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how to sort drop down values

Posted on 2014-12-09
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Last Modified: 2014-12-14
Hi i have drop down value


like <select name="x" id="x">
                <option selected="selected">Sathish</option>
             <option >vijay</option>
              <option >Fox</option>
                 <option >Ajith</option>
 <option >David</option>
</selected>

how to sort this drop down ?
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3 Comments
 
LVL 25

Accepted Solution

by:
Lee Savidge earned 500 total points
ID: 40488658
Well, if you're using jQuery, then you can use one of the multitude of examples on the web. I've used this one here:

http://codepen.io/AlexBezuska/pen/kCwvJ

var sortSelect = function (select, attr, order) {
    if(attr === 'text'){
        if(order === 'asc'){
            $(select).html($(select).children('option').sort(function (x, y) {
                return $(x).text().toUpperCase() < $(y).text().toUpperCase() ? -1 : 1;
            }));
            $(select).get(0).selectedIndex = 0;
            e.preventDefault();
        }// end asc
        if(order === 'desc'){
            $(select).html($(select).children('option').sort(function (y, x) {
                return $(x).text().toUpperCase() < $(y).text().toUpperCase() ? -1 : 1;
            }));
            $(select).get(0).selectedIndex = 0;
            e.preventDefault();
        }// end desc
    }

};

//, attr, order
$(document).ready(function () {

    $('#btnSort').click(function (e) {

        sortSelect('#x', 'text', 'asc');

    }); // event listener click

});

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LVL 142

Expert Comment

by:Guy Hengel [angelIII / a3]
ID: 40488660
unless the data comes from a db query and you build the list dynamically, the only way to sort is to sort them in the html code as such. maybe you could find some javascript to do this "after the page loaded", but I would highly recommend against such a technique...
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LVL 30

Expert Comment

by:Alexandre Simões
ID: 40488869
If you use underscorejs you can do it with as little code as this:
var options = $('#x option');
var sorted = _.sortBy(options, function(item){
  return item.innerHTML;
});
$('#x').html(sorted);

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Here's a working demo: http://plnkr.co/edit/re5RKeN2UcRAf7WRuxa5?p=preview

Although if you have the option, get it sorted right out of the database.
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