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).
You want the 'change' event handler, instead of 'click'.
$('#mySelect').change(function(){
var value = $(this).val();
});
click events do not currently get generated in Chrome at all for <option> elements.click not firing in Chrome?
$('#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;
});
You can also try this to get previous value of select and the clicked value.
HTML
<select name="status">
<option value="confirmed">confirmed</option>
<option value="packed">packed</option>
<option value="shiped">shiped</option>
<option value="delivered">delivered</option>
</select>
script
var previous;
$("select[name=status]").focus(function () {
previous = this.value;
}).change(function() {
var next = $(this).val()
alert("previous: "+previous+ " and Next: "+ next)
previous = this.value;
});
<select name="data" id = 'cohort' class="form-control" style = "width:215px; margin-left:20px; margin-bottom:8px ; height:30px" >
<option value = 0>All</option>
<option value = 1>Diseases</option>
<option value = 2>Drugs</option>
<option value = 3>Procedures</option>
</select>
const element = document.getElementById("cohort");
const event = new MouseEvent("mousedown");
element.dispatchEvent(event);
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
<option> inside a <select>, to make it valid HTML, you will see your code does not work on Chrome: jsfiddle.net/TrueBlueAussie/j6fkLjc8 The downvote is correct. This code should not be used until Chrome fix that problem :PWhat you are looking for is onFocus like this:
$("#mySelect").on("focus", function(){});
This fires when select is clicked before any option was chosen.
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.
