Regex validation code for excel file upload jQuery

Question

how to validate excel files

My JQuery

 jQuery(\"#excel\").validate({
      expression: \"if (VAL.match(/^([a-z]\\w*)\\.(xls[mx]?)$/) &am         


        

Answer 1

First of all, you should change an order in expression, since you don’t want to execute expression on invalid VAL:

VAL && VAL.match(/^([a-z]\w*)(.xlsx|.xlsm|.xls)

Secondary, any \w symbol is perfectly valid as starting symbol for filename, as well, as a dot and space (and, possibly, some other symbols.) Dots in regexps should be escaped. And, a last but not least, you could want to compact the xls*s:

/^([\w\s.]*)\.xls[xm]?$/