Question

<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/

Answer 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.