>
</div>
</div>
<button type="submit" class="btn btn-primary">Save</button>
</form>
#stop
#section('script')
<script type="text/javascript">
$(document).ready(function (){
$( "#languages option:first-child" ).attr("disabled","disabled");
$( "#arabic option:first-child" ).attr("disabled","disabled");
$( "#english option:first-child" ).attr("disabled","disabled");
$( "#france option:first-child" ).attr("disabled","disabled");
$('#languages').change(function(){
var text = $(this).find("option:selected").text().trim(); //get text
if(text === "Arabic"){
$('#arabicShow').show();
}else if(text === "English"){
$('#englishShow').show();
}else if(text === "France"){
$('#franceShow').show();
}else {
$('#arabicShow').hide();
$('#englishShow').hide();//hide
}
});
});
</script>
#stop

You can use .each loop to iterate through all selected options and then depending on condition show require select-boxes.
Demo Code :
$(document).ready(function() {
$("#languages option:first-child").attr("disabled", "disabled");
$("#arabic option:first-child").attr("disabled", "disabled");
$("#english option:first-child").attr("disabled", "disabled");
$("#france option:first-child").attr("disabled", "disabled");
$('.selects').hide(); //hide all
$('#languages').change(function() {
$('.selects select:not(:visible)').val(""); //reset
$('.selects').hide(); //hide all
//loop through all selected options..
$(this).find("option:selected").each(function() {
var text = $(this).text()
if (text === "Arabic") {
$('#arabicShow').show();
} else if (text === "English") {
$('#englishShow').show();
} else if (text === "France") {
$('#franceShow').show();
}
})
});
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.0/jquery.min.js"></script>
<form>
<div class="form-row">
<div class="form-group col-md-6">
<label for="languages">Languages</label>
<select id="languages" class="form-control" multiple>
<option>Choose Language...</option>
<option value="1">English</option>
<option value="2">Arabic</option>
<option value="3">France</option>
</select>
</div>
</div>
<!--added one common class i.e : selects-->
<div id="arabicShow" class="form-row selects">
<div id="" class="form-group col-md-6">
<label for="arabic">Arabic level</label>
<select id="arabic" class="form-control">
<option value='' selected>Choose Your level...</option>
<option value=''>a</option>
<option value=''>b</option>
</select>
</div>
</div>
<div id="englishShow" class="form-row selects">
<div class="form-group col-md-6">
<label for="english">English level</label>
<select class="form-control">
<option value=''>Choose Your level...</option>
<option value=''>a</option>
<option value=''>b</option>
</select>
</div>
</div>
<div id="franceShow" class="form-row selects">
<div class="form-group col-md-6">
<label for="france">France level</label>
<select class="form-control">
<option value=''>Choose Your level...</option>
<option value=''>a</option>
<option value=''>b</option>
</select>
</div>
</div>
<button type="submit" class="btn btn-primary">Save</button>
</form>

html with several drop downs each with its own show/hide textarea

I have html with several drop downs. Depending on the each selection a textarea shows for description. Right now I have a show and hide in javascript for each question. Is there a way to concise this so that I dont have to write show/hide for each question. What I mean is, Is there a way that my javascript will be more concise?
<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>Food Selection</title>
<link rel="stylesheet" href="https://www.w3schools.com/w3css/3/w3.css">
<script type="text/javascript" src="http://code.jquery.com/jquery.min.js"></script>
<script type="text/javascript">
$(document).ready(function() {
$('#spicyFoodField').on('change', function() {
if (this.value == 'spicyFoodDesc') {
$("#spicyFoodDesc").show();
} else {
$("#spicyFoodDesc").hide();
}
});
});
$(document).ready(function() {
$('#sweetFoodField').on('change', function() {
if (this.value == 'sweetFoodDesc') {
$("#sweetFoodDesc").show();
} else {
$("#sweetFoodDesc").hide();
}
});
});
$(document).ready(function() {
$('#blandFoodField').on('change', function() {
if (this.value == 'blandFoodDesc') {
$("#blandFoodDesc").show();
} else {
$("#blandFoodDesc").hide();
}
});
});
</script>
</head>
<body>
<div class="w3-row-padding" id="spicyFood">
<div class="w3-third">
<label class="w3-text-green" for="spicyFoodLabel"><b>Do you like spicy food?</b></label>
<p>
<select id="spicyFoodField">
<option value="" disabled selected>Select...</option>
<option value="spicyFoodDesc">Yes</option>
<option value="no">No</option>
</select>
</p>
</div>
<div class="w3-twothird">
<p>
<textarea class="w3-hover-light-blue" id="spicyFoodDesc" name="spicyFoodDesc" rows="2" hidden> </textarea>
</p>
</div>
</div>
<div class="w3-row-padding" id="sweetFood">
<div class="w3-third">
<label class="w3-text-green" for="spicyFoodLabel"><b>Do you like sweet food?</b></label>
<p>
<select id="sweetFoodField">
<option value="" disabled selected>Select...</option>
<option value="sweetFoodDesc">Yes</option>
<option value="no">No</option>
</select>
</p>
</div>
<div class="w3-twothird">
<p>
<textarea class="w3-hover-light-blue" id="sweetFoodDesc" name="sweetFoodDesc" rows="2" hidden> </textarea>
</p>
</div>
</div>
<div class="w3-row-padding" id="sweetFood">
<div class="w3-third">
<label class="w3-text-green" for="blandFoodLabel"><b>Do you like sweet food?</b></label>
<p>
<select id="blandFoodField">
<option value="" disabled selected>Select...</option>
<option value="blandFoodDesc">Yes</option>
<option value="no">No</option>
</select>
</p>
</div>
<div class="w3-twothird">
<p>
<textarea class="w3-hover-light-blue" id="blandFoodDesc" name="blandFoodDesc" rows="2" hidden> </textarea>
</p>
</div>
</div>
</body>
</html>

There is certainly a way to achieve what you're after, and my preference is to use a combination of one event listener, and data attributes.
The idea is that you apply one event that fires on the change of any select, rather than having one for each.
$("select").on("change", ...);
To find out exactly which one changed, you can use $(this). Therefore, $(this).val() will tell us if the dropdown is switching to "yes" or "no".
var selectedValue = $(this).val();
We can add the parameter data-for-id to each description, and set it to the ID of the associated select. For example, if you have a select with an id of mySelect, the textarea would have data-for-id="mySelect".
<select id="spicyFoodField">
....
</select>
<textarea data-for-id="spicyFoodField" />
Now we've created a link between our select and its textarea. Let's implement that in our jQuery code, so that when the select gets changed, it knows what textarea to look for:
//Set the associated text area to whatever textarea has
//the same data-for-id as the changing select list
var $associatedTextarea = $("textarea[data-for-id=" + $(this).attr("id") + "]");
Finally, we can implement our logic to hide the area, or show the area:
if (selectedValue == "yes") {
$associatedTextarea.show();
} else {
$associatedTextarea.hide();
}
Now, any time we want to add a new Select / Textarea, all we have to do is put data-for-id="associated-select-id" on the textarea, and the code will handle the rest.
Complete example:
$(document).ready(function() {
$("select").on("change", function() { //When a select changes
var selectedValue = $(this).val(); //Check its new value
//Get associated textarea
var $associatedTextarea = $("textarea[data-for-id=" + $(this).attr("id") + "]");
if (selectedValue == "yes") {
$associatedTextarea.show();
} else {
$associatedTextarea.hide();
}
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<link rel="stylesheet" href="https://www.w3schools.com/w3css/3/w3.css">
<script type="text/javascript" src="http://code.jquery.com/jquery.min.js"></script>
<div class="w3-row-padding" id="spicyFood">
<div class="w3-third">
<label class="w3-text-green" for="spicyFoodLabel"><b>Do you like spicy food?</b></label>
<p>
<select id="spicyFoodField">
<option value="" disabled selected>Select...</option>
<option value="yes">Yes</option>
<option value="no">No</option>
</select>
</p>
</div>
<div class="w3-twothird">
<p>
<textarea class="w3-hover-light-blue" data-for-id="spicyFoodField" id="spicyFoodDesc" name="spicyFoodDesc" rows="2" hidden> </textarea>
</p>
</div>
</div>
<div class="w3-row-padding" id="sweetFood">
<div class="w3-third">
<label class="w3-text-green" for="spicyFoodLabel"><b>Do you like sweet food?</b></label>
<p>
<select id="sweetFoodField">
<option value="" disabled selected>Select...</option>
<option value="yes">Yes</option>
<option value="no">No</option>
</select>
</p>
</div>
<div class="w3-twothird">
<p>
<textarea class="w3-hover-light-blue" data-for-id="sweetFoodField" id="sweetFoodDesc" name="sweetFoodDesc" rows="2" hidden> </textarea>
</p>
</div>
</div>
<div class="w3-row-padding" id="sweetFood">
<div class="w3-third">
<label class="w3-text-green" for="blandFoodLabel"><b>Do you like sweet food?</b></label>
<p>
<select id="blandFoodField">
<option value="" disabled selected>Select...</option>
<option value="yes">Yes</option>
<option value="no">No</option>
</select>
</p>
</div>
<div class="w3-twothird">
<p>
<textarea class="w3-hover-light-blue" data-for-id="blandFoodField" id="blandFoodDesc" name="blandFoodDesc" rows="2" hidden> </textarea>
</p>
</div>
</div>

How to add <div> in <form> on button click html and jquery

I want to add the following div structure whenever the '+' button [the addMore() function] is clicked. Although i am able to add the div structure, but the alignment of the input text are not equal as compared to the hard coded.
html file:
<form class="align-center">
<p class="6u 12u$(medium)">
Start Date: <input type="date" name="startdate" id="startdate" />
End Date: <input type="date" name="enddate" id="enddate" />
</p>
<p>
<div class="6u$ 12u$(xsmall)"><input type="text" name="numParticipants" id="numParticipants" value="" placeholder="Number of Participants"/></div>
</p>
<p>
<div class="row">
<div class="3u 12u$(medium)">
<div class="select-wrapper">
<select>
<option value="">-Select Programme-</option>
<option value="1">Yogalates</option>
<option value="2">Pilates</option>
<option value="3">Kick Boxing</option>
<option value="4">K-Pop Dance</option>
<option value="5">Hip Hop</option>
<option value="6">Jazz Aerobics</option>
<option value="7">Zumba</option>
<option value="8">Fitball</option>
</select>
</div>
</div>
<div>OR</div>
<div class="3u 12u$(medium)">
<div class="12u$">
<input type="text" value="" placeholder="Customize your own programme" />
</div>
</div>
<div class="2u 12u$(medium)">
<div class="12u$">
<input type="text" value="" placeholder="Venue" />
</div>
</div>
</div>
</p>
<p>
<div class="row" id="newProg">
</div>
<div class="row">
<div class="2u 12u$(medium)">
<a class="button" onclick="addMore()"><div style="font-size: 35px">+</div></a>
<a class="button" style="margin:0 0 0 1em" onclick="removeProg()"><div style="font-size: 35px">-</div></a>
</div>
</div>
<div class="2u 12u$(medium); image right">
Submit
</div>
</p>
</form>
main.js
var counter = 0;
function addMore() {
counter++;
var objNewDiv = document.createElement('div');
objNewDiv.setAttribute('id', 'addProg' + counter);
objNewDiv.setAttribute('class', 'row');
objNewDiv.innerHTML = '<div class="5u 12u$(medium)"> <div class="select-wrapper"> <select> <option value="">-Select Programme-</option> <option value="1">Yogalates</option> <option value="2">Pilates</option> <option value="3">Kick Boxing</option> <option value="4">K-Pop Dance</option> <option value="5">Hip Hop</option> <option value="6">Jazz Aerobics</option> <option value="7">Zumba</option> <option value="8">Fitball</option> </select> </div> </div> <div>OR</div> <div class="5u 12u$(medium)"> <input type="text" value="" placeholder="Customize your own programme"/> </div> <div class="3u$ 12u$(medium)"> <input type="text" value="" placeholder="Venue" /> </div> ';
document.getElementById('newProg').appendChild(objNewDiv);
}
Result when page is loaded:
when page loaded
Actual and Expected result:
actual and expected outcome

You have differenc in the class names of the div tags which you are appending in jquery.
Make it same as the Static HTML content, And the expected result will be achieved.
Differences I see is as below.
Static HTML has - <div class="3u 12u$(medium)"> ,Your Jquery HTML has - <div class="5u 12u$(medium)">
Static HTML has - <div class="3u 12u$(medium)">, Your jquery HTML has - <div class="5u 12u$(medium)">
Static HTml has - <div class="2u$ 12u$(medium)">, Your Jquery HTML has <div class="3u$ 12u$(medium)">
Because of the differences in the class names you find the differences in the way its rendered in the UI.

You missed one of your divs in JavaScript inner HTML string. I think it should be like this:
objNewDiv.innerHTML = '<div class="5u 12u$(medium)"> <div class="select-wrapper"> <select> <option value="">-Select Programme-</option> <option value="1">Yogalates</option> <option value="2">Pilates</option> <option value="3">Kick Boxing</option> <option value="4">K-Pop Dance</option> <option value="5">Hip Hop</option> <option value="6">Jazz Aerobics</option> <option value="7">Zumba</option> <option value="8">Fitball</option> </select> </div> </div> <div>OR</div> <div class="5u 12u$(medium)"> <div class="12u$"> <input type="text" value="" placeholder="Customize your own programme"/> </div> </div> <div class="3u$ 12u$(medium)"> <div class="12u$"> <input type="text" value="" placeholder="Venue" /> </div> </div> ';

POSTING form contents using AJAX/JSON/JAVASCRIPT to a PHP script

I've been looking around for an explanation on how to do this for a while but haven't found a decent explanation yet, so apologies if this is a repeat.
I don't have any problem retrieving JSON using GET but I'm confused as to how to use POST to send JSON and have it interpreted at the far end by a PHP script
I'm trying to do this on localhost for now.
Form is as follows:
<div class="row">
<div class="col-sm-2 spacer"> </div>
<div class="col-sm-8 topSpaceNeeded"><h4>Select Currencies to Exchange</h4></div>
<div class="col-sm-2 spacer"> </div>
</div>
<div class="row">
<div class="col-sm-1"> </div>
<div class="col-sm-10">
<form id="formSendDataWithAjax" method="POST" action="./postedJsonData">
<div id="formSection1">
<div class="row">
<div class="col-sm-12"> </div>
</div>
<div class="row">
<div class="col-sm-6">
<div class="form-group">
<label for="userId">User ID</label>
<select class="form-control" id="userId" name="userId">
<option value="123456">123456</option>
<option value="654321">654321</option>
<option value="134256">134256</option>
<option value="652431">652431</option>
</select>
</div>
</div>
<div class="col-sm-6">
<div class="form-group">
<label for="originatingCountry" id="countryLabel">Country of Origin</label>
<select class="form-control" id="originatingCountry" name="originatingCountry">
<option value="IE">IRELAND</option>
<option value="EN">ENGLAND</option>
<option value="FR">FRANCE</option>
<option value="PL">POLAND</option>
</select>
</div>
</div>
</div>
<div class="row">
<div class="col-sm-6">
<div class="form-group">
<label for="currencyFrom">Base Currency</label>
<select class="form-control" id="currencyFrom" name="currencyFrom" >
<option value="AUD">AUD</OPTION>
<option value="CAD">CAD</OPTION>
<option value="CHF">CHF</OPTION>
<option value="CZK">CZK</OPTION>
<option value="DKK">DKK</OPTION>
<option value="EUR" SELECTED>EUR</OPTION>
<option value="GBP">GBP</OPTION>
<option value="HKD">HKD</OPTION>
<option value="HUF">HUF</OPTION>
<option value="NOK">NOK</OPTION>
<option value="NZD">NZD</OPTION>
<option value="PLN">PLN</OPTION>
<option value="SEK">SEK</OPTION>
<option value="USD">USD</OPTION>
<option value="ZAR">ZAR</OPTION>
</select>
</div>
</div>
<div class="col-sm-6">
<div class="form-group">
<label for="currencyTo">Buy Currency</label>
<select class="form-control" id="currencyTo" name="currencyTo">
<option value="AUD">AUD</OPTION>
<option value="CAD">CAD</OPTION>
<option value="CHF">CHF</OPTION>
<option value="DKK">DKK</OPTION>
<option value="EUR" SELECTED>EUR</OPTION>
<option value="GBP">GBP</OPTION>
<option value="HKD">HKD</OPTION>
<option value="HUF">HUF</OPTION>
<option value="NOK">NOK</OPTION>
<option value="NZD">NZD</OPTION>
<option value="PLN">PLN</OPTION>
<option value="SEK">SEK</OPTION>
<option value="USD">USD</OPTION>
<option value="ZAR">ZAR</OPTION>
</select>
</div>
</div>
</div>
<div class="row">
<div class="col-sm-12"> </div>
</div>
</div>
<div id="formSection2">
<div class="row">
<div class="col-sm-12"> </div>
</div>
<div class="row">
<div class="col-sm-4"> </div>
<div class="col-sm-4">
<div class="form-group">
<label for="rate" id="rateLabel"> </label>
<input type="hidden" id="rate" name="rate" value="" >
</div>
</div>
<div class="col-sm-4"> </div>
</div>
<div class="row">
<div class="col-sm-6">
<div class="form-group">
<label for="amountSell">You Sell:</label>
<input type="number" class="form-control" step="0.10" id="amountSell" name="amountSell" value="1.00" >
</div>
</div>
<div class="col-sm-6">
<div class="form-group">
<label for="amountBuy">You Buy:</label>
<input type="number" class="form-control" step="0.01" id="amountBuy" name="amountBuy" value="1.00" >
</div>
</div>
</div>
<div class="row">
<div class="col-sm-12"> </div>
</div>
<div class="row">
<div class="col-sm-4"> </div>
<div class="col-sm-4">
<input type="submit" id="transfer" class="btn btn-primary btn-block" id="transfer" name="transfer" value="TRANSFER NOW">
</div>
<div class="col-sm-4"> </div>
</div>
</div>
</form>
</div>
<div class="col-sm-1"> </div>
</div>
I know it's probably easier to use JQuery, but Javascript is what I know so I'd like to stick with that if possible.
The Javascript is as follows:
document.getElementById('formSendDataWithAjax').onsubmit =submitDataWithAjax;
function submitDataWithAjax(e)
{
// intercept form submission by preventing the script from following the url of the form
e.preventDefault();
var f = e.target,
formData= new FormData(f),
xhr = new XMLHttpRequest();
xhr.open("POST", f.action);
xhr.setRequestHeader("Content-Type","application/json; charset=utf-8");
xhr.send(formData);
}
What I believe this script should do is prevent the postedJsonData page from loading when the form is submitted. Instead, the data is converted to JSON and should then be sent via AJAX to the postedJsonData PHP script
If this is correct, how do I get postedJsonData script to listen for the data?
Is it enough to do this to extract it to an array?
$dataArr = file_get_contents("php://input");

jQuery is much easier, I'd highly recommend it.
To use jQuery, just include this at the top of your page:
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.4/jquery.min.js"></script>
Then, to do AJAX/JSON/PHP requests, replace what you currently have in your Javascript file with:
$(document).ready(function() {
$("#formSendDataWithAjax").submit(function() { //Whenever form with ID="formSendDataWithAjax" is submitted
$.ajax({ //Make AJAX POST call
type: "POST", //POST, instead of GET
url: "postedJsonData.php", //Location of PHP script
dataType: "JSON", //JSON
data: {
userid: $("#userId").val(), //These values will be JSON-encoded automatically
country: $("#originatingCountry").val(), //Magically JSON-encoded
etc.
}
}).done(function(returnValue) { //returnValue could be any JSON string: "{ "result" : "success" }, { "result" : "error" }, etc.
alert("Your PHP script returned this value: "+returnValue);
});
}
return false;
}
Then in your PHP script, simply calling $_POST['userid'] or $_POST['country'] will give you the value POSTed by the AJAX call. E.g.
<?php
$userid = (int) $_POST['userid'];
$country = $_POST['country'];
//Do stuff
?>

How to show an entire div on select

I need some help displaying a div with a form inside of it whenever someone selects a certain option from a tag. My code is this:
<script type="text/javascript">
$(function() {
$('#contactOptionSelect').change(function() {
$('.emailForm').hide();
$('#' + $(this).val()).show();
});
});
</script>
<div class="contactSelect" id="contactOptionSelect">
<label for="selectContact">Contact us: </label>
<select name="selectContact" class="selectContactType" style="width: 150px;"/>
<option class="opt" value="">Please select</option>
<option class="opt" id="helpOpt" value="">Help and Support</option>
<option class="opt" id="emailOpt" value="">Email</option>
<option class="opt" id="visitOpt" value="">Visit us!</option>
<option class="opt" id="phoneOpt" value="">Phone</option>
</select>
</div>
<div class="emailForm" id="emailFormId">
<form id="contactUsForm" method="post" action="">
<div class="formSubject">
<label for="inputSubject">Subject</label>
<input type="text" width="50px" id="inputSubject" />
</div>
<div class="formBody">
<label for="inputBody">Email</label>
<textarea rows="15" cols="50" id="inputBody"></textarea>
</div>
<div class="formSubmit">
<input type="submit" id="inputSubmit" value="Send!"/>
</div>
</form>
</div>
And I want to display the last form when the email option is selected. I kinda want it to work like this: http://www.apple.com/privacy/contact/ High standards I know but whatever haha Thanks in advance for any help!

Are you looking for something like this? http://jsbin.com/okakuy/edit#javascript,html
Whenever the select option is changed, we hide whichever div is visible, and show whichever div has the current select value as its id attribute.
$("#parts").on("change", function(o){
$(".panels")
.find("> div:visible")
.slideUp()
.end()
.find("#" + o.target.value)
.slideDown();
});
Coupled with this markup:
<select id="parts">
<option>foo1</option>
<option>foo2</option>
<option>foo3</option>
</select>
<div class="panels">
<div id="foo1">This is foo1</div>
<div id="foo2">This is foo2</div>
<div id="foo3">This is foo3</div>
</div>