JQuery Mobile Sliding Panel with nested menu/ mult

I have been working on multi-level menu's or sub-menu's on my jquery mobile and generally 3rd partly jquery plugins have been deeply messing with my CSS relating to position:fixed footer and scrolling.

I looked at the plugin's here and almost all of them are complicating things for me. I was hoping I could recreate this example with some magic from the existing jquery mobile framework as seen here

Left-hand Panel and submenus:

Here is a fast solution just to give you an idea. It has big room for improvement, so I will update this answer whenever I do any changes.

Create Submenus as much as you want, each one with a unique id and a close button with a class. Place Submenus inside main jQM panel.

Submenu HTML structure

<div class='ui-sub-panel' id='submenu1'>
  <div class='ui-header' data-theme='a'>
    <a href='#' class='ui-btn ui-btn-right ui-btn-icon-notext ui-icon-delete panel-close'>Close</a>
    <h1 class='ui-title'>Submenu1</h1>
  </div>
  <div class="ui-content">
    <!-- submenu contents here -->
  </div>
</div>

CSS

Full height, width and positioned outside page.

.ui-sub-panel {
  width: 100%;
  position: absolute;
  top: 0;
  left: -100%;
  min-height: 100%;
  max-height: none;
}

Open Submenu

.ui-sub-panel-open {
  -moz-transform: translate3d(100%, 0, 0);
  -webkit-transform: translate3d(100%, 0, 0);
  transform: translate3d(100%, 0, 0);
}

Close Submenu

.ui-sub-panel-close{
  -moz-transform: translate3d(0, 0, 0);
  -webkit-transform: translate3d(0, 0, 0);
  transform: translate3d(0, 0, 0);
}

Animate close/open

.ui-sub-panel-animate {
  -webkit-transition: -webkit-transform 500ms ease;
  -moz-transition: -moz-transform 500ms ease;
  transition: transform 500ms ease;
}

Close all submenus once main jQM panel is closed

$("#externalpanel").on("panelbeforeclose", function () {
  $('#submenu1, #submenu2')
      .addClass('ui-sub-panel-close ui-sub-panel-animate')
      .removeClass("ui-sub-panel-open");
});

Open first submenu

$('.sub1').on('click', function () {
  $('#submenu1')
      .addClass('ui-sub-panel-open ui-sub-panel-animate')
      .removeClass("ui-sub-panel-close");
});

Open second submenu

$('.sub2').on('click', function () {
  $('#submenu2')
     .addClass('ui-sub-panel-open ui-sub-panel-animate')
     .removeClass("ui-sub-panel-close");
});

Close Submenu where close button is clicked

$('.panel-close').on('click', function () {
  $(this)
     .closest(".ui-sub-panel")
     .addClass('ui-sub-panel-close ui-sub-panel-animate')
     .removeClass("ui-sub-panel-open");
});

Demo ⁽¹⁾

Update 1

Right-hand Panel and submenus:

To position panel to right side, add data-position="right" attribute to panel div. Also, in .ui-sub-panel class, change left to right.

.ui-sub-panel {
   ...
   right: -100%;
   ...
}

Demo ⁽¹⁾

^{(1) Tested on Safari - iPhone 5 iOS 7.0.6 & iPad 2 iOS 7.1}