I have jQuery but I'm not sure if it has any built-in sorting helpers. I could make a 2d array of each item's text
, value
, and selected
properties, but I don't think that javascript's built in Array.sort()
would work correctly.
How to Make Sortable Tables. Adding the “sortable” class to a <table> element provides support for sorting by column value. Clicking the column headers will sort the table rows by that column's value. Tables must use <thead> and <th> tags for sortable functionality to work.
sort() will sort on the string representation of the Array objects. For instance with two items "Name" and "Name 2" (where text and value are the same) the sort will put "Name" after "Name 2" (because it is actually comparing the strings "Name,Name" and "Name 2,Name 2").
Extract options into a temporary array, sort, then rebuild the list:
var my_options = $("#my_select option"); var selected = $("#my_select").val(); my_options.sort(function(a,b) { if (a.text > b.text) return 1; if (a.text < b.text) return -1; return 0 }) $("#my_select").empty().append( my_options ); $("#my_select").val(selected);
Mozilla's sort documentation (specifically the compareFunction) and Wikipedia's Sorting Algorithm page are relevant.
If you want to make the sort case insensitive, replace text
with text.toLowerCase()
The sort function shown above illustrates how to sort. Sorting non-english languages accurately can be complex (see the unicode collation algorithm). Using localeCompare in the sort function is a good solution, eg:
my_options.sort(function(a,b) { return a.text.localeCompare(b.text); });
Modified Tom's answer above slightly so that it actually modifies the contents of the select box to be sorted, rather than just returning the sorted elements.
$('#your_select_box').sort_select_box();
jQuery function:
$.fn.sort_select_box = function(){ // Get options from select box var my_options = $("#" + this.attr('id') + ' option'); // sort alphabetically my_options.sort(function(a,b) { if (a.text > b.text) return 1; else if (a.text < b.text) return -1; else return 0 }) //replace with sorted my_options; $(this).empty().append( my_options ); // clearing any selections $("#"+this.attr('id')+" option").attr('selected', false); }
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