jquery select option click handler

given:

<select id="mySelect">
  <option>..</option>
  ...
</select>

Using the select id, how can I trigger a click event on one of the options? I tried attaching the event directly to the select, but this triggers an event whenever the select is clicked on (even if there are no options). Oh, and it is a multi-select (although I don't think that matter).

Answers


You want the 'change' event handler, instead of 'click'.

$('#mySelect').change(function(){ 
    var value = $(this).val();
});

$('#mySelect').on('change', function() {
  var value = $(this).val();
  alert(value);
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.0/jquery.min.js"></script>
<select id="mySelect">
  <option value='1'>1</option>
  <option value='2'>2</option>
  <option value='3'>3</option>
  <option value='4'>4</option>
  <option value='5'>5</option>
  <option value='6'>6</option>
  <option value='7'>7</option>
  <option value='8'>8</option>
</select>

you can attach a focus event to select

$('#select_id').focus(function() {
    console.log('Handler for .focus() called.');
});

The problem that I had with the change handler was that it triggered on every keypress that I scrolled up and down the <select>.

I wanted to get the event for whenever an option was clicked or when enter was pressed on the desired option. This is how I ended up doing it:

let blockChange = false;

$element.keydown(function (e) {

    const keycode = (e.keyCode ? e.keyCode : e.which);

    // prevents select opening when enter is pressed
    if (keycode === 13) {
        e.preventDefault();
    }

    // lets the change event know that these keypresses are to be ignored
    if([38, 40].indexOf(keycode) > -1){
        blockChange = true;
    }

});

$element.keyup(function(e) {

    const keycode = (e.keyCode ? e.keyCode : e.which);
    // handle enter press
    if(keycode === 13) {
        doSomething();
    }

});

$element.change(function(e) {

    // this effective handles the click only as preventDefault was used on enter
    if(!blockChange) {
        doSomething();
    }
    blockChange = false;

});

One possible solution is to add a class to every option

<select name="export_type" id="export_type">
    <option class="export_option" value="pdf">PDF</option>
    <option class="export_option" value="xlsx">Excel</option>
    <option class="export_option" value="docx">DocX</option>
</select>

and then use the click handler for this class

$(document).ready(function () {

    $(".export_option").click(function (e) {
        //alert('click');
    });

});

UPDATE: it looks like the code works in FF, IE and Opera but not in Chrome. Looking at the specs http://www.w3.org/TR/html401/interact/forms.html#h-17.6 I would say it's a bug in Chrome.


What I have done in this situation is that I put in the option elements OnClick event like this:

<option onClick="something();">Option Name</option>

Then just create a script function like this:

function something(){
    alert("Hello"); 
    }

UPDATE: Unfortunately I can't comment so I'm updating here TrueBlueAussie apparently jsfiddle is having some issues, check here if it works or not: http://js.do/code/klm


Need Your Help

How to get access token in Web Api OAuth?

c# asp.net-mvc authentication oauth asp.net-web-api2

I have a Web Application that generates the link to get an access token against a web API 2.

How can I find download links for vimeo videos?

php video download vimeo

I saw that today vimeo changed the way they are streaming the videos and I can't stream their videos anymore. I saw that when I generate the link to the video, which was for example: