javascript - jQuery attr() failing -


in following code, on line commented "problem line", attr causes console.log print out "undefined" when click on 1 of s. can't seem figure out why:

test.js

    var html = '';         // number of panels in carousel     var panelcount = 0;     // panel forefront of carousel     var currentpanel = 0;      $(document).ready(function(){          (var i=0; < 5; i++) {             html += '<div class="team-member" id="' + panelcount + '">' + panelcount + '</div>';             html += '<div class="reflection" id="' + panelcount + '"></div>';             panelcount++;         }         $('#carousel').html(html);       $(".container-carousel").on('click', '.team-member', function(e) {             var target = $(e.currenttarget);             var targetid = parseint(target.attr('id'));             var frontrotation = currentpanel * (360/panelcount);              $("#" + targetid + ".reflection").css("transform", "rotatey(   " + frontrotation + "deg ) translatez( 288px ) translatey( 175px ) translatez( 175px ) rotatex( 90deg )");             var targetidstring = '' + targetid;              /* problem line: */             $("#" + currentpanel + ".reflection").attr('id', targetid);              console.log($("#" + currentpanel + ".reflection").attr('id'));              $("#" + targetid + ".reflection").attr('id', currentpanel);         });         });

test.html

<!doctype html>  <!-- jquery-->  <script type = "text/javascript" src = "http://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script> <script type = "text/javascript" src = "test.js"></script>  <section class="container-carousel">     <div id="carousel" style="transform: translatez(-288px) rotatey(-360deg);"></div> </section>  </html>

any ideas why?

this because after change id of element, try logging selecting old id.

    $("#" + currentpanel + ".reflection").attr('id', targetid);     /*the id targetid*/      console.log($("#" + currentpanel + ".reflection").attr('id'));     /*currentpanel not work because element id no longer exists*/

change console.log 

console.log($("#" + targetid + ".reflection").attr('id'));

see working here


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