Develop Reference

How do I hide the select tag based on Js iteration of a list

I had a challenge getting this question but tried to research and redo it.
I'm trying to get an item in a list from a controller, then iterate through the list. Based on the content of the array, I would like to show or hide the select that has options in it. I can't seem to hide or show any of them at the moment.
var names = ['marketing']; //or ['business']
var text = "";
var i;
//$(document).ready(function() {
for (i = 0; i < names.length; i++) {
if (names[i] === 'business') {
//alert('Hooray');
$("#business").show("slow");
$(".marketing").hide("fast");
} else
if (names[i] === 'marketing') {
$("#marketing").show("slow");
$(".marketing").hide("fast");
}
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="all" id="note">
Some content will be posted here...
</div>
<select id="marketing" multiple>
<option value="1">Definition</option>
<option value="2">Advertise</option>
<option value="3">Promotion</option>
</select>
<select id="business" multiple>
<option value="1">Definition</option>
<option value="2">Buy</option>
<option value="3">Sell</option>
</select>

If your array contains the exact name of the id you can "hide" the elements with CSS and show them with two lines of javascript
var names = ['marketing'];//or ['business']
names.forEach( name => {
$('#' + name).show('slow')
});
select {
display: none;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="all" id="note">
Some content will be posted here...
</div>
<select id="marketing" multiple>
<option value="1">Definition</option>
<option value="2">Advertise</option>
<option value="3">Promotion</option>
</select>
<select id="business" multiple>
<option value="1">Definition</option>
<option value="2">Buy</option>
<option value="3">Sell</option>
</select>

How can I pass a value from input field to a select option using jquery?

I'm using the following code to pass a value from a select option to a given input field.
$(".itemconditionmenu").change(function() {
var conditionofitem = $(this).val();
$("#meta_itemcondition").val(conditionofitem);
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<select id="itemcondition" class="itemconditionmenu">
<option value="">Choose Condition</option>
<option value="New">New</option>
<option value="Used">Used</option>
</select>
<input id="meta_itemcondition" type="text" value="New">
But how can I pass the value of the input field back to the select option value using jQuery?

I am not sure what you are exactly looking, however, as per my understanding I have modifed your code samples.. You can check below snippet.
$( document ).ready(function() {
var conditionofitem = $("#meta_itemcondition").val();
$(".itemconditionmenu").val(conditionofitem);
});
$(".itemconditionmenu").change(function() {
var conditionofitem = $(this).val();
if(conditionofitem == '') {
$("#meta_itemcondition").val('Choose Condition');
} else {
$("#meta_itemcondition").val(conditionofitem);
}
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<select id="itemcondition" class="itemconditionmenu">
<option value="">Choose Condition</option>
<option value="New">New</option>
<option value="Used">Used</option>
</select>
<input id="meta_itemcondition" type="text" value="New">
Please check and let me know if you have any further queries.

Try this
$("#addOption").click(function(){
$("#itemconditionmenu").append('<option value="'+$("#meta_itemcondition").val()+'" selected="selected">'+$("#meta_itemcondition").val()+'</option>');
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<select id="itemconditionmenu">
<option value="1">1</option>
<option value="2">2</option>
</select>
<input id="meta_itemcondition" type="text" value=""></input>
<button id="addOption">ADD</button>

Example for the same: Blur out your input and value option will be added to select dropdown
$(".itemconditionmenu").change(function() {
var conditionofitem = $(this).val();
$("#meta_itemcondition").val(conditionofitem);
});
$("#meta_itemcondition").blur(function() {
var inputValue = $(this).val();
var o = new Option(inputValue, inputValue);
$(o).html(inputValue);
$("#itemcondition").append(o);
$("#itemcondition").val(inputValue);
});
$( document ).ready(function() {
var value = $("#meta_itemcondition").val();
console.log(value)
var alreadyOption = false;
$("#itemcondition option").each(function()
{
alreadyOption = $(this).val() === value;
if(alreadyOption) {
$("#itemcondition").val(value);
}
});
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
<select id="itemcondition" class="itemconditionmenu">
<option value="">Choose Condition</option>
<option value="New">New</option>
<option value="Used">Used</option>
</select>
<input id="meta_itemcondition" type="text" value="New"/>

Here you can find inline functionality
if you enter a value in textbox value append in drop-down
if you select drop-down value auto set in textbox.
Note: add value in textbox change just input focus
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<select class="jsSelect" onchange="$('.jsTextBox').val($(this).val())">
<option value="1">1</option>
<option value="2">2</option>
</select>
<input class="jsTextBox" onchange="if($(this).val()!=''){$('.jsSelect').append($('<option></option>').attr('value',$(this).val()).text($(this).val()));$('.jsSelect').val($(this).val());}" type="text" value="">

How to get multiple values from an HTML <select> element

How to take the values of value1 and value2 in two variables using javascript?
<select class="form-control" id="country" name="country">
<option value="**value1**" "**value2**" >Select Item</option>
</select>

You could make your own attribute. I know you probably do not want to get the element with an ID, but I don't know the context. You can just call getAttribute on the option and use any name you gave to the "custom" attribute.
window.addEventListener('load', ()=>
{
const option = document.getElementById('option');
function init()
{
//Use this to get the values
console.log(option.getAttribute('other-value'));
}
init();
});
<select class="form-control" id="country" name="country">
<option id="option" value="value1" other-value="value2">Select Item</option>
</select>

I don't know what you really want to do with your piece of code,
but here is a proper way to use the option elements, and a way to split multiple values with a fixed separator:
var example = document.getElementById('example');
example.addEventListener('change', function() {
// Console displays the “value”, and not the text, of the selected option
console.log("option value:", example.value);
});
// Here is what I'll do with your "multiple" values
var country = document.getElementById('country');
var options = country.querySelector('option');
var values = options.value.split("/");
values.forEach(function(val) {
country.innerHTML += "<option value=" + val + ">" + val + "</option>";
});
<p>My simple example</p>
<select id="example" name="country">
<option value="--">Select Country</option>
<option value="GB">Great Britain</option>
<option value="FR">France</option>
</select>
<br>
<br>
<p>Example with option getting splitted</p>
<select class="form-control" id="country" name="country">
<!-- Let's say your multiple values are separated by a "/" -->
<option value="**value1**/**value2**">Select Item</option>
</select>
Hope it helps.

$('select').on('change', function() {
console.log( $('#country').val() );
console.log($(this).find(':selected').data('second'));
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<select class="form-control" id="country" name="country">
<option value="value1" data-second ="value2" >Select Item 1</option>
<option value="value3" data-second ="value4" >Select Item 2</option>
</select>

How to count the number of Form selects that have had values changes in Jquery/Javascript

I have several selects in my form. If one select has had its options changed then it should increase the counter. 5 selects then counter should be 5. Essentially I want to check if all my selects have been selected so I can submit the form. I don't want to use "required".
<div id="firstPanelID"
<div class="form-group input-group">
<label class="fixingLabelAlignmentInner">Transfer Code of Center from which Infant Transferred : </label>
<div class="fixingInputAlignmentInner">
<select id="transferCodePIW" name=transferCodePIW class="form-control" style="height:32px;width:80%;">
<option disabled selected value>SELECT</option>
<option value="13240">13240 - Mowbray Maternity Hospital</option>
<option value="14994">14994 - New Somerset Hospital</option>
<option value="16011">16011 - Tygerberg Hospital</option>
<option value="8005432">8005432 - Khayelitsha District Hospital</option>
<option value="8005433">8005433 - Michell's Plain District Hospital</option>
<option value="8005435">8005435 - Red Cross Children's Hospital</option>
<option value="97777777">97777777 - Birth at Home or in Transit</option>
<option value="">Other</option>
<option value="77777777">N/A</option>
<option value="99999999">Unknown</option>
</select>
</div>
</div>
</div>
I have tried it with the following. The selects may be visible/invisible due to other radio buttons hence the visible. The function works for radio buttons but I can't get it to work for selects.
var sgroups = [];
$('#firstPanelID select:visible:selected').each(function(index, el){
var i;
for(i = 0; i < sgroups.length; i++)
if(sgroups[i] == $(el).attr('name'))
return true;
sgroups.push($(el).attr('name'));
}
);
alert(($('#firstPanelID select:visible:selected').length))

I think the code is self-explanatory.
var counter = 0;
$('select').change(function () {
var o = $(this);
if (!o.hasClass('counted')) {
counter++;
o.addClass('counted');
}
$('#counter').text(counter);
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<select>
<option value="aa">aa</option>
<option value="bb">bb</option>
<option value="cc">cc</option>
</select>
<select>
<option value="2aa">2aa</option>
<option value="2bb">2bb</option>
<option value="2cc">2cc</option>
</select>
<select>
<option value="3aa">3aa</option>
<option value="3bb">3bb</option>
<option value="3cc">3cc</option>
</select>
<div id="counter">
0
</div>

If you want to check if all selects have been checked, assuming each select will have an empty value, you can do this:
function isThereAnyEmptySelection () {
let r = false;
$('select').each(function () {
if ($(this).val() === '') { // or === null, or === undefined, or === '0' etc., depending on context
r = true;
}
});
return r;
}

You can use .one() to attach a single change event to each <select> element, when count is equal to $("selector").length call .off() to remove change event, then perform action, for example, submit <form> element.
let count = 0;
$("select").one("change", function() {
++count;
console.log(count);
if (count === $("select").length) {
$("select").off("change");
// submit form here
console.log(count + " is " + $("select").length)
}
})
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<select>
<option value="1">1</option>
<option value="2">2</option>
</select>
<select>
<option value="1">1</option>
<option value="2">2</option>
</select>
<select>
<option value="1">1</option>
<option value="2">2</option>
</select>
<select>
<option value="1">1</option>
<option value="2">2</option>
</select>
<select>
<option value="1">1</option>
<option value="2">2</option>
</select>

select 2 + get value on click

I am facing a issue that I want the select value on click event. i tried with change event but I get all values comma separated instead of current value.
What I want to do is, Suppose there are multiple options with a All option. So if a user select All option then it should clear all selected option and only All option will display.
I have tried below codes
$(".chzn-select").on('select2:selecting', function () {
var st = ($(this).select2('val'));
}
it show null on first click.
And
$(".chzn-select").on('change', function () {
var st = ($(this).select2('val'));
}
show all values in comma separated format. There is no example I found of onclick event with select2 JS. Here is the list of events
HTML
<select name="country[]" multiple="" data-placeholder="Select country" class="form-control chzn-select" required="required" id="country">
<option disabled="disabled" value="1">Abu Dhabi</option>
<option value="2">Dubai</option>
<option disabled="disabled" value="3">Singapore</option>
<option disabled="disabled" value="4">Thailand</option>
<option value="8">Afghanistan</option>
<option value="All">All</option>
</select>
Here is the jsfiddle

https://jsfiddle.net/bayahiassem/gtew005w/11/
$(".chzn-select").select2({selectOnClose: true}).on("select2:selecting", function(evt) {
if(evt.params.args.data.id == 'All') {
$(".chzn-select").val(null).trigger("change");
} else {
$('.chzn-select > option[value=All]').prop("selected", false);
}
});

I didn't get you.
If i correct.
$(this).select2('val').find(':selected');

Here you are. It will you give the current selected item(s) - hold ctrl for multiple selections
$(function () {
$(".chzn-select").on('change', function (evt) {
$('#selected').text('Selected: ' + ($(this).val()))
})
})
select {
width: 50%;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<select name="country[]" multiple="" data-placeholder="Select country" class="form-control chzn-select" required="required" id="country">
<option disabled="disabled" value="1">Abu Dhabi</option>
<option value="2">Dubai</option>
<option disabled="disabled" value="3">Singapore</option>
<option disabled="disabled" value="4">Thailand</option>
<option value="8">Afghanistan</option>
<option value="All">All</option>
</select>
<div id="selected"></div>

I hope this will work,
$(".chzn-select").select2({selectOnClose: true});
$(".chzn-select").on("select2:select", function (evt) {
if($.inArray('All',$(this).val()) != -1){
$(this).val('All').trigger("change");
}
});
Replace your js code with this, it will work.
Here is jsfiddle link for working code.