Automatically scroll the document when the draggable is moved beyond the viewport. Set the scroll option to true to enable auto-scrolling, and fine-tune when scrolling is triggered and its speed with the scrollSensitivity and scrollSpeed options.

<!doctype html>
<html lang="en">
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>jQuery UI Draggable - Auto-scroll</title>
  <link rel="stylesheet" href="//">
  <link rel="stylesheet" href="/resources/demos/style.css">
  #draggable, #draggable2, #draggable3 { width: 100px; height: 100px; padding: 0.5em; float: left; margin: 0 10px 10px 0; }
  <script src=""></script>
  <script src=""></script>
  $( function() {
    $( "#draggable" ).draggable({ scroll: true });
    $( "#draggable2" ).draggable({ scroll: true, scrollSensitivity: 100 });
    $( "#draggable3" ).draggable({ scroll: true, scrollSpeed: 100 });
  } );
<div id="draggable" class="ui-widget-content">
  <p>Scroll set to true, default settings</p>
<div id="draggable2" class="ui-widget-content">
  <p>scrollSensitivity set to 100</p>
<div id="draggable3" class="ui-widget-content">
  <p>scrollSpeed set to 100</p>
<div style="height: 5000px; width: 1px;"></div>