/*! drop 0.5.4 */
/*! tether 0.6.5 */


(function(root, factory) {
  if (typeof define === 'function' && define.amd) {
    define(factory);
  } else if (typeof exports === 'object') {
    module.exports = factory(require,exports,module);
  } else {
    root.Tether = factory();
  }
}(this, function(require,exports,module) {

(function() {
  var Evented, addClass, defer, deferred, extend, flush, getBounds, getOffsetParent, getOrigin, getScrollBarSize, getScrollParent, hasClass, node, removeClass, uniqueId, updateClasses, zeroPosCache,
    __hasProp = {}.hasOwnProperty,
    __indexOf = [].indexOf || function(item) { for (var i = 0, l = this.length; i < l; i++) { if (i in this && this[i] === item) return i; } return -1; },
    __slice = [].slice;

  if (this.Tether == null) {
    this.Tether = {
      modules: []
    };
  }

  getScrollParent = function(el) {
    var parent, position, scrollParent, style, _ref;
    position = getComputedStyle(el).position;
    if (position === 'fixed') {
      return el;
    }
    scrollParent = void 0;
    parent = el;
    while (parent = parent.parentNode) {
      try {
        style = getComputedStyle(parent);
      } catch (_error) {}
      if (style == null) {
        return parent;
      }
      if (/(auto|scroll)/.test(style['overflow'] + style['overflow-y'] + style['overflow-x'])) {
        if (position !== 'absolute' || ((_ref = style['position']) === 'relative' || _ref === 'absolute' || _ref === 'fixed')) {
          return parent;
        }
      }
    }
    return document.body;
  };

  uniqueId = (function() {
    var id;
    id = 0;
    return function() {
      return id++;
    };
  })();

  zeroPosCache = {};

  getOrigin = function(doc) {
    var id, k, node, v, _ref;
    node = doc._tetherZeroElement;
    if (node == null) {
      node = doc.createElement('div');
      node.setAttribute('data-tether-id', uniqueId());
      extend(node.style, {
        top: 0,
        left: 0,
        position: 'absolute'
      });
      doc.body.appendChild(node);
      doc._tetherZeroElement = node;
    }
    id = node.getAttribute('data-tether-id');
    if (zeroPosCache[id] == null) {
      zeroPosCache[id] = {};
      _ref = node.getBoundingClientRect();
      for (k in _ref) {
        v = _ref[k];
        zeroPosCache[id][k] = v;
      }
      defer(function() {
        return zeroPosCache[id] = void 0;
      });
    }
    return zeroPosCache[id];
  };

  node = null;

  getBounds = function(el) {
    var box, doc, docEl, k, origin, v, _ref;
    if (el === document) {
      doc = document;
      el = document.documentElement;
    } else {
      doc = el.ownerDocument;
    }
    docEl = doc.documentElement;
    box = {};
    _ref = el.getBoundingClientRect();
    for (k in _ref) {
      v = _ref[k];
      box[k] = v;
    }
    origin = getOrigin(doc);
    box.top -= origin.top;
    box.left -= origin.left;
    if (box.width == null) {
      box.width = document.body.scrollWidth - box.left - box.right;
    }
    if (box.height == null) {
      box.height = document.body.scrollHeight - box.top - box.bottom;
    }
    box.top = box.top - docEl.clientTop;
    box.left = box.left - docEl.clientLeft;
    box.right = doc.body.clientWidth - box.width - box.left;
    box.bottom = doc.body.clientHeight - box.height - box.top;
    return box;
  };

  getOffsetParent = function(el) {
    return el.offsetParent || document.documentElement;
  };

  getScrollBarSize = function() {
    var inner, outer, width, widthContained, widthScroll;
    inner = document.createElement('div');
    inner.style.width = '100%';
    inner.style.height = '200px';
    outer = document.createElement('div');
    extend(outer.style, {
      position: 'absolute',
      top: 0,
      left: 0,
      pointerEvents: 'none',
      visibility: 'hidden',
      width: '200px',
      height: '150px',
      overflow: 'hidden'
    });
    outer.appendChild(inner);
    document.body.appendChild(outer);
    widthContained = inner.offsetWidth;
    outer.style.overflow = 'scroll';
    widthScroll = inner.offsetWidth;
    if (widthContained === widthScroll) {
      widthScroll = outer.clientWidth;
    }
    document.body.removeChild(outer);
    width = widthContained - widthScroll;
    return {
      width: width,
      height: width
    };
  };

  extend = function(out) {
    var args, key, obj, val, _i, _len, _ref;
    if (out == null) {
      out = {};
    }
    args = [];
    Array.prototype.push.apply(args, arguments);
    _ref = args.slice(1);
    for (_i = 0, _len = _ref.length; _i < _len; _i++) {
      obj = _ref[_i];
      if (obj) {
        for (key in obj) {
          if (!__hasProp.call(obj, key)) continue;
          val = obj[key];
          out[key] = val;
        }
      }
    }
    return out;
  };

  removeClass = function(el, name) {
    var cls, _i, _len, _ref, _results;
    if (el.classList != null) {
      _ref = name.split(' ');
      _results = [];
      for (_i = 0, _len = _ref.length; _i < _len; _i++) {
        cls = _ref[_i];
        if (cls.trim()) {
          _results.push(el.classList.remove(cls));
        }
      }
      return _results;
    } else {
      return el.className = el.className.replace(new RegExp("(^| )" + (name.split(' ').join('|')) + "( |$)", 'gi'), ' ');
    }
  };

  addClass = function(el, name) {
    var cls, _i, _len, _ref, _results;
    if (el.classList != null) {
      _ref = name.split(' ');
      _results = [];
      for (_i = 0, _len = _ref.length; _i < _len; _i++) {
        cls = _ref[_i];
        if (cls.trim()) {
          _results.push(el.classList.add(cls));
        }
      }
      return _results;
    } else {
      removeClass(el, name);
      return el.className += " " + name;
    }
  };

  hasClass = function(el, name) {
    if (el.classList != null) {
      return el.classList.contains(name);
    } else {
      return new RegExp("(^| )" + name + "( |$)", 'gi').test(el.className);
    }
  };

  updateClasses = function(el, add, all) {
    var cls, _i, _j, _len, _len1, _results;
    for (_i = 0, _len = all.length; _i < _len; _i++) {
      cls = all[_i];
      if (__indexOf.call(add, cls) < 0) {
        if (hasClass(el, cls)) {
          removeClass(el, cls);
        }
      }
    }
    _results = [];
    for (_j = 0, _len1 = add.length; _j < _len1; _j++) {
      cls = add[_j];
      if (!hasClass(el, cls)) {
        _results.push(addClass(el, cls));
      } else {
        _results.push(void 0);
      }
    }
    return _results;
  };

  deferred = [];

  defer = function(fn) {
    return deferred.push(fn);
  };

  flush = function() {
    var fn, _results;
    _results = [];
    while (fn = deferred.pop()) {
      _results.push(fn());
    }
    return _results;
  };

  Evented = (function() {
    function Evented() {}

    Evented.prototype.on = function(event, handler, ctx, once) {
      var _base;
      if (once == null) {
        once = false;
      }
      if (this.bindings == null) {
        this.bindings = {};
      }
      if ((_base = this.bindings)[event] == null) {
        _base[event] = [];
      }
      return this.bindings[event].push({
        handler: handler,
        ctx: ctx,
        once: once
      });
    };

    Evented.prototype.once = function(event, handler, ctx) {
      return this.on(event, handler, ctx, true);
    };

    Evented.prototype.off = function(event, handler) {
      var i, _ref, _results;
      if (((_ref = this.bindings) != null ? _ref[event] : void 0) == null) {
        return;
      }
      if (handler == null) {
        return delete this.bindings[event];
      } else {
        i = 0;
        _results = [];
        while (i < this.bindings[event].length) {
          if (this.bindings[event][i].handler === handler) {
            _results.push(this.bindings[event].splice(i, 1));
          } else {
            _results.push(i++);
          }
        }
        return _results;
      }
    };

    Evented.prototype.trigger = function() {
      var args, ctx, event, handler, i, once, _ref, _ref1, _results;
      event = arguments[0], args = 2 <= arguments.length ? __slice.call(arguments, 1) : [];
      if ((_ref = this.bindings) != null ? _ref[event] : void 0) {
        i = 0;
        _results = [];
        while (i < this.bindings[event].length) {
          _ref1 = this.bindings[event][i], handler = _ref1.handler, ctx = _ref1.ctx, once = _ref1.once;
          handler.apply(ctx != null ? ctx : this, args);
          if (once) {
            _results.push(this.bindings[event].splice(i, 1));
          } else {
            _results.push(i++);
          }
        }
        return _results;
      }
    };

    return Evented;

  })();

  this.Tether.Utils = {
    getScrollParent: getScrollParent,
    getBounds: getBounds,
    getOffsetParent: getOffsetParent,
    extend: extend,
    addClass: addClass,
    removeClass: removeClass,
    hasClass: hasClass,
    updateClasses: updateClasses,
    defer: defer,
    flush: flush,
    uniqueId: uniqueId,
    Evented: Evented,
    getScrollBarSize: getScrollBarSize
  };

}).call(this);

(function() {
  var MIRROR_LR, MIRROR_TB, OFFSET_MAP, Tether, addClass, addOffset, attachmentToOffset, autoToFixedAttachment, defer, extend, flush, getBounds, getOffsetParent, getOuterSize, getScrollBarSize, getScrollParent, getSize, now, offsetToPx, parseAttachment, parseOffset, position, removeClass, tethers, transformKey, updateClasses, within, _Tether, _ref,
    __slice = [].slice,
    __bind = function(fn, me){ return function(){ return fn.apply(me, arguments); }; };

  if (this.Tether == null) {
    throw new Error("You must include the utils.js file before tether.js");
  }

  Tether = this.Tether;

  _ref = Tether.Utils, getScrollParent = _ref.getScrollParent, getSize = _ref.getSize, getOuterSize = _ref.getOuterSize, getBounds = _ref.getBounds, getOffsetParent = _ref.getOffsetParent, extend = _ref.extend, addClass = _ref.addClass, removeClass = _ref.removeClass, updateClasses = _ref.updateClasses, defer = _ref.defer, flush = _ref.flush, getScrollBarSize = _ref.getScrollBarSize;

  within = function(a, b, diff) {
    if (diff == null) {
      diff = 1;
    }
    return (a + diff >= b && b >= a - diff);
  };

  transformKey = (function() {
    var el, key, _i, _len, _ref1;
    el = document.createElement('div');
    _ref1 = ['transform', 'webkitTransform', 'OTransform', 'MozTransform', 'msTransform'];
    for (_i = 0, _len = _ref1.length; _i < _len; _i++) {
      key = _ref1[_i];
      if (el.style[key] !== void 0) {
        return key;
      }
    }
  })();

  tethers = [];

  position = function() {
    var tether, _i, _len;
    for (_i = 0, _len = tethers.length; _i < _len; _i++) {
      tether = tethers[_i];
      tether.position(false);
    }
    return flush();
  };

  now = function() {
    var _ref1;
    return (_ref1 = typeof performance !== "undefined" && performance !== null ? typeof performance.now === "function" ? performance.now() : void 0 : void 0) != null ? _ref1 : +(new Date);
  };

  (function() {
    var event, lastCall, lastDuration, pendingTimeout, tick, _i, _len, _ref1, _results;
    lastCall = null;
    lastDuration = null;
    pendingTimeout = null;
    tick = function() {
      if ((lastDuration != null) && lastDuration > 16) {
        lastDuration = Math.min(lastDuration - 16, 250);
        pendingTimeout = setTimeout(tick, 250);
        return;
      }
      if ((lastCall != null) && (now() - lastCall) < 10) {
        return;
      }
      if (pendingTimeout != null) {
        clearTimeout(pendingTimeout);
        pendingTimeout = null;
      }
      lastCall = now();
      position();
      return lastDuration = now() - lastCall;
    };
    _ref1 = ['resize', 'scroll', 'touchmove'];
    _results = [];
    for (_i = 0, _len = _ref1.length; _i < _len; _i++) {
      event = _ref1[_i];
      _results.push(window.addEventListener(event, tick));
    }
    return _results;
  })();

  MIRROR_LR = {
    center: 'center',
    left: 'right',
    right: 'left'
  };

  MIRROR_TB = {
    middle: 'middle',
    top: 'bottom',
    bottom: 'top'
  };

  OFFSET_MAP = {
    top: 0,
    left: 0,
    middle: '50%',
    center: '50%',
    bottom: '100%',
    right: '100%'
  };

  autoToFixedAttachment = function(attachment, relativeToAttachment) {
    var left, top;
    left = attachment.left, top = attachment.top;
    if (left === 'auto') {
      left = MIRROR_LR[relativeToAttachment.left];
    }
    if (top === 'auto') {
      top = MIRROR_TB[relativeToAttachment.top];
    }
    return {
      left: left,
      top: top
    };
  };

  attachmentToOffset = function(attachment) {
    var _ref1, _ref2;
    return {
      left: (_ref1 = OFFSET_MAP[attachment.left]) != null ? _ref1 : attachment.left,
      top: (_ref2 = OFFSET_MAP[attachment.top]) != null ? _ref2 : attachment.top
    };
  };

  addOffset = function() {
    var left, offsets, out, top, _i, _len, _ref1;
    offsets = 1 <= arguments.length ? __slice.call(arguments, 0) : [];
    out = {
      top: 0,
      left: 0
    };
    for (_i = 0, _len = offsets.length; _i < _len; _i++) {
      _ref1 = offsets[_i], top = _ref1.top, left = _ref1.left;
      if (typeof top === 'string') {
        top = parseFloat(top, 10);
      }
      if (typeof left === 'string') {
        left = parseFloat(left, 10);
      }
      out.top += top;
      out.left += left;
    }
    return out;
  };

  offsetToPx = function(offset, size) {
    if (typeof offset.left === 'string' && offset.left.indexOf('%') !== -1) {
      offset.left = parseFloat(offset.left, 10) / 100 * size.width;
    }
    if (typeof offset.top === 'string' && offset.top.indexOf('%') !== -1) {
      offset.top = parseFloat(offset.top, 10) / 100 * size.height;
    }
    return offset;
  };

  parseAttachment = parseOffset = function(value) {
    var left, top, _ref1;
    _ref1 = value.split(' '), top = _ref1[0], left = _ref1[1];
    return {
      top: top,
      left: left
    };
  };

  _Tether = (function() {
    _Tether.modules = [];

    function _Tether(options) {
      this.position = __bind(this.position, this);
      var module, _i, _len, _ref1, _ref2;
      tethers.push(this);
      this.history = [];
      this.setOptions(options, false);
      _ref1 = Tether.modules;
      for (_i = 0, _len = _ref1.length; _i < _len; _i++) {
        module = _ref1[_i];
        if ((_ref2 = module.initialize) != null) {
          _ref2.call(this);
        }
      }
      this.position();
    }

    _Tether.prototype.getClass = function(key) {
      var _ref1, _ref2;
      if ((_ref1 = this.options.classes) != null ? _ref1[key] : void 0) {
        return this.options.classes[key];
      } else if (((_ref2 = this.options.classes) != null ? _ref2[key] : void 0) !== false) {
        if (this.options.classPrefix) {
          return "" + this.options.classPrefix + "-" + key;
        } else {
          return key;
        }
      } else {
        return '';
      }
    };

    _Tether.prototype.setOptions = function(options, position) {
      var defaults, key, _i, _len, _ref1, _ref2;
      this.options = options;
      if (position == null) {
        position = true;
      }
      defaults = {
        offset: '0 0',
        targetOffset: '0 0',
        targetAttachment: 'auto auto',
        classPrefix: 'tether'
      };
      this.options = extend(defaults, this.options);
      _ref1 = this.options, this.element = _ref1.element, this.target = _ref1.target, this.targetModifier = _ref1.targetModifier;
      if (this.target === 'viewport') {
        this.target = document.body;
        this.targetModifier = 'visible';
      } else if (this.target === 'scroll-handle') {
        this.target = document.body;
        this.targetModifier = 'scroll-handle';
      }
      _ref2 = ['element', 'target'];
      for (_i = 0, _len = _ref2.length; _i < _len; _i++) {
        key = _ref2[_i];
        if (this[key] == null) {
          throw new Error("Tether Error: Both element and target must be defined");
        }
        if (this[key].jquery != null) {
          this[key] = this[key][0];
        } else if (typeof this[key] === 'string') {
          this[key] = document.querySelector(this[key]);
        }
      }
      addClass(this.element, this.getClass('element'));
      addClass(this.target, this.getClass('target'));
      if (!this.options.attachment) {
        throw new Error("Tether Error: You must provide an attachment");
      }
      this.targetAttachment = parseAttachment(this.options.targetAttachment);
      this.attachment = parseAttachment(this.options.attachment);
      this.offset = parseOffset(this.options.offset);
      this.targetOffset = parseOffset(this.options.targetOffset);
      if (this.scrollParent != null) {
        this.disable();
      }
      if (this.targetModifier === 'scroll-handle') {
        this.scrollParent = this.target;
      } else {
        this.scrollParent = getScrollParent(this.target);
      }
      if (this.options.enabled !== false) {
        return this.enable(position);
      }
    };

    _Tether.prototype.getTargetBounds = function() {
      var bounds, fitAdj, hasBottomScroll, height, out, scrollBottom, scrollPercentage, style, target;
      if (this.targetModifier != null) {
        switch (this.targetModifier) {
          case 'visible':
            if (this.target === document.body) {
              return {
                top: pageYOffset,
                left: pageXOffset,
                height: innerHeight,
                width: innerWidth
              };
            } else {
              bounds = getBounds(this.target);
              out = {
                height: bounds.height,
                width: bounds.width,
                top: bounds.top,
                left: bounds.left
              };
              out.height = Math.min(out.height, bounds.height - (pageYOffset - bounds.top));
              out.height = Math.min(out.height, bounds.height - ((bounds.top + bounds.height) - (pageYOffset + innerHeight)));
              out.height = Math.min(innerHeight, out.height);
              out.height -= 2;
              out.width = Math.min(out.width, bounds.width - (pageXOffset - bounds.left));
              out.width = Math.min(out.width, bounds.width - ((bounds.left + bounds.width) - (pageXOffset + innerWidth)));
              out.width = Math.min(innerWidth, out.width);
              out.width -= 2;
              if (out.top < pageYOffset) {
                out.top = pageYOffset;
              }
              if (out.left < pageXOffset) {
                out.left = pageXOffset;
              }
              return out;
            }
            break;
          case 'scroll-handle':
            target = this.target;
            if (target === document.body) {
              target = document.documentElement;
              bounds = {
                left: pageXOffset,
                top: pageYOffset,
                height: innerHeight,
                width: innerWidth
              };
            } else {
              bounds = getBounds(target);
            }
            style = getComputedStyle(target);
            hasBottomScroll = target.scrollWidth > target.clientWidth || 'scroll' === [style.overflow, style.overflowX] || this.target !== document.body;
            scrollBottom = 0;
            if (hasBottomScroll) {
              scrollBottom = 15;
            }
            height = bounds.height - parseFloat(style.borderTopWidth) - parseFloat(style.borderBottomWidth) - scrollBottom;
            out = {
              width: 15,
              height: height * 0.975 * (height / target.scrollHeight),
              left: bounds.left + bounds.width - parseFloat(style.borderLeftWidth) - 15
            };
            fitAdj = 0;
            if (height < 408 && this.target === document.body) {
              fitAdj = -0.00011 * Math.pow(height, 2) - 0.00727 * height + 22.58;
            }
            if (this.target !== document.body) {
              out.height = Math.max(out.height, 24);
            }
            scrollPercentage = this.target.scrollTop / (target.scrollHeight - height);
            out.top = scrollPercentage * (height - out.height - fitAdj) + bounds.top + parseFloat(style.borderTopWidth);
            if (this.target === document.body) {
              out.height = Math.max(out.height, 24);
            }
            return out;
        }
      } else {
        return getBounds(this.target);
      }
    };

    _Tether.prototype.clearCache = function() {
      return this._cache = {};
    };

    _Tether.prototype.cache = function(k, getter) {
      if (this._cache == null) {
        this._cache = {};
      }
      if (this._cache[k] == null) {
        this._cache[k] = getter.call(this);
      }
      return this._cache[k];
    };

    _Tether.prototype.enable = function(position) {
      if (position == null) {
        position = true;
      }
      addClass(this.target, this.getClass('enabled'));
      addClass(this.element, this.getClass('enabled'));
      this.enabled = true;
      if (this.scrollParent !== document) {
        this.scrollParent.addEventListener('scroll', this.position);
      }
      if (position) {
        return this.position();
      }
    };

    _Tether.prototype.disable = function() {
      removeClass(this.target, this.getClass('enabled'));
      removeClass(this.element, this.getClass('enabled'));
      this.enabled = false;
      if (this.scrollParent != null) {
        return this.scrollParent.removeEventListener('scroll', this.position);
      }
    };

    _Tether.prototype.destroy = function() {
      var i, tether, _i, _len, _results;
      this.disable();
      _results = [];
      for (i = _i = 0, _len = tethers.length; _i < _len; i = ++_i) {
        tether = tethers[i];
        if (tether === this) {
          tethers.splice(i, 1);
          break;
        } else {
          _results.push(void 0);
        }
      }
      return _results;
    };

    _Tether.prototype.updateAttachClasses = function(elementAttach, targetAttach) {
      var add, all, side, sides, _i, _j, _len, _len1, _ref1,
        _this = this;
      if (elementAttach == null) {
        elementAttach = this.attachment;
      }
      if (targetAttach == null) {
        targetAttach = this.targetAttachment;
      }
      sides = ['left', 'top', 'bottom', 'right', 'middle', 'center'];
      if ((_ref1 = this._addAttachClasses) != null ? _ref1.length : void 0) {
        this._addAttachClasses.splice(0, this._addAttachClasses.length);
      }
      add = this._addAttachClasses != null ? this._addAttachClasses : this._addAttachClasses = [];
      if (elementAttach.top) {
        add.push("" + (this.getClass('element-attached')) + "-" + elementAttach.top);
      }
      if (elementAttach.left) {
        add.push("" + (this.getClass('element-attached')) + "-" + elementAttach.left);
      }
      if (targetAttach.top) {
        add.push("" + (this.getClass('target-attached')) + "-" + targetAttach.top);
      }
      if (targetAttach.left) {
        add.push("" + (this.getClass('target-attached')) + "-" + targetAttach.left);
      }
      all = [];
      for (_i = 0, _len = sides.length; _i < _len; _i++) {
        side = sides[_i];
        all.push("" + (this.getClass('element-attached')) + "-" + side);
      }
      for (_j = 0, _len1 = sides.length; _j < _len1; _j++) {
        side = sides[_j];
        all.push("" + (this.getClass('target-attached')) + "-" + side);
      }
      return defer(function() {
        if (_this._addAttachClasses == null) {
          return;
        }
        updateClasses(_this.element, _this._addAttachClasses, all);
        updateClasses(_this.target, _this._addAttachClasses, all);
        return _this._addAttachClasses = void 0;
      });
    };

    _Tether.prototype.position = function(flushChanges) {
      var elementPos, elementStyle, height, left, manualOffset, manualTargetOffset, module, next, offset, offsetBorder, offsetParent, offsetParentSize, offsetParentStyle, offsetPosition, ret, scrollLeft, scrollTop, scrollbarSize, side, targetAttachment, targetOffset, targetPos, targetSize, top, width, _i, _j, _len, _len1, _ref1, _ref2, _ref3, _ref4, _ref5, _ref6,
        _this = this;
      if (flushChanges == null) {
        flushChanges = true;
      }
      if (!this.enabled) {
        return;
      }
      this.clearCache();
      targetAttachment = autoToFixedAttachment(this.targetAttachment, this.attachment);
      this.updateAttachClasses(this.attachment, targetAttachment);
      elementPos = this.cache('element-bounds', function() {
        return getBounds(_this.element);
      });
      width = elementPos.width, height = elementPos.height;
      if (width === 0 && height === 0 && (this.lastSize != null)) {
        _ref1 = this.lastSize, width = _ref1.width, height = _ref1.height;
      } else {
        this.lastSize = {
          width: width,
          height: height
        };
      }
      targetSize = targetPos = this.cache('target-bounds', function() {
        return _this.getTargetBounds();
      });
      offset = offsetToPx(attachmentToOffset(this.attachment), {
        width: width,
        height: height
      });
      targetOffset = offsetToPx(attachmentToOffset(targetAttachment), targetSize);
      manualOffset = offsetToPx(this.offset, {
        width: width,
        height: height
      });
      manualTargetOffset = offsetToPx(this.targetOffset, targetSize);
      offset = addOffset(offset, manualOffset);
      targetOffset = addOffset(targetOffset, manualTargetOffset);
      left = targetPos.left + targetOffset.left - offset.left;
      top = targetPos.top + targetOffset.top - offset.top;
      _ref2 = Tether.modules;
      for (_i = 0, _len = _ref2.length; _i < _len; _i++) {
        module = _ref2[_i];
        ret = module.position.call(this, {
          left: left,
          top: top,
          targetAttachment: targetAttachment,
          targetPos: targetPos,
          attachment: this.attachment,
          elementPos: elementPos,
          offset: offset,
          targetOffset: targetOffset,
          manualOffset: manualOffset,
          manualTargetOffset: manualTargetOffset,
          scrollbarSize: scrollbarSize
        });
        if ((ret == null) || typeof ret !== 'object') {
          continue;
        } else if (ret === false) {
          return false;
        } else {
          top = ret.top, left = ret.left;
        }
      }
      next = {
        page: {
          top: top,
          left: left
        },
        viewport: {
          top: top - pageYOffset,
          bottom: pageYOffset - top - height + innerHeight,
          left: left - pageXOffset,
          right: pageXOffset - left - width + innerWidth
        }
      };
      if (document.body.scrollWidth > window.innerWidth) {
        scrollbarSize = this.cache('scrollbar-size', getScrollBarSize);
        next.viewport.bottom -= scrollbarSize.height;
      }
      if (document.body.scrollHeight > window.innerHeight) {
        scrollbarSize = this.cache('scrollbar-size', getScrollBarSize);
        next.viewport.right -= scrollbarSize.width;
      }
      if (((_ref3 = document.body.style.position) !== '' && _ref3 !== 'static') || ((_ref4 = document.body.parentElement.style.position) !== '' && _ref4 !== 'static')) {
        next.page.bottom = document.body.scrollHeight - top - height;
        next.page.right = document.body.scrollWidth - left - width;
      }
      if (((_ref5 = this.options.optimizations) != null ? _ref5.moveElement : void 0) !== false && (this.targetModifier == null)) {
        offsetParent = this.cache('target-offsetparent', function() {
          return getOffsetParent(_this.target);
        });
        offsetPosition = this.cache('target-offsetparent-bounds', function() {
          return getBounds(offsetParent);
        });
        offsetParentStyle = getComputedStyle(offsetParent);
        elementStyle = getComputedStyle(this.element);
        offsetParentSize = offsetPosition;
        offsetBorder = {};
        _ref6 = ['Top', 'Left', 'Bottom', 'Right'];
        for (_j = 0, _len1 = _ref6.length; _j < _len1; _j++) {
          side = _ref6[_j];
          offsetBorder[side.toLowerCase()] = parseFloat(offsetParentStyle["border" + side + "Width"]);
        }
        offsetPosition.right = document.body.scrollWidth - offsetPosition.left - offsetParentSize.width + offsetBorder.right;
        offsetPosition.bottom = document.body.scrollHeight - offsetPosition.top - offsetParentSize.height + offsetBorder.bottom;
        if (next.page.top >= (offsetPosition.top + offsetBorder.top) && next.page.bottom >= offsetPosition.bottom) {
          if (next.page.left >= (offsetPosition.left + offsetBorder.left) && next.page.right >= offsetPosition.right) {
            scrollTop = offsetParent.scrollTop;
            scrollLeft = offsetParent.scrollLeft;
            next.offset = {
              top: next.page.top - offsetPosition.top + scrollTop - offsetBorder.top,
              left: next.page.left - offsetPosition.left + scrollLeft - offsetBorder.left
            };
          }
        }
      }
      this.move(next);
      this.history.unshift(next);
      if (this.history.length > 3) {
        this.history.pop();
      }
      if (flushChanges) {
        flush();
      }
      return true;
    };

    _Tether.prototype.move = function(position) {
      var css, elVal, found, key, moved, offsetParent, point, same, transcribe, type, val, write, writeCSS, _i, _len, _ref1, _ref2,
        _this = this;
      if (this.element.parentNode == null) {
        return;
      }
      same = {};
      for (type in position) {
        same[type] = {};
        for (key in position[type]) {
          found = false;
          _ref1 = this.history;
          for (_i = 0, _len = _ref1.length; _i < _len; _i++) {
            point = _ref1[_i];
            if (!within((_ref2 = point[type]) != null ? _ref2[key] : void 0, position[type][key])) {
              found = true;
              break;
            }
          }
          if (!found) {
            same[type][key] = true;
          }
        }
      }
      css = {
        top: '',
        left: '',
        right: '',
        bottom: ''
      };
      transcribe = function(same, pos) {
        var xPos, yPos, _ref3;
        if (((_ref3 = _this.options.optimizations) != null ? _ref3.gpu : void 0) !== false) {
          if (same.top) {
            css.top = 0;
            yPos = pos.top;
          } else {
            css.bottom = 0;
            yPos = -pos.bottom;
          }
          if (same.left) {
            css.left = 0;
            xPos = pos.left;
          } else {
            css.right = 0;
            xPos = -pos.right;
          }
          css[transformKey] = "translateX(" + (Math.round(xPos)) + "px) translateY(" + (Math.round(yPos)) + "px)";
          if (transformKey !== 'msTransform') {
            return css[transformKey] += " translateZ(0)";
          }
        } else {
          if (same.top) {
            css.top = "" + pos.top + "px";
          } else {
            css.bottom = "" + pos.bottom + "px";
          }
          if (same.left) {
            return css.left = "" + pos.left + "px";
          } else {
            return css.right = "" + pos.right + "px";
          }
        }
      };
      moved = false;
      if ((same.page.top || same.page.bottom) && (same.page.left || same.page.right)) {
        css.position = 'absolute';
        transcribe(same.page, position.page);
      } else if ((same.viewport.top || same.viewport.bottom) && (same.viewport.left || same.viewport.right)) {
        css.position = 'fixed';
        transcribe(same.viewport, position.viewport);
      } else if ((same.offset != null) && same.offset.top && same.offset.left) {
        css.position = 'absolute';
        offsetParent = this.cache('target-offsetparent', function() {
          return getOffsetParent(_this.target);
        });
        if (getOffsetParent(this.element) !== offsetParent) {
          defer(function() {
            _this.element.parentNode.removeChild(_this.element);
            return offsetParent.appendChild(_this.element);
          });
        }
        transcribe(same.offset, position.offset);
        moved = true;
      } else {
        css.position = 'absolute';
        transcribe({
          top: true,
          left: true
        }, position.page);
      }
      if (!moved && this.element.parentNode.tagName !== 'BODY') {
        this.element.parentNode.removeChild(this.element);
        document.body.appendChild(this.element);
      }
      writeCSS = {};
      write = false;
      for (key in css) {
        val = css[key];
        elVal = this.element.style[key];
        if (elVal !== '' && val !== '' && (key === 'top' || key === 'left' || key === 'bottom' || key === 'right')) {
          elVal = parseFloat(elVal);
          val = parseFloat(val);
        }
        if (elVal !== val) {
          write = true;
          writeCSS[key] = css[key];
        }
      }
      if (write) {
        return defer(function() {
          return extend(_this.element.style, writeCSS);
        });
      }
    };

    return _Tether;

  })();

  Tether.position = position;

  this.Tether = extend(_Tether, Tether);

}).call(this);

(function() {
  var BOUNDS_FORMAT, MIRROR_ATTACH, defer, extend, getBoundingRect, getBounds, getOuterSize, getSize, updateClasses, _ref,
    __indexOf = [].indexOf || function(item) { for (var i = 0, l = this.length; i < l; i++) { if (i in this && this[i] === item) return i; } return -1; };

  _ref = this.Tether.Utils, getOuterSize = _ref.getOuterSize, getBounds = _ref.getBounds, getSize = _ref.getSize, extend = _ref.extend, updateClasses = _ref.updateClasses, defer = _ref.defer;

  MIRROR_ATTACH = {
    left: 'right',
    right: 'left',
    top: 'bottom',
    bottom: 'top',
    middle: 'middle'
  };

  BOUNDS_FORMAT = ['left', 'top', 'right', 'bottom'];

  getBoundingRect = function(tether, to) {
    var i, pos, side, size, style, _i, _len;
    if (to === 'scrollParent') {
      to = tether.scrollParent;
    } else if (to === 'window') {
      to = [pageXOffset, pageYOffset, innerWidth + pageXOffset, innerHeight + pageYOffset];
    }
    if (to === document) {
      to = to.documentElement;
    }
    if (to.nodeType != null) {
      pos = size = getBounds(to);
      style = getComputedStyle(to);
      to = [pos.left, pos.top, size.width + pos.left, size.height + pos.top];
      for (i = _i = 0, _len = BOUNDS_FORMAT.length; _i < _len; i = ++_i) {
        side = BOUNDS_FORMAT[i];
        side = side[0].toUpperCase() + side.substr(1);
        if (side === 'Top' || side === 'Left') {
          to[i] += parseFloat(style["border" + side + "Width"]);
        } else {
          to[i] -= parseFloat(style["border" + side + "Width"]);
        }
      }
    }
    return to;
  };

  this.Tether.modules.push({
    position: function(_arg) {
      var addClasses, allClasses, attachment, bounds, changeAttachX, changeAttachY, cls, constraint, eAttachment, height, left, oob, oobClass, p, pin, pinned, pinnedClass, removeClass, side, tAttachment, targetAttachment, targetHeight, targetSize, targetWidth, to, top, width, _i, _j, _k, _l, _len, _len1, _len2, _len3, _len4, _len5, _m, _n, _ref1, _ref2, _ref3, _ref4, _ref5, _ref6, _ref7, _ref8,
        _this = this;
      top = _arg.top, left = _arg.left, targetAttachment = _arg.targetAttachment;
      if (!this.options.constraints) {
        return true;
      }
      removeClass = function(prefix) {
        var side, _i, _len, _results;
        _this.removeClass(prefix);
        _results = [];
        for (_i = 0, _len = BOUNDS_FORMAT.length; _i < _len; _i++) {
          side = BOUNDS_FORMAT[_i];
          _results.push(_this.removeClass("" + prefix + "-" + side));
        }
        return _results;
      };
      _ref1 = this.cache('element-bounds', function() {
        return getBounds(_this.element);
      }), height = _ref1.height, width = _ref1.width;
      if (width === 0 && height === 0 && (this.lastSize != null)) {
        _ref2 = this.lastSize, width = _ref2.width, height = _ref2.height;
      }
      targetSize = this.cache('target-bounds', function() {
        return _this.getTargetBounds();
      });
      targetHeight = targetSize.height;
      targetWidth = targetSize.width;
      tAttachment = {};
      eAttachment = {};
      allClasses = [this.getClass('pinned'), this.getClass('out-of-bounds')];
      _ref3 = this.options.constraints;
      for (_i = 0, _len = _ref3.length; _i < _len; _i++) {
        constraint = _ref3[_i];
        if (constraint.outOfBoundsClass) {
          allClasses.push(constraint.outOfBoundsClass);
        }
        if (constraint.pinnedClass) {
          allClasses.push(constraint.pinnedClass);
        }
      }
      for (_j = 0, _len1 = allClasses.length; _j < _len1; _j++) {
        cls = allClasses[_j];
        _ref4 = ['left', 'top', 'right', 'bottom'];
        for (_k = 0, _len2 = _ref4.length; _k < _len2; _k++) {
          side = _ref4[_k];
          allClasses.push("" + cls + "-" + side);
        }
      }
      addClasses = [];
      tAttachment = extend({}, targetAttachment);
      eAttachment = extend({}, this.attachment);
      _ref5 = this.options.constraints;
      for (_l = 0, _len3 = _ref5.length; _l < _len3; _l++) {
        constraint = _ref5[_l];
        to = constraint.to, attachment = constraint.attachment, pin = constraint.pin;
        if (attachment == null) {
          attachment = '';
        }
        if (__indexOf.call(attachment, ' ') >= 0) {
          _ref6 = attachment.split(' '), changeAttachY = _ref6[0], changeAttachX = _ref6[1];
        } else {
          changeAttachX = changeAttachY = attachment;
        }
        bounds = getBoundingRect(this, to);
        if (changeAttachY === 'target' || changeAttachY === 'both') {
          if (top < bounds[1] && tAttachment.top === 'top') {
            top += targetHeight;
            tAttachment.top = 'bottom';
          }
          if (top + height > bounds[3] && tAttachment.top === 'bottom') {
            top -= targetHeight;
            tAttachment.top = 'top';
          }
        }
        if (changeAttachY === 'together') {
          if (top < bounds[1] && tAttachment.top === 'top') {
            if (eAttachment.top === 'bottom') {
              top += targetHeight;
              tAttachment.top = 'bottom';
              top += height;
              eAttachment.top = 'top';
            } else if (eAttachment.top === 'top') {
              top += targetHeight;
              tAttachment.top = 'bottom';
              top -= height;
              eAttachment.top = 'bottom';
            }
          }
          if (top + height > bounds[3] && tAttachment.top === 'bottom') {
            if (eAttachment.top === 'top') {
              top -= targetHeight;
              tAttachment.top = 'top';
              top -= height;
              eAttachment.top = 'bottom';
            } else if (eAttachment.top === 'bottom') {
              top -= targetHeight;
              tAttachment.top = 'top';
              top += height;
              eAttachment.top = 'top';
            }
          }
          if (tAttachment.top === 'middle') {
            if (top + height > bounds[3] && eAttachment.top === 'top') {
              top -= height;
              eAttachment.top = 'bottom';
            } else if (top < bounds[1] && eAttachment.top === 'bottom') {
              top += height;
              eAttachment.top = 'top';
            }
          }
        }
        if (changeAttachX === 'target' || changeAttachX === 'both') {
          if (left < bounds[0] && tAttachment.left === 'left') {
            left += targetWidth;
            tAttachment.left = 'right';
          }
          if (left + width > bounds[2] && tAttachment.left === 'right') {
            left -= targetWidth;
            tAttachment.left = 'left';
          }
        }
        if (changeAttachX === 'together') {
          if (left < bounds[0] && tAttachment.left === 'left') {
            if (eAttachment.left === 'right') {
              left += targetWidth;
              tAttachment.left = 'right';
              left += width;
              eAttachment.left = 'left';
            } else if (eAttachment.left === 'left') {
              left += targetWidth;
              tAttachment.left = 'right';
              left -= width;
              eAttachment.left = 'right';
            }
          } else if (left + width > bounds[2] && tAttachment.left === 'right') {
            if (eAttachment.left === 'left') {
              left -= targetWidth;
              tAttachment.left = 'left';
              left -= width;
              eAttachment.left = 'right';
            } else if (eAttachment.left === 'right') {
              left -= targetWidth;
              tAttachment.left = 'left';
              left += width;
              eAttachment.left = 'left';
            }
          } else if (tAttachment.left === 'center') {
            if (left + width > bounds[2] && eAttachment.left === 'left') {
              left -= width;
              eAttachment.left = 'right';
            } else if (left < bounds[0] && eAttachment.left === 'right') {
              left += width;
              eAttachment.left = 'left';
            }
          }
        }
        if (changeAttachY === 'element' || changeAttachY === 'both') {
          if (top < bounds[1] && eAttachment.top === 'bottom') {
            top += height;
            eAttachment.top = 'top';
          }
          if (top + height > bounds[3] && eAttachment.top === 'top') {
            top -= height;
            eAttachment.top = 'bottom';
          }
        }
        if (changeAttachX === 'element' || changeAttachX === 'both') {
          if (left < bounds[0] && eAttachment.left === 'right') {
            left += width;
            eAttachment.left = 'left';
          }
          if (left + width > bounds[2] && eAttachment.left === 'left') {
            left -= width;
            eAttachment.left = 'right';
          }
        }
        if (typeof pin === 'string') {
          pin = (function() {
            var _len4, _m, _ref7, _results;
            _ref7 = pin.split(',');
            _results = [];
            for (_m = 0, _len4 = _ref7.length; _m < _len4; _m++) {
              p = _ref7[_m];
              _results.push(p.trim());
            }
            return _results;
          })();
        } else if (pin === true) {
          pin = ['top', 'left', 'right', 'bottom'];
        }
        pin || (pin = []);
        pinned = [];
        oob = [];
        if (top < bounds[1]) {
          if (__indexOf.call(pin, 'top') >= 0) {
            top = bounds[1];
            pinned.push('top');
          } else {
            oob.push('top');
          }
        }
        if (top + height > bounds[3]) {
          if (__indexOf.call(pin, 'bottom') >= 0) {
            top = bounds[3] - height;
            pinned.push('bottom');
          } else {
            oob.push('bottom');
          }
        }
        if (left < bounds[0]) {
          if (__indexOf.call(pin, 'left') >= 0) {
            left = bounds[0];
            pinned.push('left');
          } else {
            oob.push('left');
          }
        }
        if (left + width > bounds[2]) {
          if (__indexOf.call(pin, 'right') >= 0) {
            left = bounds[2] - width;
            pinned.push('right');
          } else {
            oob.push('right');
          }
        }
        if (pinned.length) {
          pinnedClass = (_ref7 = this.options.pinnedClass) != null ? _ref7 : this.getClass('pinned');
          addClasses.push(pinnedClass);
          for (_m = 0, _len4 = pinned.length; _m < _len4; _m++) {
            side = pinned[_m];
            addClasses.push("" + pinnedClass + "-" + side);
          }
        }
        if (oob.length) {
          oobClass = (_ref8 = this.options.outOfBoundsClass) != null ? _ref8 : this.getClass('out-of-bounds');
          addClasses.push(oobClass);
          for (_n = 0, _len5 = oob.length; _n < _len5; _n++) {
            side = oob[_n];
            addClasses.push("" + oobClass + "-" + side);
          }
        }
        if (__indexOf.call(pinned, 'left') >= 0 || __indexOf.call(pinned, 'right') >= 0) {
          eAttachment.left = tAttachment.left = false;
        }
        if (__indexOf.call(pinned, 'top') >= 0 || __indexOf.call(pinned, 'bottom') >= 0) {
          eAttachment.top = tAttachment.top = false;
        }
        if (tAttachment.top !== targetAttachment.top || tAttachment.left !== targetAttachment.left || eAttachment.top !== this.attachment.top || eAttachment.left !== this.attachment.left) {
          this.updateAttachClasses(eAttachment, tAttachment);
        }
      }
      defer(function() {
        updateClasses(_this.target, addClasses, allClasses);
        return updateClasses(_this.element, addClasses, allClasses);
      });
      return {
        top: top,
        left: left
      };
    }
  });

}).call(this);

(function() {
  var defer, getBounds, updateClasses, _ref;

  _ref = this.Tether.Utils, getBounds = _ref.getBounds, updateClasses = _ref.updateClasses, defer = _ref.defer;

  this.Tether.modules.push({
    position: function(_arg) {
      var abutted, addClasses, allClasses, bottom, height, left, right, side, sides, targetPos, top, width, _i, _j, _k, _l, _len, _len1, _len2, _len3, _ref1, _ref2, _ref3, _ref4, _ref5,
        _this = this;
      top = _arg.top, left = _arg.left;
      _ref1 = this.cache('element-bounds', function() {
        return getBounds(_this.element);
      }), height = _ref1.height, width = _ref1.width;
      targetPos = this.getTargetBounds();
      bottom = top + height;
      right = left + width;
      abutted = [];
      if (top <= targetPos.bottom && bottom >= targetPos.top) {
        _ref2 = ['left', 'right'];
        for (_i = 0, _len = _ref2.length; _i < _len; _i++) {
          side = _ref2[_i];
          if ((_ref3 = targetPos[side]) === left || _ref3 === right) {
            abutted.push(side);
          }
        }
      }
      if (left <= targetPos.right && right >= targetPos.left) {
        _ref4 = ['top', 'bottom'];
        for (_j = 0, _len1 = _ref4.length; _j < _len1; _j++) {
          side = _ref4[_j];
          if ((_ref5 = targetPos[side]) === top || _ref5 === bottom) {
            abutted.push(side);
          }
        }
      }
      allClasses = [];
      addClasses = [];
      sides = ['left', 'top', 'right', 'bottom'];
      allClasses.push(this.getClass('abutted'));
      for (_k = 0, _len2 = sides.length; _k < _len2; _k++) {
        side = sides[_k];
        allClasses.push("" + (this.getClass('abutted')) + "-" + side);
      }
      if (abutted.length) {
        addClasses.push(this.getClass('abutted'));
      }
      for (_l = 0, _len3 = abutted.length; _l < _len3; _l++) {
        side = abutted[_l];
        addClasses.push("" + (this.getClass('abutted')) + "-" + side);
      }
      defer(function() {
        updateClasses(_this.target, addClasses, allClasses);
        return updateClasses(_this.element, addClasses, allClasses);
      });
      return true;
    }
  });

}).call(this);

(function() {
  this.Tether.modules.push({
    position: function(_arg) {
      var left, result, shift, shiftLeft, shiftTop, top, _ref;
      top = _arg.top, left = _arg.left;
      if (!this.options.shift) {
        return;
      }
      result = function(val) {
        if (typeof val === 'function') {
          return val.call(this, {
            top: top,
            left: left
          });
        } else {
          return val;
        }
      };
      shift = result(this.options.shift);
      if (typeof shift === 'string') {
        shift = shift.split(' ');
        shift[1] || (shift[1] = shift[0]);
        shiftTop = shift[0], shiftLeft = shift[1];
        shiftTop = parseFloat(shiftTop, 10);
        shiftLeft = parseFloat(shiftLeft, 10);
      } else {
        _ref = [shift.top, shift.left], shiftTop = _ref[0], shiftLeft = _ref[1];
      }
      top += shiftTop;
      left += shiftLeft;
      return {
        top: top,
        left: left
      };
    }
  });

}).call(this);

return this.Tether;

}));

(function() {
  var Evented, MIRROR_ATTACH, addClass, allDrops, clickEvents, createContext, extend, hasClass, removeClass, removeFromArray, sortAttach, touchDevice, _ref,
    __hasProp = {}.hasOwnProperty,
    __extends = function(child, parent) { for (var key in parent) { if (__hasProp.call(parent, key)) child[key] = parent[key]; } function ctor() { this.constructor = child; } ctor.prototype = parent.prototype; child.prototype = new ctor(); child.__super__ = parent.prototype; return child; },
    __indexOf = [].indexOf || function(item) { for (var i = 0, l = this.length; i < l; i++) { if (i in this && this[i] === item) return i; } return -1; };

  _ref = Tether.Utils, extend = _ref.extend, addClass = _ref.addClass, removeClass = _ref.removeClass, hasClass = _ref.hasClass, Evented = _ref.Evented;

  touchDevice = 'ontouchstart' in document.documentElement;

  clickEvents = ['click'];

  if (touchDevice) {
    clickEvents.push('touchstart');
  }

  sortAttach = function(str) {
    var first, second, _ref1, _ref2;
    _ref1 = str.split(' '), first = _ref1[0], second = _ref1[1];
    if (first === 'left' || first === 'right') {
      _ref2 = [second, first], first = _ref2[0], second = _ref2[1];
    }
    return [first, second].join(' ');
  };

  MIRROR_ATTACH = {
    left: 'right',
    right: 'left',
    top: 'bottom',
    bottom: 'top',
    middle: 'middle',
    center: 'center'
  };

  allDrops = {};

  removeFromArray = function(arr, item) {
    var index, _results;
    _results = [];
    while ((index = arr.indexOf(item)) !== -1) {
      _results.push(arr.splice(index, 1));
    }
    return _results;
  };

  createContext = function(options) {
    var DropInstance, defaultOptions, drop, _name;
    if (options == null) {
      options = {};
    }
    drop = function() {
      return (function(func, args, ctor) {
        ctor.prototype = func.prototype;
        var child = new ctor, result = func.apply(child, args);
        return Object(result) === result ? result : child;
      })(DropInstance, arguments, function(){});
    };
    extend(drop, {
      createContext: createContext,
      drops: [],
      defaults: {}
    });
    defaultOptions = {
      classPrefix: 'drop',
      defaults: {
        position: 'bottom left',
        openOn: 'click',
        constrainToScrollParent: true,
        constrainToWindow: true,
        classes: '',
        remove: false,
        tetherOptions: {}
      }
    };
    extend(drop, defaultOptions, options);
    extend(drop.defaults, defaultOptions.defaults, options.defaults);
    if (allDrops[_name = drop.classPrefix] == null) {
      allDrops[_name] = [];
    }
    drop.updateBodyClasses = function() {
      var anyOpen, _drop, _i, _len, _ref1;
      anyOpen = false;
      _ref1 = allDrops[drop.classPrefix];
      for (_i = 0, _len = _ref1.length; _i < _len; _i++) {
        _drop = _ref1[_i];
        if (!(_drop.isOpened())) {
          continue;
        }
        anyOpen = true;
        break;
      }
      if (anyOpen) {
        return addClass(document.body, "" + drop.classPrefix + "-open");
      } else {
        return removeClass(document.body, "" + drop.classPrefix + "-open");
      }
    };
    DropInstance = (function(_super) {
      __extends(DropInstance, _super);

      function DropInstance(options) {
        this.options = options;
        this.options = extend({}, drop.defaults, this.options);
        this.target = this.options.target;
        if (this.target == null) {
          throw new Error('Drop Error: You must provide a target.');
        }
        if (this.options.classes) {
          addClass(this.target, this.options.classes);
        }
        drop.drops.push(this);
        allDrops[drop.classPrefix].push(this);
        this._boundEvents = [];
        this.setupElements();
        this.setupEvents();
        this.setupTether();
      }

      DropInstance.prototype._on = function(element, event, handler) {
        this._boundEvents.push({
          element: element,
          event: event,
          handler: handler
        });
        return element.addEventListener(event, handler);
      };

      DropInstance.prototype.setupElements = function() {
        this.drop = document.createElement('div');
        addClass(this.drop, drop.classPrefix);
        if (this.options.classes) {
          addClass(this.drop, this.options.classes);
        }
        this.content = document.createElement('div');
        addClass(this.content, "" + drop.classPrefix + "-content");
        if (typeof this.options.content === 'object') {
          this.content.appendChild(this.options.content);
        } else {
          this.content.innerHTML = this.options.content;
        }
        return this.drop.appendChild(this.content);
      };

      DropInstance.prototype.setupTether = function() {
        var constraints, dropAttach;
        dropAttach = this.options.position.split(' ');
        dropAttach[0] = MIRROR_ATTACH[dropAttach[0]];
        dropAttach = dropAttach.join(' ');
        constraints = [];
        if (this.options.constrainToScrollParent) {
          constraints.push({
            to: 'scrollParent',
            pin: 'top, bottom',
            attachment: 'together none'
          });
        } else {
          constraints.push({
            to: 'scrollParent'
          });
        }
        if (this.options.constrainToWindow !== false) {
          constraints.push({
            to: 'window',
            attachment: 'together'
          });
        } else {
          constraints.push({
            to: 'window'
          });
        }
        options = {
          element: this.drop,
          target: this.target,
          attachment: sortAttach(dropAttach),
          targetAttachment: sortAttach(this.options.position),
          classPrefix: drop.classPrefix,
          offset: '0 0',
          targetOffset: '0 0',
          enabled: false,
          constraints: constraints
        };
        if (this.options.tetherOptions !== false) {
          return this.tether = new Tether(extend({}, options, this.options.tetherOptions));
        }
      };

      DropInstance.prototype.setupEvents = function() {
        var clickEvent, closeHandler, events, onUs, openHandler, out, outTimeout, over, _i, _len,
          _this = this;
        if (!this.options.openOn) {
          return;
        }
        if (this.options.openOn === 'always') {
          setTimeout(this.open.bind(this));
          return;
        }
        events = this.options.openOn.split(' ');
        if (__indexOf.call(events, 'click') >= 0) {
          openHandler = function(event) {
            _this.toggle();
            return event.preventDefault();
          };
          closeHandler = function(event) {
            if (!_this.isOpened()) {
              return;
            }
            if (event.target === _this.drop || _this.drop.contains(event.target)) {
              return;
            }
            if (event.target === _this.target || _this.target.contains(event.target)) {
              return;
            }
            return _this.close();
          };
          for (_i = 0, _len = clickEvents.length; _i < _len; _i++) {
            clickEvent = clickEvents[_i];
            this._on(this.target, clickEvent, openHandler);
            this._on(document, clickEvent, closeHandler);
          }
        }
        if (__indexOf.call(events, 'hover') >= 0) {
          onUs = false;
          over = function() {
            onUs = true;
            return _this.open();
          };
          outTimeout = null;
          out = function() {
            onUs = false;
            if (outTimeout != null) {
              clearTimeout(outTimeout);
            }
            return outTimeout = setTimeout(function() {
              if (!onUs) {
                _this.close();
              }
              return outTimeout = null;
            }, 50);
          };
          this._on(this.target, 'mouseover', over);
          this._on(this.drop, 'mouseover', over);
          this._on(this.target, 'mouseout', out);
          return this._on(this.drop, 'mouseout', out);
        }
      };

      DropInstance.prototype.isOpened = function() {
        return hasClass(this.drop, "" + drop.classPrefix + "-open");
      };

      DropInstance.prototype.toggle = function() {
        if (this.isOpened()) {
          return this.close();
        } else {
          return this.open();
        }
      };

      DropInstance.prototype.open = function() {
        var _ref1, _ref2,
          _this = this;
        if (this.isOpened()) {
          return;
        }
        if (!this.drop.parentNode) {
          document.body.appendChild(this.drop);
        }
        if ((_ref1 = this.tether) != null) {
          _ref1.enable();
        }
        addClass(this.drop, "" + drop.classPrefix + "-open");
        addClass(this.drop, "" + drop.classPrefix + "-open-transitionend");
        setTimeout(function() {
          return addClass(_this.drop, "" + drop.classPrefix + "-after-open");
        });
        if ((_ref2 = this.tether) != null) {
          _ref2.position();
        }
        this.trigger('open');
        return drop.updateBodyClasses();
      };

      DropInstance.prototype.close = function() {
        var handler, _ref1,
          _this = this;
        if (!this.isOpened()) {
          return;
        }
        removeClass(this.drop, "" + drop.classPrefix + "-open");
        removeClass(this.drop, "" + drop.classPrefix + "-after-open");
        this.drop.addEventListener('transitionend', handler = function() {
          if (!hasClass(_this.drop, "" + drop.classPrefix + "-open")) {
            removeClass(_this.drop, "" + drop.classPrefix + "-open-transitionend");
          }
          return _this.drop.removeEventListener('transitionend', handler);
        });
        this.trigger('close');
        if ((_ref1 = this.tether) != null) {
          _ref1.disable();
        }
        drop.updateBodyClasses();
        if (this.options.remove) {
          return this.remove();
        }
      };

      DropInstance.prototype.remove = function() {
        var _ref1;
        this.close();
        return (_ref1 = this.drop.parentNode) != null ? _ref1.removeChild(this.drop) : void 0;
      };

      DropInstance.prototype.position = function() {
        var _ref1;
        if (this.isOpened()) {
          return (_ref1 = this.tether) != null ? _ref1.position() : void 0;
        }
      };

      DropInstance.prototype.destroy = function() {
        var element, event, handler, _i, _len, _ref1, _ref2, _ref3;
        this.remove();
        if ((_ref1 = this.tether) != null) {
          _ref1.destroy();
        }
        _ref2 = this._boundEvents;
        for (_i = 0, _len = _ref2.length; _i < _len; _i++) {
          _ref3 = _ref2[_i], element = _ref3.element, event = _ref3.event, handler = _ref3.handler;
          element.removeEventListener(event, handler);
        }
        this._boundEvents = [];
        this.tether = null;
        this.drop = null;
        this.content = null;
        this.target = null;
        removeFromArray(allDrops[drop.classPrefix], this);
        return removeFromArray(drop.drops, this);
      };

      return DropInstance;

    })(Evented);
    return drop;
  };

  window.Drop = createContext();

  document.addEventListener('DOMContentLoaded', function() {
    return Drop.updateBodyClasses();
  });

}).call(this);
