How to avoid the need for ctrl-click in a multi-select box using Javascript?
Check this fiddle: http://jsfiddle.net/xQqbR/1022/
You basically need to override the mousedown event for each <option> and toggle the selected property there.
$('option').mousedown(function(e) {
e.preventDefault();
$(this).prop('selected', !$(this).prop('selected'));
return false;
});
For simplicity, I've given 'option' as the selector above. You can fine tune it to match <option>s under specific <select> element(s). For ex: $('#mymultiselect option')
Had to solve this problem myself and noticed the bugged behavior a simple interception of the mousedown and setting the attribute would have, so made a override of the select element and it works good.
jsFiddle: http://jsfiddle.net/51p7ocLw/
Note: This code does fix buggy behavior by replacing the select element in the DOM. This is a bit agressive and will break event handlers you might have attached to the element.
window.onmousedown = function (e) {
var el = e.target;
if (el.tagName.toLowerCase() == 'option' && el.parentNode.hasAttribute('multiple')) {
e.preventDefault();
// toggle selection
if (el.hasAttribute('selected')) el.removeAttribute('selected');
else el.setAttribute('selected', '');
// hack to correct buggy behavior
var select = el.parentNode.cloneNode(true);
el.parentNode.parentNode.replaceChild(select, el.parentNode);
}
}<h4>From</h4>
<div>
<select name="sites-list" size="7" multiple>
<option value="site-1">SITE</option>
<option value="site-2" selected>SITE</option>
<option value="site-3">SITE</option>
<option value="site-4">SITE</option>
<option value="site-5">SITE</option>
<option value="site-6" selected>SITE</option>
<option value="site-7">SITE</option>
<option value="site-8">SITE</option>
<option value="site-9">SITE</option>
</select>
</div>