Add new select with unqiue name onchange of previous select - javascript

I have a job that requires several hundred select elements on a page. I want to show each select dynamically as the previous is changed. I have a working version in which I put all the select elements in the markup, and then used a simple function to hide them all and show only the first. Then on change of each select the next is added.
This works just fine, but is obviously not ideal. I don't want to put 500 select items in the markup and hide them all for no reason, and my JS function would be 1500 lines long. Plus that would make me feel silly.
How can I automate this process with JS?
I do not need each select to have a unique id, but I do need each select to have a unique and incremented name. Is this possible? I have a working fiddle.
HTML:
<select name="select-one" class="hidden" id="one">
<option value="">not this one</option>
<option value="">pick this one</option>
</select>
<select name="select-two" class="hidden" id="two">
<option value="">not this one</option>
<option value="">pick this one</option>
</select>
<select name="select-three" class="hidden" id="three">
<option value="">not this one</option>
<option value="">pick this one</option>
</select>
<select name="select-four" class="hidden" id="four">
<option value="">not this one</option>
<option value="">pick this one</option>
</select>
JS:
$(document).ready(function() {
$('.hidden').hide();
$('#one').show();
$('#one').change(function(){
$('#two').show();
});
$('#two').change(function(){
$('#three').show();
});
$('#three').change(function(){
$('#four').show();
});
// and so forth...
});

HTML:
<select class="hidden" id="one" name='name_0'>
<option value="">not this one</option>
<option value="">pick this one</option>
</select>
jQuery
$('select').on('change', function() {
$('body').append($(this).clone(true))
})
Result:
Note we are using the overload of the clone() method. This means event handlers and data will be copied along with the elements. So whatever event handler you attached to the original select gets cloned.
If you want to increment the name just use a counter and add the attribute after the clone:
cnt=0;
$('select').on('change', function() {
cnt++
$('body').append($(this).clone(true).attr('name', 'name_' + cnt))
})

My solution:
CSS
.hidden {
display: none;
}
JS
const createSelect = index => `
<select name="select-${index}" class="hidden select" data-index=${index}>
<option value="">not this one</option>
<option value="">pick this one</option>
</select>
`;
$(document).ready(function() {
// Generate 100 selects
for (let i = 0; i < 100; i++) {
$("body").append(createSelect(i));
}
// Show first select
$(`.select[data-index='0']`).show();
$('.select').on('change', function() {
// Store index of a select currently changed
const index = parseInt($(this).attr('data-index'), 10);
// Show next select
$(`.select[data-index='${index + 1}']`).show();
});
});

Related

javascript - Hide Options from Multiple Selection Box when an option from another select is selected

I need your help. So what I want to do is when a user select an option from one select, automatically hide an option from another multiple select.
Example:
if a user choose Car from select A, I want the car option from the select B to be automatically removed or hidden.
select A:
<select name="my_option_one" required id="id_my_option_one">
<option value="" selected>Choose..</option>
<option value="C">Car</option>
<option value="H">House</option>
<option value="A">Airplane</option>
</select>
Select B:
<select name="my_option_two" id="id_my_option_two" multiple="multiple">
<option value="C">Car</option>
<option value="H">House</option>
<option value="A">Airplane</option>
</select>
This is what I have tried but none of it worked.
$(document).ready(function() {
$("#id_my_option_one").change(function() {
if ($(this).val() === 'C') {
$("#id_my_option_two option[value='C']").options[0].remove();
$('select[name=my_option_two] option:eq(1)').hide();
$("#id_my_option_two option[value=" + 'C' + "]").hide();
$("#id_my_option_two option[value='C']").attr('disabled','disabled').hide();
}
});
});
function my_optionsChange() {
$("#id_my_options_two option").show(); //.css("display", "block");
$("#id_my_options_two option[value='" + $("#id_my_options").val() + "']").hide();
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.10.0/jquery.min.js"></script>
<select name="my_options" required id="id_my_options" onchange="my_optionsChange()">
<option value="" selected>Choose..</option>
<option value="C">Car</option>
<option value="H">House</option>
<option value="A">Airplane</option>
</select>
<select name="my_options_two" id="id_my_options_two" multiple="multiple">
<option value="C">Car</option>
<option value="H">House</option>
<option value="A">Airplane</option>
</select>
I made an example which is longer because it's split into parts so you understand better what is going on.
I tried to name the variables so that it's clear what they are, but if you have any questions, please ask in the comments.
Let me know if this works for you.
const firstSelect = $('#id_my_options')
const secondSelect = $('#id_my_options_two')
firstSelect.on('change',function() {
const selected = $(this).find('option:selected');
const selectedValue = selected.val()
const secondOptions = secondSelect.children();
secondOptions.each(function() {
const secondValue = $(this).val()
secondValue === selectedValue ? $(this).hide() : $(this).show()
})
})
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<select name="my_options" required id="id_my_options">
<option value="Choose" selected>Choose..</option>
<option value="C">Car</option>
<option value="H">House</option>
<option value="A">Airplane</option>
</select>
<select name="my_options_two" id="id_my_options_two" multiple="multiple">
<option value="C">Car</option>
<option value="H">House</option>
<option value="A">Airplane</option>
</select>
<select name="my_options" id="firstblock" onchange="disable(2,this.value);">
<option value="" selected>Choose..</option>
<option value="C">Car</option>
<option value="H">House</option>
<option value="A">Airplane</option>
</select>
<select name="my_options" id="secondblock" onchange="disable(1,this.value);">
<option value="" selected>Choose..</option>
<option value="C">Car</option>
<option value="H">House</option>
<option value="A">Airplane</option>
</select>
<script>
function disable(needtoblock,val){
console.log(needtoblock+" "+val);
if(val != ""){
if(needtoblock == 1){
$("#firstblock option[value='"+val+"']").prop('disabled', true);
}else if(needtoblock == 2){
$("#secondblock option[value='"+val+"']").prop('disabled', true);
}else{
}
}else{
$("#secondblock option").prop('disabled', false);
$("#firstblock option").prop('disabled', false);
}
}
</script>
This is how code could look, definetly you need to update and make it suitable for you.
I know, this is a bit late, but maybe it is of interest to someone out there. I understood the demand of OP so, that the hiding of options was to be done in any direction, or potentially spanning over multiple selector boxes. The following script will do exactly that: if you select an option in one selector it will go through the other selectors of the defined group $grp (by doing $grp.not(this).each((i,trg)=> ...)) and will hide/show all options there, depending of whether thay have been selected elsewhere already.
The $(to).toggle(...) method sets the visibility of each option (to) within trg, based on the existence of selected options with the same value in the sibling selectors of trg (again, limited to the current group $grp).
Maybe the script is a little too condensed for easy reading but it shows how much you can achieve with very little code when you use the power of jQuery.
const $grp=$('select[id^=id_my_options]') // define the selector group
$grp.on('change',function(ev){ // bind the change event ...
$grp.not(this).each((i,trg)=> // work on each sibling-selector (trg) of clicked
// selector (this), but only within jquery
// selection $grp
$('option[value!=""]',trg).each((j,to)=> // for all options of sibling-selectors of
// trg (within jquery selection $grp):
$(to).toggle($grp.not(trg).find('option[value='+to.value+']:selected').length==0))
// toggle the visibiltiy of that option
)
})
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<select name="my_options" required id="id_my_options">
<option value="" selected>Choose..</option>
<option value="C">Car</option>
<option value="H">House</option>
<option value="A">Airplane</option>
</select>
<select name="my_options_two" id="id_my_options_two" multiple="multiple">
<option value="C">Car2</option>
<option value="H">House2</option>
<option value="A">Airplane2</option>
</select>
<select name="my_options_three" id="id_my_options_three" multiple="multiple">
<option value="O">yet another option</option>
<option value="C">Car3</option>
<option value="H">House3</option>
<option value="A">Airplane3</option>
</select>
<br><br>
<select name="my_options_four" id="id_your_options_four" multiple="multiple">
<option value="O">and some unrelated options</option>
<option value="C">Car3</option>
<option value="H">House3</option>
<option value="A">Airplane3</option>
</select>

Change value of select list with value of another select list jquery

How can I change the value of a select list with the value of another select list
<select class="main-filter" id="Test1" name="Test1"><option value="">Select Option</option>
<option value="1">One</option>
<option value="2">Two</option>
</select>
Need to replace #ReplaceThisText# with value selected from above select box
<select id="selectfilter" name="selectfilter" class="form-control main-filter">
<option value="">Sort Products</option>
<option value="/?id=na&selectfilter=hl&Type=#ReplaceThisText#">Chnage Value</option>
</select>
I have tried code from this link Change the Text of a Option with jQuery
and jquery how to find and replace a selected option that has a certain value
but cannot seem to get it to work
My code is
$('#Test1').change(function () {
sessionStorage.setItem("Test1", $(this).val());
$('.main-filter :selected:contains("#ReplaceThisText#")').val($(this).val());
location.href = $(this).val();
});
:contains will look at the .text() value - but your #ReplaceThisText# is not in the .text() value - so you'll need to use .filter() to find it instead:
Adding some console.logs so you can see what's happening and updated the .val(newval) code to make the replacement.
$('#Test1').change(function() {
var newval = $(this).val();
console.log("before", $(".main-filter :contains('Change Value')").val())
var opt = $('.main-filter option').filter(function() {
return $(this).val().indexOf("#ReplaceThisText#") >= 0;
});
console.log("opt length", opt.length);
opt.each(function() {
$(this).val($(this).val().replace(/#ReplaceThisText#/gi, newval));
});
console.log("after", $(".main-filter :contains('Change Value')").val())
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<select class="main-filter" id="Test1" name="Test1">
<option value="">Select Option</option>
<option value="1">One</option>
<option value="2">Two</option>
</select>
<select id="selectfilter" name="selectfilter" class="form-control main-filter">
<option value="">Sort Products</option>
<option value="/?id=na&selectfilter=hl&Type=#ReplaceThisText#">Change Value</option>
</select>

How to get the values and text of all the options of select element

I have a select element with a huge list of options (more than 2000).
I'd like to get the values and name of each option, one by line.
<select name='county_city' id='county_city'>
<OPTION value="51421">City one</OPTION>
<OPTION value="51422">City two</OPTION>
<OPTION value="51423">City three</OPTION>
<OPTION value="51424">City four</OPTION>
</select>
What I'd like is,
51421 = City one
51422 = City two
51423 = City three
51424 = City four
One option per line..
Thanks.
First, you need to iterate through the options array, and collect the values & text into a data array, then you can do whatever you feel like with it, for instance print it to the page like so:
var data = [];
$('#county_city option').each(function(){
var current = $(this);
data.push({
value: current.val(),
text: current.html()
})
});
$.each(data, function(){
console.log(this);
$('#result').append(this.value + ': ' + this.text)
.append('<br />');
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<select name='county_city' id='county_city'>
<OPTION value="51421">City one</OPTION>
<OPTION value="51422">City two</OPTION>
<OPTION value="51423">City three</OPTION>
<OPTION value="51424">City four</OPTION>
</select>
<div id="result"></div>
use the following code :-
HTML
<select name='county_city' id='county_city'>
<OPTION value="51421">City one</OPTION>
<OPTION value="51422">City two</OPTION>
<OPTION value="51423">City three</OPTION>
<OPTION value="51424">City four</OPTION>
</select>
JQuery
$(document).ready(function() {
$("#county_city OPTION").each(function(index){
alert(this.value);
alert(this.text);
});
});

In several selects make selected options uniq

I have question where you need to find pairs of words in Russian and English
<div class="form-group" id="question4">
<label for="q4FirstSelectEN">4</label>
<div class="row">
<div class="col-lg-offset-2 col-lg-2 q4EN">
<select name="firstSelectEn" id="q4FirstSelectEN">
<option disabled selected style="display: none" value=""></option>
<option value="red">red</option>
<option value="green">green</option>
<option value="purple">purple</option>
</select>
<select class="top-buffer" name="secondSelectEn" id="q4SecondSelectEN">
<option disabled selected style="display: none" value=""></option>
<option value="red">red</option>
<option value="green">green</option>
<option value="purple">purple</option>
</select>
<select class="top-buffer" name="secondSelectEn" id="q4ThirdSelectEN">
<option disabled selected style="display: none" value=""></option>
<option value="red">red</option>
<option value="green">green</option>
<option value="purple">purple</option>
</select>
</div>
<div class="col-lg-2 q4RU">
<select name="firstSelectRu" id="q4FirstSelectRu">
<option disabled selected style="display: none" value=""></option>
<option value="red">красный</option>
<option value="green">зелёный</option>
<option value="purple">фиолетовый</option>
</select>
<select class="top-buffer" name="firstSelectRu" id="q4SecondSelectRu">
<option disabled selected style="display: none" value=""></option>
<option value="red">красный</option>
<option value="green">зелёный</option>
<option value="purple">фиолетовый</option>
</select>
<select class="top-buffer" name="firstSelectRu" id="q4ThirdSelectRU">
<option disabled selected style="display: none" value=""></option>
<option value="red">красный</option>
<option value="green">зелёный</option>
<option value="purple">фиолетовый</option>
</select>
</div>
</div>
</div>
When user selects for example 'red' in (select) inside (div class='q4EN') in all remaining selects in this (div class=q4EN) selected 'red' option become nonSelectable
(nonSelectable is class in css with display:none)
When user change decision and select 'green' instead of 'red' in first (select) red became available in rest selects and green become nonSelectable
When all 3 select have their value user can't change anything
My js for this is not working and I out of ideas
$(".q4EN").find("select").change(function () {
$(".q4EN").find("select")
.not(this)
.find("option:selected")
.addClass("nonSelectable");
});
I believe the problem is order of operations.
$(".q4EN").find("select").change(function () {
$(".q4EN").find("select") //Finds all select lists
.not(this) //Finds all except the one just changed
.find("option:selected") //Finds selected of all except the one just changed
.addClass("nonSelectable"); //Wont do anything because nothing was selected
});
Try the following:
$(".q4EN").find("select").change(function() {UpdateOptions();});
function UpdateOptions(){
var ss = $(".q4EN").find("select");
ss.find('option').prop("disabled", false); //Enable all before disabling selected
ss.each(function () {
var s = $(this).val();
if(s != undefined && s != "") {
ss.find("option[value=" + s + "]").prop("disabled", true);
}
});
}
This is an alternate way to achieve what you need. It basically iterate through every select element and find the corresponding option and disables it.
$('select').find("option").addClass("selectable");
$('select').on("change",function()
{
// $(this).find("option").prop("disabled",false); // uncomment this if you wish to reset the disabled selection
var $thisId = this.id;
var $selectedOption = $(this).find("option:selected").val();
$('select').each(function()
{
if(this.id !== $thisId)
{
// $(this).find("option").removeClass("non-selectable").addClass("selectable"); // uncomment this if you wish to reset the disabled selection
$(this).find("option[value=" + $selectedOption + "]").prop("disabled",true).addClass("non-selectable").removeClass("selectable");
}
});
})
https://fiddle.jshell.net/a2n234eq/4/
To target a specific group ( like EN and RU ) , change $('select') to $('.q4EN select')

Remove option in select

<select class="one">
<option></option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>
<br />
<select class="one">
<option></option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>
<br />
<select class="one">
<option></option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>
$(".one").change(function(){
})
I would like make - for example if i select in first position option 1 then i others selects this option should be removed.
So if i in first select i select 1 then in select second and third i have only option 2 and 3. If in second select i select 2 then in last select i have only option 3.
How can i make it? I would like use jQuery.
LIVE: http://jsfiddle.net/9N9Tz/1/
If you need to sort something, consider using something like jQuery UI sortable as a bunch of drop down menus make a really poor UX for that.
But to answer your question:
var $selects = $('.one');
$selects.on("keyup click change", function(e) {
$selects.not(this).trigger('updateselection');
}).on("updateselection", function(e, data) {
var $this = $(this);
$this.children().show();
$selects.not(this).each(function() {
var value = $(this).val();
if (value) {
$this.children('[value="' + value + '"]').hide();
}
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<select class="one">
<option></option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>
<br />
<select class="one">
<option></option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>
<br />
<select class="one">
<option></option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>
Hiding an option works in current firefox. I'm not sure about legacy browser. Hiding, but not removing, the element makes sure that you can change your selection without having crippled your input elements.
Here you go http://jsfiddle.net/Calou/9N9Tz/6/.
When the value of the <select>s changes, just take this value and search for the <option>s with this value in the others <select>s and remove them.
$(".one").change(function(){
var val = this.value
if (val !== '') {
$(this).siblings().find('option[value=' + val + ']').remove()
}
})
// As soon as all selects have one class, you'll have to distinguish them:
$(".one").each(function() {
// Now this corresponds to one select (in the loop over all)
$(this).change(function() {
// Fix what've done before
$('option').show();
// Find every other select, find an option in it
// that has the same value that is selected in current select
// (sorry for the description)
$('.one').not(this).find('option[value=' + $(this).find('option:selected').val() +']').hide();
});
})​;​
jsFiddle
It will be easy if you use different class for second and third select element
$(".one").change(function(){
var val = parseInt($(this).val());
$('.two,.three').find('option:contains('+val+')').remove();
});
EDIT:
Updated code to apply for multiple selects. [Thanks to all commentators and Alex for bringing it to notice ]
$(".one").change(function(){
var val = parseInt($(this).val());
$(this).siblings().find('option:contains('+val+')').remove();
});

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