Scroll the page on drag with jQuery

Question

I have tried using kinetic.js and the code below, however when I try this in IE11 it keeps jumping to the top every time I scroll:

$(\"html\").kinetic();
         


        

Answer 1

You can do this quite simply by recording the position of the mouse when clicked, and the current position when being dragged. Try this:

var clicked = false, clickY;
$(document).on({
    'mousemove': function(e) {
        clicked && updateScrollPos(e);
    },
    'mousedown': function(e) {
        clicked = true;
        clickY = e.pageY;
    },
    'mouseup': function() {
        clicked = false;
        $('html').css('cursor', 'auto');
    }
});

var updateScrollPos = function(e) {
    $('html').css('cursor', 'row-resize');
    $(window).scrollTop($(window).scrollTop() + (clickY - e.pageY));
}

To prevent text selection while dragging, add the following CSS:

body {
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

Example fiddle

---

Update

Here's an version of the above as a jQuery plugin, extended to allow both vertical and horizontal scrolling via the settings. It also allows you to change the cursor that's used too.

(function($) {
  $.dragScroll = function(options) {
    var settings = $.extend({
      scrollVertical: true,
      scrollHorizontal: true,
      cursor: null
    }, options);

    var clicked = false,
      clickY, clickX;

    var getCursor = function() {
      if (settings.cursor) return settings.cursor;
      if (settings.scrollVertical && settings.scrollHorizontal) return 'move';
      if (settings.scrollVertical) return 'row-resize';
      if (settings.scrollHorizontal) return 'col-resize';
    }

    var updateScrollPos = function(e, el) {
      $('html').css('cursor', getCursor());
      var $el = $(el);
      settings.scrollVertical && $el.scrollTop($el.scrollTop() + (clickY - e.pageY));
      settings.scrollHorizontal && $el.scrollLeft($el.scrollLeft() + (clickX - e.pageX));
    }

    $(document).on({
      'mousemove': function(e) {
        clicked && updateScrollPos(e, this);
      },
      'mousedown': function(e) {
        clicked = true;
        clickY = e.pageY;
        clickX = e.pageX;
      },
      'mouseup': function() {
        clicked = false;
        $('html').css('cursor', 'auto');
      }
    });
  }
}(jQuery))

$.dragScroll();

/* Note: CSS is not relevant to the solution. 
   This is only needed for this demonstration */

body,
html {
  padding: 0;
  margin: 0;
}

div {
  height: 1000px;
  width: 2000px;
  border-bottom: 3px dashed #EEE;
  /* gradient is only to make the scroll movement more obvious */
  background: rgba(201, 2, 2, 1);
  background: -moz-linear-gradient(-125deg, rgba(201, 2, 2, 1) 0%, rgba(204, 0, 204, 1) 16%, rgba(94, 0, 201, 1) 31%, rgba(0, 153, 199, 1) 43%, rgba(0, 199, 119, 1) 56%, rgba(136, 199, 0, 1) 69%, rgba(199, 133, 0, 1) 83%, rgba(107, 0, 0, 1) 100%);
  background: -webkit-gradient(left top, right bottom, color-stop(0%, rgba(201, 2, 2, 1)), color-stop(16%, rgba(204, 0, 204, 1)), color-stop(31%, rgba(94, 0, 201, 1)), color-stop(43%, rgba(0, 153, 199, 1)), color-stop(56%, rgba(0, 199, 119, 1)), color-stop(69%, rgba(136, 199, 0, 1)), color-stop(83%, rgba(199, 133, 0, 1)), color-stop(100%, rgba(107, 0, 0, 1)));
  background: -webkit-linear-gradient(-125deg, rgba(201, 2, 2, 1) 0%, rgba(204, 0, 204, 1) 16%, rgba(94, 0, 201, 1) 31%, rgba(0, 153, 199, 1) 43%, rgba(0, 199, 119, 1) 56%, rgba(136, 199, 0, 1) 69%, rgba(199, 133, 0, 1) 83%, rgba(107, 0, 0, 1) 100%);
  background: -o-linear-gradient(-125deg, rgba(201, 2, 2, 1) 0%, rgba(204, 0, 204, 1) 16%, rgba(94, 0, 201, 1) 31%, rgba(0, 153, 199, 1) 43%, rgba(0, 199, 119, 1) 56%, rgba(136, 199, 0, 1) 69%, rgba(199, 133, 0, 1) 83%, rgba(107, 0, 0, 1) 100%);
  background: -ms-linear-gradient(-125deg, rgba(201, 2, 2, 1) 0%, rgba(204, 0, 204, 1) 16%, rgba(94, 0, 201, 1) 31%, rgba(0, 153, 199, 1) 43%, rgba(0, 199, 119, 1) 56%, rgba(136, 199, 0, 1) 69%, rgba(199, 133, 0, 1) 83%, rgba(107, 0, 0, 1) 100%);
  background: linear-gradient(-110deg, rgba(201, 2, 2, 1) 0%, rgba(204, 0, 204, 1) 16%, rgba(94, 0, 201, 1) 31%, rgba(0, 153, 199, 1) 43%, rgba(0, 199, 119, 1) 56%, rgba(136, 199, 0, 1) 69%, rgba(199, 133, 0, 1) 83%, rgba(107, 0, 0, 1) 100%);
  filter: progid: DXImageTransform.Microsoft.gradient( startColorstr='#c90202', endColorstr='#6b0000', GradientType=1);
  color: #EEE;
  padding: 20px;
  font-size: 2em;
}

body {
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

First...

Second...