php - Fetching attribute on change event Jquery -


i have specified attribute tag want fetch using jquery.

<select id='duration' name='duration'>   <option value=''>select duration</option>   <option value='10' data-cost='50'>10 min</option> </select>

here jquery code.

$(document).ready(function(){    $('#duration').change(function(){        var cst=$(this).data('cost');   // not working        var cst=$('#duration').data('cost');        alert(cst);     }); });

it showing value undefined in alert. i'm doing wrong ?

data attribute of option tag not select tag this represent select tag

try jsfiddle

$(document).ready(function(){    $('#duration').change(function(){        var cst=$(":selected",this).data('cost');   // not working        alert(cst);        }); });

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