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              <h1>Basic</h1>
<p>Adds the scrollbar only if the bottom one is present, does not recompute the top scrollbar.</p>

<div class="double-scroll">
  <table>
    <tr>
      <th>AAAAAAAAA</th>
      <th>BBBBBBBBB</th>
      <th>CCCCCCCCC</th>
      <th>DDDDDDDDD</th>
      <th>EEEEEEEEE</th>
      <th>FFFFFFFFF</th>
      <th>GGGGGGGGG</th>
      <th>HHHHHHHHH</th>
    </tr>
    <tr>
      <td>AAAAAAAAA</td>
      <td>BBBBBBBBB</td>
      <td>CCCCCCCCC</td>
      <td>DDDDDDDDD</td>
      <td>EEEEEEEEE</td>
      <td>FFFFFFFFF</td>
      <td>GGGGGGGGG</td>
      <td>HHHHHHHHH</td>
    </tr>
    <tr>
      <td>AAAAAAAAA</td>
      <td>BBBBBBBBB</td>
      <td>CCCCCCCCC</td>
      <td>DDDDDDDDD</td>
      <td>EEEEEEEEE</td>
      <td>FFFFFFFFF</td>
      <td>GGGGGGGGG</td>
      <td>HHHHHHHHH</td>
    </tr>
  </table>
</div>


<h1>Recompute on window resize</h1>
<p>Adds the scrollbar only if the bottom one is present, and recompute the top scrollbar size each time the window is resized.</p>
<p>Resize the window to try!!!!</p>

<div id="sample2">
  <table>
    <tr>
      <th>AAAAAAAAA</th>
      <th>BBBBBBBBB</th>
      <th>CCCCCCCCC</th>
      <th>DDDDDDDDD</th>
      <th>EEEEEEEEE</th>
      <th>FFFFFFFFF</th>
      <th>GGGGGGGGG</th>
      <th>HHHHHHHHH</th>
      <th> IIIIIIIII</th>
      <th>JJJJJJJJJ</th>
    </tr>
    <tr>
      <td>AAAAAAAAA</td>
      <td>BBBBBBBBB</td>
      <td>CCCCCCCCC</td>
      <td>DDDDDDDDD</td>
      <td>EEEEEEEEE</td>
      <td>FFFFFFFFF</td>
      <td>GGGGGGGGG</td>
      <td>HHHHHHHHH</td>
      <td>IIIIIIIII</td>
      <td>JJJJJJJJJ</td>
    </tr>
    <tr>
      <td>AAAAAAAAA</td>
      <td>BBBBBBBBB</td>
      <td>CCCCCCCCC</td>
      <td>DDDDDDDDD</td>
      <td>EEEEEEEEE</td>
      <td>FFFFFFFFF</td>
      <td>GGGGGGGGG</td>
      <td>HHHHHHHHH</td>
      <td>IIIIIIIII</td>
      <td>JJJJJJJJJ</td>
    </tr>
  </table>
</div>


<p>Example for jQuery plugin "jqDoubleScroll": <a href="https://github.com/avianey/jqDoubleScroll">https://github.com/avianey/jqDoubleScroll</a>
</p>
            
          
!
            
              html {
  height: 100%;
}

body {
  padding: 40px;
  background: linear-gradient(130deg, #07d9a3, #048fee);
  background-size: 400% 400%;
  -webkit-animation: gradient 16s ease infinite;
  -moz-animation: gradient 16s ease infinite;
  animation: gradient 16s ease infinite;
}

.double-scroll {
  width: 400px;
}

#sample2 {
  width: 100%;
}


/** Looks better **/

h1 {
  font-family: Calibri;
  color: white;
  font-size: 24px;
  font-style: normal;
  font-variant: normal;
  font-weight: 500;
  line-height: 26.4px;
}

h3 {
  font-family: Calibri;
  color: white;
  font-size: 14px;
  font-style: normal;
  font-variant: normal;
  font-weight: 500;
  line-height: 15.4px;
}

p {
  font-family: Calibri;
  color: white;
  font-size: 14px;
  font-style: normal;
  font-variant: normal;
  font-weight: 400;
  line-height: 20px;
}

a {
  color: #ffffff;
}

table {
  font-family: Calibri;
  color: white;
  border-collapse: collapse;
  border-spacing: 0;
  width: 100%;
  height: 100%;
  margin: 0px;
  padding: 0px;
}

.double-scroll {
  margin-bottom: 40px;
}

tr:nth-child(odd) td {}

tr:nth-child(even) td {
  background-color: rgba(255, 255, 255, 0.2);
}

table td,
table th {
  vertical-align: middle;
  text-align: left;
  padding: 12px;
  font-size: 14px;
  font-family: Calibri;
  color: white;
}

table tr th {
  background-color: transparent !important;
  border-bottom: 1px solid rgba(255, 255, 255, 0.6);
  text-align: center;
  font-size: 14px;
  font-family: Calibri;
  font-weight: bold;
}

@-webkit-keyframes gradient {
  0% {
    background-position: 5% 0%
  }
  50% {
    background-position: 96% 100%
  }
  100% {
    background-position: 5% 0%
  }
}

@-moz-keyframes gradient {
  0% {
    background-position: 5% 0%
  }
  50% {
    background-position: 96% 100%
  }
  100% {
    background-position: 5% 0%
  }
}

@keyframes gradient {
  0% {
    background-position: 5% 0%
  }
  50% {
    background-position: 96% 100%
  }
  100% {
    background-position: 5% 0%
  }
}

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background-color: rgba(255, 255, 255, 0.1);
}

::-webkit-scrollbar-thumb {
  background-color: rgba(255, 255, 255, 0.5);
}

::-webkit-scrollbar-button {
  /*   width: 10px;
  height: 10px;
  background-color: rgba(255, 255, 255, 0.5); */
}
            
          
!
            
              $(document).ready(function() {
  $('.double-scroll').doubleScroll();
  $('#sample2').doubleScroll({
    resetOnWindowResize: true
  });
});

/*
 * @name DoubleScroll
 * @desc displays scroll bar on top and on the bottom of the div
 * @requires jQuery
 *
 * @author Pawel Suwala - http://suwala.eu/
 * @author Antoine Vianey - http://www.astek.fr/
 * @version 0.5 (11-11-2015)
 *
 * Dual licensed under the MIT and GPL licenses:
 * https://www.opensource.org/licenses/mit-license.php
 * http://www.gnu.org/licenses/gpl.html
 * 
 * Usage:
 * https://github.com/avianey/jqDoubleScroll
 */
 (function( $ ) {
 	
 	jQuery.fn.doubleScroll = function(userOptions) {
	
		// Default options
		var options = {
			contentElement: undefined, // Widest element, if not specified first child element will be used
			scrollCss: {                
				'overflow-x': 'auto',
				'overflow-y': 'hidden'
			},
			contentCss: {
				'overflow-x': 'auto',
				'overflow-y': 'hidden'
			},
			onlyIfScroll: true, // top scrollbar is not shown if the bottom one is not present
			resetOnWindowResize: false, // recompute the top ScrollBar requirements when the window is resized
			timeToWaitForResize: 30 // wait for the last update event (usefull when browser fire resize event constantly during ressing)
		};
	
		$.extend(true, options, userOptions);
	
		// do not modify
		// internal stuff
		$.extend(options, {
			topScrollBarMarkup: '<div class="doubleScroll-scroll-wrapper" style="height: 20px;"><div class="doubleScroll-scroll" style="height: 20px;"></div></div>',
			topScrollBarWrapperSelector: '.doubleScroll-scroll-wrapper',
			topScrollBarInnerSelector: '.doubleScroll-scroll'
		});

		var _showScrollBar = function($self, options) {

			if (options.onlyIfScroll && $self.get(0).scrollWidth <= $self.width()) {
				// content doesn't scroll
				// remove any existing occurrence...
				$self.prev(options.topScrollBarWrapperSelector).remove();
				return;
			}
		
			// add div that will act as an upper scroll only if not already added to the DOM
			var $topScrollBar = $self.prev(options.topScrollBarWrapperSelector);
			
			if ($topScrollBar.length == 0) {
				
				// creating the scrollbar
				// added before in the DOM
				$topScrollBar = $(options.topScrollBarMarkup);
				$self.before($topScrollBar);

				// apply the css
				$topScrollBar.css(options.scrollCss);
				$self.css(options.contentCss);

				// bind upper scroll to bottom scroll
				$topScrollBar.bind('scroll.doubleScroll', function() {
					$self.scrollLeft($topScrollBar.scrollLeft());
				});

				// bind bottom scroll to upper scroll
				var selfScrollHandler = function() {
					$topScrollBar.scrollLeft($self.scrollLeft());
				};
				$self.bind('scroll.doubleScroll', selfScrollHandler);
			}

			// find the content element (should be the widest one)	
			var $contentElement;		
			
			if (options.contentElement !== undefined && $self.find(options.contentElement).length !== 0) {
				$contentElement = $self.find(options.contentElement);
			} else {
				$contentElement = $self.find('>:first-child');
			}
			
			// set the width of the wrappers
			$(options.topScrollBarInnerSelector, $topScrollBar).width($contentElement.outerWidth());
			$topScrollBar.width($self.width());
			$topScrollBar.scrollLeft($self.scrollLeft());
			
		}
	
		return this.each(function() {
			
			var $self = $(this);
			
			_showScrollBar($self, options);
			
			// bind the resize handler 
			// do it once
			if (options.resetOnWindowResize) {
			
				var id;
				var handler = function(e) {
					_showScrollBar($self, options);
				};
			
				$(window).bind('resize.doubleScroll', function() {
					// adding/removing/replacing the scrollbar might resize the window
					// so the resizing flag will avoid the infinite loop here...
					clearTimeout(id);
					id = setTimeout(handler, options.timeToWaitForResize);
				});

			}

		});

	}

}( jQuery ));

            
          
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