docs: function PickerConstructor( ELEMENT, NAME, COMPONENT, OPTIONS ) {
  
      // If there’s no element, return the picker constructor.
      if ( !ELEMENT ) return PickerConstructor
  
  
      var
          IS_DEFAULT_THEME = false,
  
  
          // The state of the picker.
          STATE = {
              id: ELEMENT.id || 'P' + Math.abs( ~~(Math.random() * new Date()) )
          },
  
  
          // Merge the defaults and options passed.
          SETTINGS = COMPONENT ? $.extend( true, {}, COMPONENT.defaults, OPTIONS ) : OPTIONS || {},
  
  
          // Merge the default classes with the settings classes.
          CLASSES = $.extend( {}, PickerConstructor.klasses(), SETTINGS.klass ),
  
  
          // The element node wrapper into a jQuery object.
          $ELEMENT = $( ELEMENT ),
  
  
          // Pseudo picker constructor.
          PickerInstance = function() {
              return this.start()
          },
  
  
          // The picker prototype.
          P = PickerInstance.prototype = {
  
              constructor: PickerInstance,
  
              $node: $ELEMENT,
  
  
              /**
               * Initialize everything
               */
              start: function() {
  
                  // If it’s already started, do nothing.
                  if ( STATE && STATE.start ) return P
  
  
                  // Update the picker states.
                  STATE.methods = {}
                  STATE.start = true
                  STATE.open = false
                  STATE.type = ELEMENT.type
  
  
                  // Confirm focus state, convert into text input to remove UA stylings,
                  // and set as readonly to prevent keyboard popup.
                  ELEMENT.autofocus = ELEMENT == getActiveElement()
                  ELEMENT.readOnly = !SETTINGS.editable
                  ELEMENT.id = ELEMENT.id || STATE.id
                  if ( ELEMENT.type != 'text' ) {
                      ELEMENT.type = 'text'
                  }
  
  
                  // Create a new picker component with the settings.
                  P.component = new COMPONENT(P, SETTINGS)
  
  
                  // Create the picker root with a holder and then prepare it.
                  P.$root = $( PickerConstructor._.node('div', createWrappedComponent(), CLASSES.picker, 'id="' + ELEMENT.id + '_root" tabindex="0"') )
                  prepareElementRoot()
  
  
                  // If there’s a format for the hidden input element, create the element.
                  if ( SETTINGS.formatSubmit ) {
                      prepareElementHidden()
                  }
  
  
                  // Prepare the input element.
                  prepareElement()
  
  
                  // Insert the root as specified in the settings.
                  if ( SETTINGS.container ) $( SETTINGS.container ).append( P.$root )
                  else $ELEMENT.after( P.$root )
  
  
                  // Bind the default component and settings events.
                  P.on({
                      start: P.component.onStart,
                      render: P.component.onRender,
                      stop: P.component.onStop,
                      open: P.component.onOpen,
                      close: P.component.onClose,
                      set: P.component.onSet
                  }).on({
                      start: SETTINGS.onStart,
                      render: SETTINGS.onRender,
                      stop: SETTINGS.onStop,
                      open: SETTINGS.onOpen,
                      close: SETTINGS.onClose,
                      set: SETTINGS.onSet
                  })
  
  
                  // Once we’re all set, check the theme in use.
                  IS_DEFAULT_THEME = isUsingDefaultTheme( P.$root.children()[ 0 ] )
  
  
                  // If the element has autofocus, open the picker.
                  if ( ELEMENT.autofocus ) {
                      P.open()
                  }
  
  
                  // Trigger queued the “start” and “render” events.
                  return P.trigger( 'start' ).trigger( 'render' )
              }, //start
  
  
              /**
               * Render a new picker
               */
              render: function( entireComponent ) {
  
                  // Insert a new component holder in the root or box.
                  if ( entireComponent ) P.$root.html( createWrappedComponent() )
                  else P.$root.find( '.' + CLASSES.box ).html( P.component.nodes( STATE.open ) )
  
                  // Trigger the queued “render” events.
                  return P.trigger( 'render' )
              }, //render
  
  
              /**
               * Destroy everything
               */
              stop: function() {
  
                  // If it’s already stopped, do nothing.
                  if ( !STATE.start ) return P
  
                  // Then close the picker.
                  P.close()
  
                  // Remove the hidden field.
                  if ( P._hidden ) {
                      P._hidden.parentNode.removeChild( P._hidden )
                  }
  
                  // Remove the root.
                  P.$root.remove()
  
                  // Remove the input class, remove the stored data, and unbind
                  // the events (after a tick for IE - see `P.close`).
                  $ELEMENT.removeClass( CLASSES.input ).removeData( NAME )
                  setTimeout( function() {
                      $ELEMENT.off( '.' + STATE.id )
                  }, 0)
  
                  // Restore the element state
                  ELEMENT.type = STATE.type
                  ELEMENT.readOnly = false
  
                  // Trigger the queued “stop” events.
                  P.trigger( 'stop' )
  
                  // Reset the picker states.
                  STATE.methods = {}
                  STATE.start = false
  
                  return P
              }, //stop
  
  
              /**
               * Open up the picker
               */
              open: function( dontGiveFocus ) {
  
                  // If it’s already open, do nothing.
                  if ( STATE.open ) return P
  
                  // Add the “active” class.
                  $ELEMENT.addClass( CLASSES.active )
                  aria( ELEMENT, 'expanded', true )
  
                  // * A Firefox bug, when `html` has `overflow:hidden`, results in
                  //   killing transitions :(. So add the “opened” state on the next tick.
                  //   Bug: https://bugzilla.mozilla.org/show_bug.cgi?id=625289
                  setTimeout( function() {
  
                      // Add the “opened” class to the picker root.
                      P.$root.addClass( CLASSES.opened )
                      aria( P.$root[0], 'hidden', false )
  
                  }, 0 )
  
                  // If we have to give focus, bind the element and doc events.
                  if ( dontGiveFocus !== false ) {
  
                      // Set it as open.
                      STATE.open = true
  
                      // Prevent the page from scrolling.
                      if ( IS_DEFAULT_THEME ) {
                          $html.
                              css( 'overflow', 'hidden' ).
                              css( 'padding-right', '+=' + getScrollbarWidth() )
                      }
  
                      // Pass focus to the root element’s jQuery object.
                      // * Workaround for iOS8 to bring the picker’s root into view.
                      P.$root[0].focus()
  
                      // Bind the document events.
                      $document.on( 'click.' + STATE.id + ' focusin.' + STATE.id, function( event ) {
  
                          var target = event.target
  
                          // If the target of the event is not the element, close the picker picker.
                          // * Don’t worry about clicks or focusins on the root because those don’t bubble up.
                          //   Also, for Firefox, a click on an `option` element bubbles up directly
                          //   to the doc. So make sure the target wasn't the doc.
                          // * In Firefox stopPropagation() doesn’t prevent right-click events from bubbling,
                          //   which causes the picker to unexpectedly close when right-clicking it. So make
                          //   sure the event wasn’t a right-click.
                          if ( target != ELEMENT && target != document && event.which != 3 ) {
  
                              // If the target was the holder that covers the screen,
                              // keep the element focused to maintain tabindex.
                              P.close( target === P.$root.children()[0] )
                          }
  
                      }).on( 'keydown.' + STATE.id, function( event ) {
  
                          var
                              // Get the keycode.
                              keycode = event.keyCode,
  
                              // Translate that to a selection change.
                              keycodeToMove = P.component.key[ keycode ],
  
                              // Grab the target.
                              target = event.target
  
  
                          // On escape, close the picker and give focus.
                          if ( keycode == 27 ) {
                              P.close( true )
                          }
  
  
                          // Check if there is a key movement or “enter” keypress on the element.
                          else if ( target == P.$root[0] && ( keycodeToMove || keycode == 13 ) ) {
  
                              // Prevent the default action to stop page movement.
                              event.preventDefault()
  
                              // Trigger the key movement action.
                              if ( keycodeToMove ) {
                                  PickerConstructor._.trigger( P.component.key.go, P, [ PickerConstructor._.trigger( keycodeToMove ) ] )
                              }
  
                              // On “enter”, if the highlighted item isn’t disabled, set the value and close.
                              else if ( !P.$root.find( '.' + CLASSES.highlighted ).hasClass( CLASSES.disabled ) ) {
                                  P.set( 'select', P.component.item.highlight ).close()
                              }
                          }
  
  
                          // If the target is within the root and “enter” is pressed,
                          // prevent the default action and trigger a click on the target instead.
                          else if ( $.contains( P.$root[0], target ) && keycode == 13 ) {
                              event.preventDefault()
                              target.click()
                          }
                      })
                  }
  
                  // Trigger the queued “open” events.
                  return P.trigger( 'open' )
              }, //open
  
  
              /**
               * Close the picker
               */
              close: function( giveFocus ) {
  
                  // If we need to give focus, do it before changing states.
                  if ( giveFocus ) {
                      // ....ah yes! It would’ve been incomplete without a crazy workaround for IE :|
                      // The focus is triggered *after* the close has completed - causing it
                      // to open again. So unbind and rebind the event at the next tick.
                      P.$root.off( 'focus.toOpen' )[0].focus()
                      setTimeout( function() {
                          P.$root.on( 'focus.toOpen', handleFocusToOpenEvent )
                      }, 0 )
                  }
  
                  // Remove the “active” class.
                  $ELEMENT.removeClass( CLASSES.active )
                  aria( ELEMENT, 'expanded', false )
  
                  // * A Firefox bug, when `html` has `overflow:hidden`, results in
                  //   killing transitions :(. So remove the “opened” state on the next tick.
                  //   Bug: https://bugzilla.mozilla.org/show_bug.cgi?id=625289
                  setTimeout( function() {
  
                      // Remove the “opened” and “focused” class from the picker root.
                      P.$root.removeClass( CLASSES.opened + ' ' + CLASSES.focused )
                      aria( P.$root[0], 'hidden', true )
  
                  }, 0 )
  
                  // If it’s already closed, do nothing more.
                  if ( !STATE.open ) return P
  
                  // Set it as closed.
                  STATE.open = false
  
                  // Allow the page to scroll.
                  if ( IS_DEFAULT_THEME ) {
                      $html.
                          css( 'overflow', '' ).
                          css( 'padding-right', '-=' + getScrollbarWidth() )
                  }
  
                  // Unbind the document events.
                  $document.off( '.' + STATE.id )
  
                  // Trigger the queued “close” events.
                  return P.trigger( 'close' )
              }, //close
  
  
              /**
               * Clear the values
               */
              clear: function( options ) {
                  return P.set( 'clear', null, options )
              }, //clear
  
  
              /**
               * Set something
               */
              set: function( thing, value, options ) {
  
                  var thingItem, thingValue,
                      thingIsObject = $.isPlainObject( thing ),
                      thingObject = thingIsObject ? thing : {}
  
                  // Make sure we have usable options.
                  options = thingIsObject && $.isPlainObject( value ) ? value : options || {}
  
                  if ( thing ) {
  
                      // If the thing isn’t an object, make it one.
                      if ( !thingIsObject ) {
                          thingObject[ thing ] = value
                      }
  
                      // Go through the things of items to set.
                      for ( thingItem in thingObject ) {
  
                          // Grab the value of the thing.
                          thingValue = thingObject[ thingItem ]
  
                          // First, if the item exists and there’s a value, set it.
                          if ( thingItem in P.component.item ) {
                              if ( thingValue === undefined ) thingValue = null
                              P.component.set( thingItem, thingValue, options )
                          }
  
                          // Then, check to update the element value and broadcast a change.
                          if ( thingItem == 'select' || thingItem == 'clear' ) {
                              $ELEMENT.
                                  val( thingItem == 'clear' ? '' : P.get( thingItem, SETTINGS.format ) ).
                                  trigger( 'change' )
                          }
                      }
  
                      // Render a new picker.
                      P.render()
                  }
  
                  // When the method isn’t muted, trigger queued “set” events and pass the `thingObject`.
                  return options.muted ? P : P.trigger( 'set', thingObject )
              }, //set
  
  
              /**
               * Get something
               */
              get: function( thing, format ) {
  
                  // Make sure there’s something to get.
                  thing = thing || 'value'
  
                  // If a picker state exists, return that.
                  if ( STATE[ thing ] != null ) {
                      return STATE[ thing ]
                  }
  
                  // Return the submission value, if that.
                  if ( thing == 'valueSubmit' ) {
                      if ( P._hidden ) {
                          return P._hidden.value
                      }
                      thing = 'value'
                  }
  
                  // Return the value, if that.
                  if ( thing == 'value' ) {
                      return ELEMENT.value
                  }
  
                  // Check if a component item exists, return that.
                  if ( thing in P.component.item ) {
                      if ( typeof format == 'string' ) {
                          var thingValue = P.component.get( thing )
                          return thingValue ?
                              PickerConstructor._.trigger(
                                  P.component.formats.toString,
                                  P.component,
                                  [ format, thingValue ]
                              ) : ''
                      }
                      return P.component.get( thing )
                  }
              }, //get
  
  
  
              /**
               * Bind events on the things.
               */
              on: function( thing, method, internal ) {
  
                  var thingName, thingMethod,
                      thingIsObject = $.isPlainObject( thing ),
                      thingObject = thingIsObject ? thing : {}
  
                  if ( thing ) {
  
                      // If the thing isn’t an object, make it one.
                      if ( !thingIsObject ) {
                          thingObject[ thing ] = method
                      }
  
                      // Go through the things to bind to.
                      for ( thingName in thingObject ) {
  
                          // Grab the method of the thing.
                          thingMethod = thingObject[ thingName ]
  
                          // If it was an internal binding, prefix it.
                          if ( internal ) {
                              thingName = '_' + thingName
                          }
  
                          // Make sure the thing methods collection exists.
                          STATE.methods[ thingName ] = STATE.methods[ thingName ] || []
  
                          // Add the method to the relative method collection.
                          STATE.methods[ thingName ].push( thingMethod )
                      }
                  }
  
                  return P
              }, //on
  
  
  
              /**
               * Unbind events on the things.
               */
              off: function() {
                  var i, thingName,
                      names = arguments;
                  for ( i = 0, namesCount = names.length; i < namesCount; i += 1 ) {
                      thingName = names[i]
                      if ( thingName in STATE.methods ) {
                          delete STATE.methods[thingName]
                      }
                  }
                  return P
              },
  
  
              /**
               * Fire off method events.
               */
              trigger: function( name, data ) {
                  var _trigger = function( name ) {
                      var methodList = STATE.methods[ name ]
                      if ( methodList ) {
                          methodList.map( function( method ) {
                              PickerConstructor._.trigger( method, P, [ data ] )
                          })
                      }
                  }
                  _trigger( '_' + name )
                  _trigger( name )
                  return P
              } //trigger
          } //PickerInstance.prototype
  
  
      /**
       * Wrap the picker holder components together.
       */
      function createWrappedComponent() {
  
          // Create a picker wrapper holder
          return PickerConstructor._.node( 'div',
  
              // Create a picker wrapper node
              PickerConstructor._.node( 'div',
  
                  // Create a picker frame
                  PickerConstructor._.node( 'div',
  
                      // Create a picker box node
                      PickerConstructor._.node( 'div',
  
                          // Create the components nodes.
                          P.component.nodes( STATE.open ),
  
                          // The picker box class
                          CLASSES.box
                      ),
  
                      // Picker wrap class
                      CLASSES.wrap
                  ),
  
                  // Picker frame class
                  CLASSES.frame
              ),
  
              // Picker holder class
              CLASSES.holder
          ) //endreturn
      } //createWrappedComponent
  
  
  
      /**
       * Prepare the input element with all bindings.
       */
      function prepareElement() {
  
          $ELEMENT.
  
              // Store the picker data by component name.
              data(NAME, P).
  
              // Add the “input” class name.
              addClass(CLASSES.input).
  
              // Remove the tabindex.
              attr('tabindex', -1).
  
              // If there’s a `data-value`, update the value of the element.
              val( $ELEMENT.data('value') ?
                  P.get('select', SETTINGS.format) :
                  ELEMENT.value
              )
  
  
          // Only bind keydown events if the element isn’t editable.
          if ( !SETTINGS.editable ) {
  
              $ELEMENT.
  
                  // On focus/click, focus onto the root to open it up.
                  on( 'focus.' + STATE.id + ' click.' + STATE.id, function( event ) {
                      event.preventDefault()
                      P.$root[0].focus()
                  }).
  
                  // Handle keyboard event based on the picker being opened or not.
                  on( 'keydown.' + STATE.id, handleKeydownEvent )
          }
  
  
          // Update the aria attributes.
          aria(ELEMENT, {
              haspopup: true,
              expanded: false,
              readonly: false,
              owns: ELEMENT.id + '_root'
          })
      }
  
  
      /**
       * Prepare the root picker element with all bindings.
       */
      function prepareElementRoot() {
  
          P.$root.
  
              on({
  
                  // For iOS8.
                  keydown: handleKeydownEvent,
  
                  // When something within the root is focused, stop from bubbling
                  // to the doc and remove the “focused” state from the root.
                  focusin: function( event ) {
                      P.$root.removeClass( CLASSES.focused )
                      event.stopPropagation()
                  },
  
                  // When something within the root holder is clicked, stop it
                  // from bubbling to the doc.
                  'mousedown click': function( event ) {
  
                      var target = event.target
  
                      // Make sure the target isn’t the root holder so it can bubble up.
                      if ( target != P.$root.children()[ 0 ] ) {
  
                          event.stopPropagation()
  
                          // * For mousedown events, cancel the default action in order to
                          //   prevent cases where focus is shifted onto external elements
                          //   when using things like jQuery mobile or MagnificPopup (ref: #249 & #120).
                          //   Also, for Firefox, don’t prevent action on the `option` element.
                          if ( event.type == 'mousedown' && !$( target ).is( 'input, select, textarea, button, option' )) {
  
                              event.preventDefault()
  
                              // Re-focus onto the root so that users can click away
                              // from elements focused within the picker.
                              P.$root[0].focus()
                          }
                      }
                  }
              }).
  
              // Add/remove the “target” class on focus and blur.
              on({
                  focus: function() {
                      $ELEMENT.addClass( CLASSES.target )
                  },
                  blur: function() {
                      $ELEMENT.removeClass( CLASSES.target )
                  }
              }).
  
              // Open the picker and adjust the root “focused” state
              on( 'focus.toOpen', handleFocusToOpenEvent ).
  
              // If there’s a click on an actionable element, carry out the actions.
              on( 'click', '[data-pick], [data-nav], [data-clear], [data-close]', function() {
  
                  var $target = $( this ),
                      targetData = $target.data(),
                      targetDisabled = $target.hasClass( CLASSES.navDisabled ) || $target.hasClass( CLASSES.disabled ),
  
                      // * For IE, non-focusable elements can be active elements as well
                      //   (http://stackoverflow.com/a/2684561).
                      activeElement = getActiveElement()
                      activeElement = activeElement && ( activeElement.type || activeElement.href )
  
                  // If it’s disabled or nothing inside is actively focused, re-focus the element.
                  if ( targetDisabled || activeElement && !$.contains( P.$root[0], activeElement ) ) {
                      P.$root[0].focus()
                  }
  
                  // If something is superficially changed, update the `highlight` based on the `nav`.
                  if ( !targetDisabled && targetData.nav ) {
                      P.set( 'highlight', P.component.item.highlight, { nav: targetData.nav } )
                  }
  
                  // If something is picked, set `select` then close with focus.
                  else if ( !targetDisabled && 'pick' in targetData ) {
                      P.set( 'select', targetData.pick )
                  }
  
                  // If a “clear” button is pressed, empty the values and close with focus.
                  else if ( targetData.clear ) {
                      P.clear().close( true )
                  }
  
                  else if ( targetData.close ) {
                      P.close( true )
                  }
  
              }) //P.$root
  
          aria( P.$root[0], 'hidden', true )
      }
  
  
       /**
        * Prepare the hidden input element along with all bindings.
        */
      function prepareElementHidden() {
  
          var name
  
          if ( SETTINGS.hiddenName === true ) {
              name = ELEMENT.name
              ELEMENT.name = ''
          }
          else {
              name = [
                  typeof SETTINGS.hiddenPrefix == 'string' ? SETTINGS.hiddenPrefix : '',
                  typeof SETTINGS.hiddenSuffix == 'string' ? SETTINGS.hiddenSuffix : '_submit'
              ]
              name = name[0] + ELEMENT.name + name[1]
          }
  
          P._hidden = $(
              '<input ' +
              'type=hidden ' +
  
              // Create the name using the original input’s with a prefix and suffix.
              'name="' + name + '"' +
  
              // If the element has a value, set the hidden value as well.
              (
                  $ELEMENT.data('value') || ELEMENT.value ?
                      ' value="' + P.get('select', SETTINGS.formatSubmit) + '"' :
                      ''
              ) +
              '>'
          )[0]
  
          $ELEMENT.
  
              // If the value changes, update the hidden input with the correct format.
              on('change.' + STATE.id, function() {
                  P._hidden.value = ELEMENT.value ?
                      P.get('select', SETTINGS.formatSubmit) :
                      ''
              })
  
  
          // Insert the hidden input as specified in the settings.
          if ( SETTINGS.container ) $( SETTINGS.container ).append( P._hidden )
          else $ELEMENT.after( P._hidden )
      }
  
  
      // For iOS8.
      function handleKeydownEvent( event ) {
  
          var keycode = event.keyCode,
  
              // Check if one of the delete keys was pressed.
              isKeycodeDelete = /^(8|46)$/.test(keycode)
  
          // For some reason IE clears the input value on “escape”.
          if ( keycode == 27 ) {
              P.close()
              return false
          }
  
          // Check if `space` or `delete` was pressed or the picker is closed with a key movement.
          if ( keycode == 32 || isKeycodeDelete || !STATE.open && P.component.key[keycode] ) {
  
              // Prevent it from moving the page and bubbling to doc.
              event.preventDefault()
              event.stopPropagation()
  
              // If `delete` was pressed, clear the values and close the picker.
              // Otherwise open the picker.
              if ( isKeycodeDelete ) { P.clear().close() }
              else { P.open() }
          }
      }
  
  
      // Separated for IE
      function handleFocusToOpenEvent( event ) {
  
          // Stop the event from propagating to the doc.
          event.stopPropagation()
  
          // If it’s a focus event, add the “focused” class to the root.
          if ( event.type == 'focus' ) {
              P.$root.addClass( CLASSES.focused )
          }
  
          // And then finally open the picker.
          P.open()
      }
  
  
      // Return a new picker instance.
      return new PickerInstance()
  }