html - jQuery ignores last element in returned set -


i'm working on internal plugin jquery datatables, , i'm experiencing weird behavior.

take @ following fiddle: http://jsfiddle.net/bjllz/

the code below looking every 'tr' first 'td' element, , adds 'td' checkbox input before every match finds. (notice last row in fiddle above not have checkbox)

$(function () {     var checkbox = $('<input>', {         "type": "checkbox"     })     var td = $('<td/>', {         'class': "table-checkbox"     }).insertbefore("tbody > tr > td:first-child")      var checkboxes = $(checkbox).appendto(td)     var th = $('<th/>', {         'class': 'text-center'     }).insertbefore("thead > tr:nth(0) > th:nth(0)")      $(checkbox).appendto(th)         .change(function () {         $(this).is(":checked") ? checkboxes.prop('checked', true) : checkboxes.prop('checked', false);     }) })

although jquery adding relevant 'td' element, last 'td' in table added, without checkbox input..

this unexpected.. 1 have idea why ?

this line it:

$(checkbox).appendto(th)

unlike .insertbefore(), .appendto() moves element new position. after other operations before line checkbox refers checkbox on last row of table.

you need make copy of checkbox before appending it:

$(checkbox).clone().appendto(th)

demo


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