如何在其他子元素溢出JQuery时显示子元素

这是JavaScript:

$(document).ready(function(){
  var element = $('.commentOwnerPost');
  for(i=0; i < element.length; i++){
    var commentText = $(element[i]).children('.commentText');
    if ($(commentText).offsetHeight < $(commentText).scrollHeight) {
      $parent = $(commentText).parent('.commentOwnerPost');
      $parent.find('.btnSeeMore').hide();
      console.log('Comment text  not overflowing ');
    } else {
      $parent = $(commentText).parent('.commentOwnerPost');
      $parent.find('.btnSeeMore').show();
      console.log('Comment text overflowing ');
    }
   
    $('.btnSeeMore').click(function(){
			
    });
  }
});