Question

I have the following code, however if the input.formdate is not found it will still run the getDateFormat function. This doesn’t make sense to me.

Does anyone know the reason?

$(function() {     $('input.formdate').datepicker({         changeMonth: true,         changeYear: true,         dateFormat: getDateFormat()     }); });  function getDateFormat() {     var format = 'DMY';      if (document.edit_form && document.edit_form.date_format)         format = document.edit_form.date_format.value;      if (format = 'DMY')         return 'dd-mm-yy';     else         return 'mm-dd-yy'; } 

Answer 1

The getDateFormat function is run as soon as Javascript is parsed because it is within an object literal notation.

Your expression is evaluated as

$(function() {     $('input.formdate').datepicker({         changeMonth: true,         changeYear: true,         dateFormat: <RESULT_FROM_CALLING_getDateFormat()>     }); });