jquery - I am not able to write javascript array variables values into CSV file in a Given pattern -

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i have 3 javascript variables name area, device , problem. want store values of these variables csv file 1 one given in image attached , download sheet on click of download button.both jsp , javascript in same file.i have tried below far.

 sample.jsp  <form>       <input type="button" id="downloadbtn" value="download"> </form>  <script type="text/javascript">   var area=["area1","area2"];   var device=[["device1","device2"],["device3","device4"]];   var problem=[[["problem1","problem2"]],[["problem3","problem4"]],[["problem5","problem6"]],[["problem7","problem8"]]];   $("#downloadbtn").click(function() {         var resp=confirm("do want download?");             if(resp){                   var last = '';                   (var = 0; < area.length; i++) {                     var first = area[i];                      (var j = 0; j < first .length; j++) {                         var second= device[j];                          for(var k=0;k<second.length;k++){                             var third=problem[k];                          var value= third.replace(/"/g, '""');                         if (value.search(/("|,|\n)/g) >= 0)                             value= '"' + value+ '"';                         if (k > 0)                             last += ',';                         last += value;                     }                     }                     last += '\n';                 }                  var anchor= document.createelement('a');                 anchor.setattribute('href', 'data:text/csv;charset=utf-8,' + encodeuricomponent(last ));                 anchor.setattribute('download', 'sample.csv');                 anchor.click();              } }); </script>

please suggest me kind of changes or modification needed desired pattern. how can achieved required in image. comment below kind of clarification on question. suggestion welcome.

enter image description here


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