Changes

var name;

var name;

for (var i = 0; i<imageList.length; i++){

for (var i = 0; i<imageList.length; i++){

   //if(imageList[i].fileWidth>imageList[i].fileHeight){

   if(imageList[i].dataset.fileWidth>imageList[i].dataset.fileHeight){

  // name = imageList[i].alt;

    name = imageList[i].className;

  //  console.log(name);

    console.log(name);

//}

}

console.log(imageList[i].dataset.fileWidth+","+imageList[i].dataset.fileHeight);

console.log(imageList[i].dataset.fileWidth+","+imageList[i].dataset.fileHeight);

}

}