We Keep Coding

Reload select when choose select

I have 2 field select.
I want when a value is choose in the first one, the second select will reload and show some values that correspond to the first select.
Example :
States and city :
<select id="billing_state" data-placeholder="State / County">
<option value="">Select an option…</option>
<option value="CA" selected="selected">California</option>
<option value="TX">Texas</option>
</select>
When you choose California reload field select city.
<select id="billing_city" data-placeholder="City">
<option value="">Select an option…</option>
<option value="LA">Los Angeles</option>
<option value="SD">San Diego</option>
...
</select>
And when you choose Texas reload field select city.
<select id="billing_city" data-placeholder="City">
<option value="">Select an option…</option>
<option value="">Dallas</option>
<option value="HT">Houston</option>
...
</select>
I have tried to find some way. But not very effective. Maybe I have no knowledge about it. Can you help and give me an example on jsfiddle?
Thanks very much!
P/s: Oh .I came across it. It is currently visible and hidden when selected. I watched a similar post but was not feasible for my problem. I use wordpress. And the data fields are already available, I just want to reload it to show it. I choose new states but it does not reload the city. I refreshed the web page and it reloaded and displayed a new city field.

You can do something like this:
$('#billing_state').change(function() {
var countrycode = $(this).val();
if (countrycode != "") {
$('#billing_city option').hide();
$('#billing_city option:eq(0)').show();
$('#billing_city option[data-parent=' + countrycode + ']').show();
$('#billing_city').val("")
}
});
Note: I've added data-parent="CA" you the "City" options. Like:
<option data-parent="CA" value="LA">Los Angeles</option>
<option data-parent="CA" value="SD">San Diego</option>
<option data-parent="TX" value="DA">Dallas</option>
<option data-parent="TX" value="HT">Houston</option>
Demo
$('#billing_state').change(function() {
var countrycode = $(this).val();
if (countrycode != "") {
$('#billing_city option').hide();
$('#billing_city option:eq(0)').show();
$('#billing_city option[data-parent=' + countrycode + ']').show();
$('#billing_city').val("")
}
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<select id="billing_state" data-placeholder="State / County">
<option value="">Select an option…</option>
<option value="CA">California</option>
<option value="TX">Texas</option>
</select>
<select id="billing_city" data-placeholder="City">
<option value="">Select an option…</option>
<option data-parent="CA" value="LA">Los Angeles</option>
<option data-parent="CA" value="SD">San Diego</option>
<option data-parent="TX" value="DA">Dallas</option>
<option data-parent="TX" value="HT">Houston</option>
</select>

Please find link below:
https://jsfiddle.net/ulric_469/8Lk5w0xn/11/
<select id="billing_state" data-placeholder="State / County">
<option value="">Select an option…</option>
<option value="CA" selected="selected">California</option>
<option value="TX">Texas</option>
</select>
<div>
<select id="second_dropdown" data-placeholder="Please Select">
<option value="">Select an option…</option>
<option value="LA">Los Angeles</option>
<option value="SD">San Diego</option>
</select>
</div>
$("#billing_state").on("change", function(e) {
var currentVal = $(this).val();
if (currentVal === "CA") {
var optn = '<option value="">Select an option…</option><option value="LA">Los Angeles</option><option value="SD">San Diego</option>';
} else if (currentVal === "TX") {
var optn = '<option value="">Select an option…</option><option value="">Dallas</option><option value="HT">Houston</option>';
} else {
var optn = '<option value="">Select an option…</option>'
}
$("#second_dropdown option").remove();
$("#second_dropdown").append(optn);
})

'selected' attribute for options doesn't reset inside if else statement

I am trying to use an if else statement to add 'selected' to an option from the select menu. The only problem I have is that I'm not sure why once I go back to value 'top' option[1] is still 'selected'. It's like the first if doesn't execute the condition, although i see if i do the console log it does change to the first if...
<select id='selectdesign'>
<option value="0"></option>
<option value="top">top</option>
<option value="jeans">jeans</option>
</select>
<select id='selectmenu'>
<option value="0"></option>
<option value="1">top-blue</option>
<option value="2">top-pink</option>
<option value="3">bottoms-red</option>
<option value="4">bottoms-violet</option>
</select>
function selectOption(element) {
if (element.value == 'top') {
console.log('if');
option[2].setAttribute('selected', true);
} else if (element.value == 'jeans') {
console.log('else if');
option[1].setAttribute('selected', true);
}
}
i am calling the selectOption function on selectDesign on change

You need to access the right value of the select element, like
element.options[element.selectedIndex].value
and use
document.getElementById('selectmenu').selectedIndex = 1;
for setting an index of the options.
function selectOption(element) {
if (element.options[element.selectedIndex].value == 'top') {
document.getElementById('selectmenu').selectedIndex = 1;
} else if (element.options[element.selectedIndex].value == 'jeans') {
document.getElementById('selectmenu').selectedIndex = 3;
}
}
<select id="selectdesign" onchange="selectOption(this);">
<option value="0"></option>
<option value="top">top</option>
<option value="jeans">jeans</option>
</select>
<select id="selectmenu">
<option value="0"></option>
<option value="1">top-blue</option>
<option value="2">top-pink</option>
<option value="3">bottoms-red</option>
<option value="4">bottoms-violet</option>
</select>
Version with an object for preselecting options.
function selectOption(element) {
var indices = {
top: 1,
jeans: 3,
},
value = element.options[element.selectedIndex].value
if (value in indices) {
document.getElementById('selectmenu').selectedIndex = indices[value];
}
}
<select id="selectdesign" onchange="selectOption(this);">
<option value="0"></option>
<option value="top">top</option>
<option value="jeans">jeans</option>
</select>
<select id="selectmenu">
<option value="0"></option>
<option value="1">top-blue</option>
<option value="2">top-pink</option>
<option value="3">bottoms-red</option>
<option value="4">bottoms-violet</option>
</select>

JavaScript dependent

I have two drop downs dependent on each other.
When I'm selecting the FRUIT, I want to show only one Apple value from select2 and hide all the others but when I'm selecting Animal I want to show all the values
Please help me write the Javascript function.
Thanks.
<select name="select1" id="select1">
<option value="1">Fruit</option>
<option value="2">Animal</option>
<option value="3">Bird</option>
<option value="4">Car</option>
</select>
<select name="select2" id="select2">
<option value="1">Banana</option>
<option value="1">Apple</option>
<option value="1">Orange</option>
<option value="2">Wolf</option>
<option value="2">Fox</option>
<option value="2">Bear</option>
<option value="3">Eagle</option>
<option value="3">Hawk</option>
<option value="4">BWM<option>
</select>
//This is my java script function
function display(){
var access=document.getElementById("select1");
var list = document.getElementById("select2");
var selectlist=access[access.selectedIndex].value;
if(selectlist="APPLE"){
list.style.visiblity="hidden";
}else{
list.style.visiblity="block";
}

FIDDLE
//Add eventlistener for change-event
document.getElementById("selCategory").addEventListener("change", filter, false);
//Filter function which will filter on selected value from first select.
function filter()
{
var cat = document.getElementById("selCategory");
var opt = document.getElementById("selOptions");
var selectedValue = cat.options[cat.selectedIndex].value;
var firstEl = false;
var firstIndex = 0;
for(var i = 0; i < opt.options.length; i++)
{
if(opt.options[i].value !== selectedValue)
{
opt.options[i].style.display = "none";
}
else
{
opt.options[i].style.display = "block";
if(!firstEl)
{
firstIndex = i;
firstEl = true;
}
}
}
opt.value = opt.options[firstIndex].value;
}
//Execute on first load, second select is filtered from the start.
filter();
<select name="category" id="selCategory">
<option value="1">Fruit</option>
<option value="2">Animal</option>
<option value="3">Bird</option>
<option value="4">Car</option>
</select>
<select name="options" id="selOptions">
<option value="1">Banana</option>
<option value="1">Apple</option>
<option value="1">Orange</option>
<option value="2">Wolf</option>
<option value="2">Fox</option>
<option value="2">Bear</option>
<option value="3">Eagle</option>
<option value="3">Hawk</option>
<option value="4">BWM<option>
</select>

how to disable dropdown options based on the previously selected dropdown values in multi select dropdown?

i am having two multi select dropdowns. those two dropdowns will have the same set of options (like monday, tuesday ,wednesday). now i want to have a validation where in one dropdown of these selected to some options(these are multi select dropdowns.), then the same options should not be available to select from the other dropdown.(means those should be disable.) here for multi select i am using one UI js plugin multi select dropdown javascript plugin.
<label for="shift_day_list_1">Day</label>
<input name="shift[day_list_1][]" type="hidden" value="" /><select class="form-control" id="day_list_1" multiple="multiple" name="shift[day_list_1][]"><option value="Sunday">Sunday</option>
<option value="Monday">Monday</option>
<option value="Tuesday">Tuesday</option>
<option value="Wednesday">Wednesday</option>
<option value="Thursday">Thursday</option>
<option value="Friday">Friday</option>
<option value="Saturday">Saturday</option></select>
<label for="shift_day_list_2">Day</label>
<input name="shift[day_list_2][]" type="hidden" value="" /><select class="form-control" id="day_list_2" multiple="multiple" name="shift[day_list_2][]"><option value="Sunday">Sunday</option>
<option value="Monday">Monday</option>
<option value="Tuesday">Tuesday</option>
<option value="Wednesday">Wednesday</option>
<option value="Thursday">Thursday</option>
<option value="Friday">Friday</option>
<option value="Saturday">Saturday</option></select>
this is my js code:
$(document).ready(function() {
$('#day_list_1').SumoSelect({
placeholder: 'Select Days',
csvDispCount: 3
});
$('#day_list_2').SumoSelect({
placeholder: 'Select Days',
csvDispCount: 3
});
});
how to implement this? please help me?

I've created a full commented snippet for you:
// when all the elements in the DOM are loaded
document.addEventListener('DOMContentLoaded', function() {
// get both lists and their HTMLOptionElement nodes
var list1 = document.getElementById('day_list_1'),
list2 = document.getElementById('day_list_2'),
options1 = list1.querySelectorAll('option'),
options2 = list2.querySelectorAll('option');
// add event handlers when the lists are changed to call the update function
$(list1).change(update).SumoSelect();
$(list2).change(update).SumoSelect();
function update(e) {
// when the lists are changed, loop through their HTMLOptionElement nodes
var other = (list1 === this) ? list2 : list1;
for (var i = 0; i < options1.length; i++) {
// options of list1 should be disabled if selected in list2 and vice-versa
this[i].selected ? other.sumo.disableItem(i) : other[i].selected ? void 0 : other.sumo.enableItem(i);
}
}
});
.form-control {
width: 130px;
height: 130px;
}
<link href="http://hemantnegi.github.io/jquery.sumoselect/stylesheets/sumoselect.css" rel="stylesheet"/>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.0/jquery.min.js"></script>
<script src="http://hemantnegi.github.io/jquery.sumoselect/javascripts/jquery.sumoselect.min.js"></script>
<select class="form-control" id="day_list_1" multiple="multiple" name="shift[day_list_1][]">
<option value="Sunday">Sunday</option>
<option value="Monday">Monday</option>
<option value="Tuesday">Tuesday</option>
<option value="Wednesday">Wednesday</option>
<option value="Thursday">Thursday</option>
<option value="Friday">Friday</option>
<option value="Saturday">Saturday</option>
</select>
<select class="form-control" id="day_list_2" multiple="multiple" name="shift[day_list_2][]">
<option value="Sunday">Sunday</option>
<option value="Monday">Monday</option>
<option value="Tuesday">Tuesday</option>
<option value="Wednesday">Wednesday</option>
<option value="Thursday">Thursday</option>
<option value="Friday">Friday</option>
<option value="Saturday">Saturday</option>
</select>

you can use normal js to achieve this.Use this following code on day_list_‌​1 on onChange event.
document.getElementById("day_list_2").options[document.getElementById("day_list_‌​1").selectedIndex].disabled = true;

Take a look at this jsfiddle
Click here for jsfiddle example
$("#theSelect option[value=" + value + "]").attr('disabled', 'disabled');
But before this, you need to add change event to the first select/dropdownlist. I hope you can take from here..

Try this:
$('#day_list_1').on('change', function() {
$('#day_list_2').find('option').removeProp('disabled');
var val = $(this).val() || [];
val.forEach(function(item) {
$('#day_list_2').find('[value=' + item + ']').prop('disabled', 'disabled');
});
});
$('#day_list_2').on('change', function() {
$('#day_list_1').find('option').removeProp('disabled');
var val = $(this).val() || [];
val.forEach(function(item) {
$('#day_list_1').find('[value=' + item + ']').prop('disabled', 'disabled');
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<label for="day_list_1">Day</label>
<input type="hidden" value="" />
<select class="form-control" id="day_list_1" multiple="multiple" name="shift[day_list_1][]">
<option value="Sunday">Sunday</option>
<option value="Monday">Monday</option>
<option value="Tuesday">Tuesday</option>
<option value="Wednesday">Wednesday</option>
<option value="Thursday">Thursday</option>
<option value="Friday">Friday</option>
<option value="Saturday">Saturday</option>
</select>
<label for="day_list_2">Day</label>
<input type="hidden" value="" />
<select class="form-control" id="day_list_2" multiple="multiple" name="shift[day_list_1][]">
<option value="Sunday">Sunday</option>
<option value="Monday">Monday</option>
<option value="Tuesday">Tuesday</option>
<option value="Wednesday">Wednesday</option>
<option value="Thursday">Thursday</option>
<option value="Friday">Friday</option>
<option value="Saturday">Saturday</option>
</select>

First you have to change the id of "day_list_1", because as per HTML standard there is only one id in the entire HTML of any tag.
So you should do like this :
First one :
<select class="form-control" id="day_list_1" multiple="multiple"
name="shift[day_list_1][]">
Next one:
<select class="form-control" id="day_list_2" multiple="multiple" name="shift[day_list_1][]">
Code for validation :
function validate(){
var error = false;
var selected_val_1 = [];
$('#day_list_1 :selected').each(function(i, selected){
selected_val_1[i] = $(selected).text();
});
var selected_val_2 = [];
$('#day_list_2 :selected').each(function(i, selected){
selected_val_2[i] = $(selected).text();
});
$.each(selected_val_1, function( index, value ) {
if($.inArray(value, selected_val_2) != -1){
error = true;
}
});
$.each(selected_val_2, function( index, value ) {
if($.inArray(value, selected_val_1) != -1){
error = true;
}
});
if(error == true){
return true;
}else{
return false;
}
}
I hope it helps you . If you have any query regarding this logic then you can revert me .
Thanks.

It will work fine for 3 drop downs also
<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script type="text/javascript">
$(window).load(function(){
var $dropdown1 = $("select[name='project_manager[]']");
var $dropdown2 = $("select[name='test_engineer[]']");
var $dropdown3 = $("select[name='viewer[]']");
$dropdown1.change(function() {
$dropdown2.empty().append($dropdown1.find('option').clone());
$dropdown3.empty().append($dropdown2.find('option').clone());
var selectedItem = $(this).val();
if (selectedItem) {
$(selectedItem).each(function(v,selectedItem) {
$dropdown2.find('option[value="' + selectedItem + '"]').prop('disabled', true);
$dropdown3.find('option[value="' + selectedItem + '"]').prop('disabled', true);
});
}
});
$dropdown2.change(function() {
$dropdown3.empty().append($dropdown2.find('option').clone());
var selectedItem = $(this).val();
if (selectedItem) {
$(selectedItem).each(function(v,selectedItem) {
$dropdown3.find('option[value="' + selectedItem + '"]').prop('disabled', true);
});
}
});
});
</script>
</head>
<body>
<select id="project_manager" name="project_manager[]" multiple="multiple">
<option></option>
<option id="option" value="1">Test 1</option>
<option id="option" value="2">Test 2</option>
<option id="option" value="3">Test 3</option>
</select>
<select id="test_engineer" name="test_engineer[]" multiple="multiple" >
<option></option>
<option value="1">Test 1</option>
<option value="2">Test 2</option>
<option value="3">Test 3</option>
</select>
<select name="viewer[]" multiple="multiple">
<option></option>
<option value="1">Test 1</option>
<option value="2">Test 2</option>
<option value="3">Test 3</option>
</select>
<script>
// tell the embed parent frame the height of the content
if (window.parent && window.parent.parent){
window.parent.parent.postMessage(["resultsFrame", {
height: document.body.getBoundingClientRect().height,
slug: "vrLr9wyg"
}], "*")
}
</script>
</body>
</html>

Multi selection option one depend one another

i want to make a multi selection one is depend to another.
when i select fruit then it show three option banana orange aple then select banbana it show another option red orange yellow.But problem show in red orege yellow so third type i face problem
<html>
<head>
</head>
</body>
<select name="select1" id="select1">
<option value="1">Fruit</option>
<option value="2">Animal</option>
<option value="3">Bird</option>
<option value="4">Car</option>
</select>
<select name="select2" id="select2">
<option value=""></option>
<option value="1">Banana</option>
<option value="1">Apple</option>
<option value="1">Orange</option>
<option value="2">Wolf</option>
<option value="2">Fox</option>
<option value="2">Bear</option>
<option value="3">Eagle</option>
<option value="3">Hawk</option>
<option value="4">BWM<option>
</select>
// here is my problem
<select name="select3" id="select3">
<option value=""></option>
<option value="1">red</option>
<option value="1">orange</option>
<option value="1">yellow</option>
<option value="2">white</option>
<option value="2">gray</option>
<option value="2">blue</option>
<option value="3">ash</option>
<option value="3">silver</option>
<option value="4">gold<option>
</select>
<script type="text/javascript" src="js/jquery-1.7.2.min.js"></script>
<script type="text/javascript" src="js/function.js"></script>
<script type="text/javascript">
$("#select1").change(function() {
if($(this).data('options') == undefined){
/*Taking an array of all options-2 and kind of embedding it on the select1*/
$(this).data('options',$('#select2 option').clone());
}
var id = $(this).val();
var options = $(this).data('options').filter('[value=' + id + ']');
$('#select2').html(options);
});
$("#select2").change(function() {
if($(this).data('options') == undefined){
/*Taking an array of all options-2 and kind of embedding it on the select1*/
$(this).data('options',$('#select3 option').clone());
}
var id = $(this).val();
var options = $(this).data('options').filter('[value=' + id + ']');
$('#select3').html(options);
});
</script>
</body>
</html>

$("#select1").change(function() {
if ($(this).data('options') == undefined) {
/*Taking an array of all options-2 and kind of embedding it on the select1*/
$(this).data('options', $('#select2 option').clone());
}
var id = $(this).val();
var options = $(this).data('options').filter('[value=' + id + ']');
$('#select2').html(options);
});
$("#select2").change(function() {
if ($(this).data('options') == undefined) {
/*Taking an array of all options-2 and kind of embedding it on the select1*/
$(this).data('options', $('#select3 option').clone());
}
var id = $(this).val();
var options = $(this).data('options').filter('[value1=' + id + ']');
$('#select3').html(options);
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<select name="select1" id="select1">
<option value="1">Fruit</option>
<option value="2">Animal</option>
<option value="3">Bird</option>
<option value="4">Car</option>
</select>
<select name="select2" id="select2">
<option value1 = "1" value=""></option>
<option value1 = "1" value="1">Banana</option>
<option value1 = "1" value="1">Apple</option>
<option value1 = "2" value="1">Orange</option>
<option value1 = "2" value="2">Wolf</option>
<option value1 = "2" value="2">Fox</option>
<option value1 = "3" value="2">Bear</option>
<option value1 = "3" value="3">Eagle</option>
<option value1 = "4" value="3">Hawk</option>
<option value1 = "4" value="4">BWM<option>
</select>
<select name="select3" id="select3">
<option value1 = "1" value=""></option>
<option value1 = "1" value="1">red</option>
<option value1 = "1" value="1">orange</option>
<option value1 = "2" value="1">yellow</option>
<option value1 = "2" value="2">white</option>
<option value1 = "2" value="2">gray</option>
<option value1 = "3" value="2">blue</option>
<option value1 = "3" value="3">ash</option>
<option value1 = "4" value="3">silver</option>
<option value1 = "4" value="4">gold<option>
</select>