[javascript] 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).

This question is related to javascript jquery html

The answer is


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;

});

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


you can attach a focus event to select

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

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.


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

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

_x000D_
_x000D_
$('#mySelect').on('change', function() {_x000D_
  var value = $(this).val();_x000D_
  alert(value);_x000D_
});
_x000D_
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.0/jquery.min.js"></script>_x000D_
<select id="mySelect">_x000D_
  <option value='1'>1</option>_x000D_
  <option value='2'>2</option>_x000D_
  <option value='3'>3</option>_x000D_
  <option value='4'>4</option>_x000D_
  <option value='5'>5</option>_x000D_
  <option value='6'>6</option>_x000D_
  <option value='7'>7</option>_x000D_
  <option value='8'>8</option>_x000D_
</select>
_x000D_
_x000D_
_x000D_


EXAMPLE


its working for me

<select name="" id="select">
    <option value="1"></option>
    <option value="2"></option>
    <option value="3"></option>
</select>

<script>
    $("#select > option").on("click", function () {
       alert(1)
    })
</script>

Examples related to javascript

need to add a class to an element How to make a variable accessible outside a function? Hide Signs that Meteor.js was Used How to create a showdown.js markdown extension Please help me convert this script to a simple image slider Highlight Anchor Links when user manually scrolls? Summing radio input values How to execute an action before close metro app WinJS javascript, for loop defines a dynamic variable name Getting all files in directory with ajax

Examples related to jquery

How to make a variable accessible outside a function? Jquery assiging class to th in a table Please help me convert this script to a simple image slider Highlight Anchor Links when user manually scrolls? Getting all files in directory with ajax Bootstrap 4 multiselect dropdown Cross-Origin Read Blocking (CORB) bootstrap 4 file input doesn't show the file name Jquery AJAX: No 'Access-Control-Allow-Origin' header is present on the requested resource how to remove json object key and value.?

Examples related to html

Embed ruby within URL : Middleman Blog Please help me convert this script to a simple image slider Generating a list of pages (not posts) without the index file Why there is this "clear" class before footer? Is it possible to change the content HTML5 alert messages? Getting all files in directory with ajax DevTools failed to load SourceMap: Could not load content for chrome-extension How to set width of mat-table column in angular? How to open a link in new tab using angular? ERROR Error: Uncaught (in promise), Cannot match any routes. URL Segment