JQuery execute function when option is selected from option object

I am dynamically creating options for a select element using jQuery. Is it possible in jQuery to customize the function that will be executed when this option is selected?

I know I can detect that the entire select element has changed, but can I specify this for each option? Maybe something like this:

$('<option />').onselect(function(){

 // do something



Edit: If it is not possible to specify a function to be executed when a specific option is selected, is it possible to bind a function to an element in jQuery? This would make my logic cleaner by allowing me to simply execute this function assigned to an option in the .change to select.


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4 answers

You can delegate the event change

to the document and attach an event handler to the element select

. This allows manipulation at runtime:

$(document).on('change', 'select', function() {
    console.log($(this).val()); // the selected options’s value

    // if you want to do stuff based on the OPTION element:
    var opt = $(this).find('option:selected')[0];
    // use switch or if/else etc.


Or, if you insist on creating functions for each OPTION, you can do:

$('<option>').data('onselect', function() {
    alert('I’m selected');

$(document).on('change', 'select', function(e) {
    var selected = $(this).find('option:selected'),
        handler = selected.data('onselect');
    if ( typeof handler == 'function' ) {
        handler.call(selected, e);




You can use the onchange handler to select:

<select name='numbers' id='numbers'>
<option value='1' selected='selected'>One</option>
<option value='2'>two</option>
<option value='3'>three</option>
<option value='4'>four</option>

    if($(this).val() == 1){
    if($(this).val() == 2){






What you can try is bind the event change()

to the element itself select

. From there, assuming you have a valid function for each parameter, you can call an individual callback:

$('select').change(function() {
  var type = $(this).val();
  switch(type) {

  // Alternatively, you can try this as well:
  $(this).find('option:selected').each(function() {




If you say you want to assign separate functions to each element of an option, you can do something like this:

var options = [{"value" : "1",
                "display" : "One",
                "fn" : function() { console.log("One clicked"); }
               {"value" : "2",
                "display" : "Two",
                "fn" : function() { console.log($(this).val() +  " clicked"); }

var $select = $("select").on("change", function() {
    var opt = this.options[this.selectedIndex];

$.each(options, function(i, val) {
        $("<option/>").attr("value", val.value)
                      .data("fn", val.fn)


Demo: http://jsfiddle.net/6H6cu/

This actually adds functions to each option using jQuery method .data()

, and then when clicking / clicking on the select item, it calls the corresponding parameter function (setting the option this

to a parameter).

This is a way of overflowing in my opinion, but it seems to be what you are asking for.

I assume a simpler version would be something like this:

var optionFunctions = {
   "1" : function() { ... },
   "2" : function() { ... },

// code to create the options omitted

$("select").on("change", function() {
    var fn = optionFunctions[$(this).val()];
    if (fn)




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