open dropdown list from javascript function

Question

Iam trying to show the dropdown option when javascript function is called. but eventually iam not succeed on this. need help Here is my code:

<script>
function showState(str){ 
$('#Acntname').trigger('click');

}
</script>
...
<select class="input_panel" id="Acntname" > 
<option value="0">Select</option>
<option value="1">Equity Share Capital</option>
<option value="2">Deprication Fund</option>  </select>

<input type="text" class="input_panel" id="accountname" onkeyup="showState(this.value)"/>

i used triggered function to open the dropdown but it doesn't work.

Do you want to show the dropdown or fetch selected dropdown option value? — Krish R, Oct 29 '13 at 07:27
Found something [here](http://stackoverflow.com/questions/2895608/click-trigger-on-select-box-doesnt-work-in-jquery) — Marikkani Chelladurai, Oct 29 '13 at 07:30

score 13 · Answer 1 · edited Sep 19 '16 at 12:44

13

Here you go..you can do this by dispatching mousedown event on dropdown..

Demo Fiddle

JS:

window.showState = function (str) {
    var dropdown = document.getElementById('Acntname');
    var event = document.createEvent('MouseEvents');
    event.initMouseEvent('mousedown', true, true, window);
    dropdown.dispatchEvent(event);
}

EDIT: This works perfectly in Chrome <53, not sure for Firefox and IE.

edited Sep 19 '16 at 12:44

loxx

119
4

answered Oct 29 '13 at 07:40

Nikhil N

4,507
1
35
53

This won't work for folks browsing with TAB on their keyboard. – Sean Feb 11 '14 at 21:17
1

this works only in Chrome...!!!! – Mayank Pathak Apr 11 '14 at 05:07
1

This worked for me! I just used `dropdown.focus(); try { /* answer's chrome only code here */ } catch(e){}` to prevent it from messing anything up in Firefox/IE. Chrome only is better than nothing! – Luc Nov 02 '14 at 02:54
2

@smclark89 Actually, you can make it work with tab. Juse use a `keydown` event listener with `if (event.keyCode == 9 || event.keyCode == 13) { /* code here */ }` to capture the tab and enter keys. – Luc Nov 02 '14 at 02:58
this works in firefox 35.0.1 – P. Avery Feb 13 '15 at 22:11
Guys can u Please create Demo – Sopo Jan 05 '16 at 12:12
@Sopo Demo is here http://jsfiddle.net/2wUjb/7/ – Nikhil N Jan 11 '16 at 14:36
2

I tested it on Chrome Version 53.0.2785.101 (64-bit) and it does not work. It worked on Chrome Version 51.0.2704.106 (64-bit) though... – juacompe Sep 14 '16 at 11:07

score 4 · Answer 2 · answered Oct 29 '13 at 07:40

4

You can do this:

var sel = document.getElementById('Acntname');
var len = sel.options.length;

sel.setAttribute('size', len);

Set the size back to 1 to close it

answered Oct 29 '13 at 07:40

Peter Munnings

3,309
1
30
43

1

Does not work in Firefox. – Karel Bílek Jun 02 '16 at 15:50

score 0 · Answer 3 · answered Oct 29 '13 at 07:30

Its not possible to toggle the drop down on triggering other element.

If you want to select the value of select box on keyup event of textbox then try this,

function showState(str){ 
   //  alert(str);
   $('#Acntname option[value="'+str+'"]').prop('selected',true);
}

Demo

score 0 · Answer 4 · answered Oct 29 '13 at 07:40

0

You can't open the dropdown list but there is a semi-solution you could do the following

to "open" the list:

$("#Acntname").attr("size","3");

and

$("#Acntname").attr("size","1");

to close the list.

answered Oct 29 '13 at 07:40

Ricky Stam

2,116
21
25

We can open dropdown list..check this..http://jsfiddle.net/2wUjb/7/ – Nikhil N Oct 29 '13 at 07:42
4

@Nikhil your solution is not working in Firefox and IE at least not for me. – Ricky Stam Oct 29 '13 at 07:45
oh..I am checking it in chrome..let me check into firefox and ie also. – Nikhil N Oct 29 '13 at 07:46

open dropdown list from javascript function

4 Answers4

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