jquery: If statement not working inside ajax success function -

i have success function in ajax returns response text python script can either "success" or "empty". want place if-loop inside success function, if-loop not working. getting correct data python script because alert statement working fine , printing "success". not enter ifloop

i have tried bunch of things control not entering if-loop, please tell me doing wrong:

submithandler: function (form) {                  $.ajax({                     type: 'post',                     url: '/cgi-bin/getdataworld.py',                     data: $(form).serialize(),                      success: function(data) {                             //document.write(result);                             console.log("result "+data);                             alert(data);                              if(data === "success"){                             window.location = 'index.html';                                }                            else{                                  alert("no data present");                                }                       },                      error: function (responsedata) {                 console.log('ajax request not recieved!');             }                  });                  return false;             } 

this means you're responding isn't "success". has line break or other whitespace before or after it, maybe more one.

perhaps:

if (/^\s*success\s*$/.test(data)) {     // success } 

or use jquery's $.trim:

if ($.trim(data) === "success") {     // success } 

also sure you're not replying "success" or "success", string comparisons case-sensitive.

if you're not sure:

if (/^\s*success\s*$/i.test(data)) {     // success } 

or

if ($.trim(data).touppercase() === "success") {     // success }