diff --git a/dist/packery.pkgd.js b/dist/packery.pkgd.js
index 7f0afe1..d504ebe 100644
--- a/dist/packery.pkgd.js
+++ b/dist/packery.pkgd.js
@@ -3125,6 +3125,14 @@ proto.resize = function() {
  * @returns Boolean
  */
 proto.needsResizeLayout = function() {
+  if (document.webkitFullscreenElement) {
+    this.fullscreen = true;
+    return false;
+  } else if (this.fullscreen) {
+    this.fullscreen = false;
+    return false;
+  }
+
   var size = getSize( this.element );
   var innerSize = this._getOption('horizontal') ? 'innerHeight' : 'innerWidth';
   return size[ innerSize ] != this.size[ innerSize ];
diff --git a/dist/packery.pkgd.min.js b/dist/packery.pkgd.min.js
index 275dcb9..1d9f38a 100644
--- a/dist/packery.pkgd.min.js
+++ b/dist/packery.pkgd.min.js
@@ -9,5 +9,5 @@
  * Copyright 2016 Metafizzy
  */
 
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e=this.getItems(t);this._emitCompleteOnItems("remove",e),e&&e.length&&e.forEach(function(t){t.remove(),n.removeFrom(this.items,t)},this)},l.destroy=function(){var t=this.element.style;t.height="",t.position="",t.width="",this.items.forEach(function(t){t.destroy()}),this.unbindResize();var e=this.element.outlayerGUID;delete f[e],delete this.element.outlayerGUID,u&&u.removeData(this.element,this.constructor.namespace)},s.data=function(t){t=n.getQueryElement(t);var e=t&&t.outlayerGUID;return e&&f[e]},s.create=function(t,e){var i=r(s);return i.defaults=n.extend({},s.defaults),n.extend(i.defaults,e),i.compatOptions=n.extend({},s.compatOptions),i.namespace=t,i.data=s.data,i.Item=r(o),n.htmlInit(i,t),u&&u.bridget&&u.bridget(t,i),i};var p={ms:1,s:1e3};return s.Item=o,s}),function(t,e){"function"==typeof define&&define.amd?define("packery/js/rect",e):"object"==typeof module&&module.exports?module.exports=e():(t.Packery=t.Packery||{},t.Packery.Rect=e())}(window,function(){"use strict";function t(e){for(var i in t.defaults)this[i]=t.defaults[i];for(i in e)this[i]=e[i]}t.defaults={x:0,y:0,width:0,height:0};var e=t.prototype;return e.contains=function(t){var e=t.width||0,i=t.height||0;return this.x<=t.x&&this.y<=t.y&&this.x+this.width>=t.x+e&&this.y+this.height>=t.y+i},e.overlaps=function(t){var e=this.x+this.width,i=this.y+this.height,n=t.x+t.width,o=t.y+t.height;return this.x<n&&e>t.x&&this.y<o&&i>t.y},e.getMaximalFreeRects=function(e){if(!this.overlaps(e))return!1;var i,n=[],o=this.x+this.width,s=this.y+this.height,r=e.x+e.width,a=e.y+e.height;return this.y<e.y&&(i=new t({x:this.x,y:this.y,width:this.width,height:e.y-this.y}),n.push(i)),o>r&&(i=new t({x:r,y:this.y,width:o-r,height:this.height}),n.push(i)),s>a&&(i=new t({x:this.x,y:a,width:this.width,height:s-a}),n.push(i)),this.x<e.x&&(i=new t({x:this.x,y:this.y,width:e.x-this.x,height:this.height}),n.push(i)),n},e.canFit=function(t){return this.width>=t.width&&this.height>=t.height},t}),function(t,e){if("function"==typeof define&&define.amd)define("packery/js/packer",["./rect"],e);else if("object"==typeof module&&module.exports)module.exports=e(require("./rect"));else{var i=t.Packery=t.Packery||{};i.Packer=e(i.Rect)}}(window,function(t){"use strict";function e(t,e,i){this.width=t||0,this.height=e||0,this.sortDirection=i||"downwardLeftToRight",this.reset()}var i=e.prototype;i.reset=function(){this.spaces=[];var e=new t({x:0,y:0,width:this.width,height:this.height});this.spaces.push(e),this.sorter=n[this.sortDirection]||n.downwardLeftToRight},i.pack=function(t){for(var e=0;e<this.spaces.length;e++){var i=this.spaces[e];if(i.canFit(t)){this.placeInSpace(t,i);break}}},i.columnPack=function(t){for(var e=0;e<this.spaces.length;e++){var i=this.spaces[e],n=i.x<=t.x&&i.x+i.width>=t.x+t.width&&i.height>=t.height-.01;if(n){t.y=i.y,this.placed(t);break}}},i.rowPack=function(t){for(var e=0;e<this.spaces.length;e++){var i=this.spaces[e],n=i.y<=t.y&&i.y+i.height>=t.y+t.height&&i.width>=t.width-.01;if(n){t.x=i.x,this.placed(t);break}}},i.placeInSpace=function(t,e){t.x=e.x,t.y=e.y,this.placed(t)},i.placed=function(t){for(var e=[],i=0;i<this.spaces.length;i++){var n=this.spaces[i],o=n.getMaximalFreeRects(t);o?e.push.apply(e,o):e.push(n)}this.spaces=e,this.mergeSortSpaces()},i.mergeSortSpaces=function(){e.mergeRects(this.spaces),this.spaces.sort(this.sorter)},i.addSpace=function(t){this.spaces.push(t),this.mergeSortSpaces()},e.mergeRects=function(t){var e=0,i=t[e];t:for(;i;){for(var n=0,o=t[e+n];o;){if(o==i)n++;else{if(o.contains(i)){t.splice(e,1),i=t[e];continue t}i.contains(o)?t.splice(e+n,1):n++}o=t[e+n]}e++,i=t[e]}return t};var n={downwardLeftToRight:function(t,e){return t.y-e.y||t.x-e.x},rightwardTopToBottom:function(t,e){return t.x-e.x||t.y-e.y}};return e}),function(t,e){"function"==typeof define&&define.amd?define("packery/js/item",["outlayer/outlayer","./rect"],e):"object"==typeof module&&module.exports?module.exports=e(require("outlayer"),require("./rect")):t.Packery.Item=e(t.Outlayer,t.Packery.Rect)}(window,function(t,e){"use strict";var i=document.documentElement.style,n="string"==typeof i.transform?"transform":"WebkitTransform",o=function(){t.Item.apply(this,arguments)},s=o.prototype=Object.create(t.Item.prototype),r=s._create;s._create=function(){r.call(this),this.rect=new e};var a=s.moveTo;return s.moveTo=function(t,e){var i=Math.abs(this.position.x-t),n=Math.abs(this.position.y-e),o=this.layout.dragItemCount&&!this.isPlacing&&!this.isTransitioning&&i<1&&n<1;return o?void this.goTo(t,e):void a.apply(this,arguments)},s.enablePlacing=function(){this.removeTransitionStyles(),this.isTransitioning&&n&&(this.element.style[n]="none"),this.isTransitioning=!1,this.getSize(),this.layout._setRectSize(this.element,this.rect),this.isPlacing=!0},s.disablePlacing=function(){this.isPlacing=!1},s.removeElem=function(){this.element.parentNode.removeChild(this.element),this.layout.packer.addSpace(this.rect),this.emitEvent("remove",[this])},s.showDropPlaceholder=function(){var t=this.dropPlaceholder;t||(t=this.dropPlaceholder=document.createElement("div"),t.className="packery-drop-placeholder",t.style.position="absolute"),t.style.width=this.size.width+"px",t.style.height=this.size.height+"px",this.positionDropPlaceholder(),this.layout.element.appendChild(t)},s.positionDropPlaceholder=function(){this.dropPlaceholder.style[n]="translate("+this.rect.x+"px, "+this.rect.y+"px)"},s.hideDropPlaceholder=function(){var t=this.dropPlaceholder.parentNode;t&&t.removeChild(this.dropPlaceholder)},o}),function(t,e){"function"==typeof define&&define.amd?define(["get-size/get-size","outlayer/outlayer","packery/js/rect","packery/js/packer","packery/js/item"],e):"object"==typeof module&&module.exports?module.exports=e(require("get-size"),require("outlayer"),require("./rect"),require("./packer"),require("./item")):t.Packery=e(t.getSize,t.Outlayer,t.Packery.Rect,t.Packery.Packer,t.Packery.Item)}(window,function(t,e,i,n,o){"use strict";function s(t,e){return t.position.y-e.position.y||t.position.x-e.position.x}function r(t,e){return t.position.x-e.position.x||t.position.y-e.position.y}function a(t,e){var i=e.x-t.x,n=e.y-t.y;return Math.sqrt(i*i+n*n)}i.prototype.canFit=function(t){return this.width>=t.width-1&&this.height>=t.height-1};var h=e.create("packery");h.Item=o;var u=h.prototype;u._create=function(){e.prototype._create.call(this);var t=this.options.gutter;Array.isArray(t)?void 0!==typeof t[0]?(this.options.gutterWidth=t[0],"undefined"!=typeof t[1]?this.options.gutterHeight=t[1]:this.options.gutterHeight=this.options.gutterWidth):this.options.gutterWidth=this.options.gutterHeight=0:this.options.gutterWidth=this.options.gutterHeight=t,this.packer=new n,this.shiftPacker=new n,this.isEnabled=!0,this.dragItemCount=0;var i=this;this.handleDraggabilly={dragStart:function(){i.itemDragStart(this.element)},dragMove:function(){i.itemDragMove(this.element,this.position.x,this.position.y)},dragEnd:function(){i.itemDragEnd(this.element)}},this.handleUIDraggable={start:function(t,e){e&&i.itemDragStart(t.currentTarget)},drag:function(t,e){e&&i.itemDragMove(t.currentTarget,e.position.left,e.position.top)},stop:function(t,e){e&&i.itemDragEnd(t.currentTarget)}}},u._resetLayout=function(){this.getSize(),this._getMeasurements();var t,e,i;this._getOption("horizontal")?(t=1/0,e=this.size.innerHeight+this.gutterHeight,i="rightwardTopToBottom"):(t=this.size.innerWidth+this.gutterWidth,e=1/0,i="downwardLeftToRight"),this.packer.width=this.shiftPacker.width=t,this.packer.height=this.shiftPacker.height=e,this.packer.sortDirection=this.shiftPacker.sortDirection=i,this.packer.reset(),this.maxY=0,this.maxX=0},u._getMeasurements=function(){this._getMeasurement("columnWidth","width"),this._getMeasurement("rowHeight","height"),this._getMeasurement("gutterWidth","width"),this._getMeasurement("gutterHeight","height")},u._getItemLayoutPosition=function(t){if(this._setRectSize(t.element,t.rect),this.isShifting||this.dragItemCount>0){var e=this._getPackMethod();this.packer[e](t.rect)}else this.packer.pack(t.rect);return this._setMaxXY(t.rect),t.rect},u.shiftLayout=function(){this.isShifting=!0,this.layout(),delete this.isShifting},u._getPackMethod=function(){return this._getOption("horizontal")?"rowPack":"columnPack"},u._setMaxXY=function(t){this.maxX=Math.max(t.x+t.width,this.maxX),this.maxY=Math.max(t.y+t.height,this.maxY)},u._setRectSize=function(e,i){var n=t(e),o=n.outerWidth,s=n.outerHeight;(o||s)&&(o=this._applyGridGutter(o,this.columnWidth,!0),s=this._applyGridGutter(s,this.rowHeight,!1)),i.width=Math.min(o,this.packer.width),i.height=Math.min(s,this.packer.height)},u._applyGridGutter=function(t,e,i){var n=i?this.gutterWidth:this.gutterHeight;if(!e)return t+n;e+=n;var o=t%e,s=o&&o<1?"round":"ceil";return t=Math[s](t/e)*e},u._getContainerSize=function(){return this._getOption("horizontal")?{width:this.maxX-this.gutterWidth}:{height:this.maxY-this.gutterHeight}},u._manageStamp=function(t){var e,n=this.getItem(t);if(n&&n.isPlacing)e=n.rect;else{var o=this._getElementOffset(t);e=new i({x:this._getOption("originLeft")?o.left:o.right,y:this._getOption("originTop")?o.top:o.bottom})}this._setRectSize(t,e),this.packer.placed(e),this._setMaxXY(e)},u.sortItemsByPosition=function(){var t=this._getOption("horizontal")?r:s;this.items.sort(t)},u.fit=function(t,e,i){var n=this.getItem(t);n&&(this.stamp(n.element),n.enablePlacing(),this.updateShiftTargets(n),e=void 0===e?n.rect.x:e,i=void 0===i?n.rect.y:i,this.shift(n,e,i),this._bindFitEvents(n),n.moveTo(n.rect.x,n.rect.y),this.shiftLayout(),this.unstamp(n.element),this.sortItemsByPosition(),n.disablePlacing())},u._bindFitEvents=function(t){function e(){n++,2==n&&i.dispatchEvent("fitComplete",null,[t])}var i=this,n=0;t.once("layout",e),this.once("layoutComplete",e)},u.resize=function(){this.isResizeBound&&this.needsResizeLayout()&&(this.options.shiftPercentResize?this.resizeShiftPercentLayout():this.layout())},u.needsResizeLayout=function(){var e=t(this.element),i=this._getOption("horizontal")?"innerHeight":"innerWidth";return e[i]!=this.size[i]},u.resizeShiftPercentLayout=function(){var e=this._getItemsForLayout(this.items),i=this._getOption("horizontal"),n=i?"y":"x",o=i?"height":"width",s=i?"rowHeight":"columnWidth",r=i?"innerHeight":"innerWidth",a=i?this.gutterHeight:this.gutterWidth,h=this[s];if(h=h&&h+a){this._getMeasurements();var u=this[s]+a;e.forEach(function(t){var e=Math.round(t.rect[n]/h);t.rect[n]=e*u})}else{var c=t(this.element)[r]+a,d=this.packer[o];e.forEach(function(t){t.rect[n]=t.rect[n]/d*c})}this.shiftLayout()},u.itemDragStart=function(t){if(this.isEnabled){this.stamp(t);var e=this.getItem(t);e&&(e.enablePlacing(),e.showDropPlaceholder(),this.dragItemCount++,this.updateShiftTargets(e))}},u.updateShiftTargets=function(t){this.shiftPacker.reset(),this._getBoundingRect();var e=this._getOption("originLeft"),n=this._getOption("originTop");this.stamps.forEach(function(t){var o=this.getItem(t);if(!o||!o.isPlacing){var s=this._getElementOffset(t),r=new i({x:e?s.left:s.right,y:n?s.top:s.bottom});this._setRectSize(t,r),this.shiftPacker.placed(r)}},this);var o=this._getOption("horizontal"),s=o?"rowHeight":"columnWidth",r=o?"height":"width",a=o?this.gutterHeight:this.gutterWidth;this.shiftTargetKeys=[],this.shiftTargets=[];var h,u=this[s];if(u=u&&u+a){var c=Math.ceil(t.rect[r]/u),d=Math.floor((this.shiftPacker[r]+a)/u);h=(d-c)*u;for(var f=0;f<d;f++){var l=o?0:f*u,p=o?f*u:0;this._addShiftTarget(l,p,h)}}else h=this.shiftPacker[r]+a-t.rect[r],this._addShiftTarget(0,0,h);var g=this._getItemsForLayout(this.items),m=this._getPackMethod();g.forEach(function(t){var e=t.rect;this._setRectSize(t.element,e),this.shiftPacker[m](e),this._addShiftTarget(e.x,e.y,h);var i=o?e.x+e.width:e.x,n=o?e.y:e.y+e.height;if(this._addShiftTarget(i,n,h),u)for(var s=Math.round(e[r]/u),a=1;a<s;a++){
-var c=o?i:e.x+u*a,d=o?e.y+u*a:n;this._addShiftTarget(c,d,h)}},this)},u._addShiftTarget=function(t,e,i){var n=this._getOption("horizontal")?e:t;if(!(0!==n&&n>i)){var o=t+","+e,s=this.shiftTargetKeys.indexOf(o)!=-1;s||(this.shiftTargetKeys.push(o),this.shiftTargets.push({x:t,y:e}))}},u.shift=function(t,e,i){var n,o=1/0,s={x:e,y:i};this.shiftTargets.forEach(function(t){var e=a(t,s);e<o&&(n=t,o=e)}),t.rect.x=n.x,t.rect.y=n.y};var c=120;u.itemDragMove=function(t,e,i){function n(){s.shift(o,e,i),o.positionDropPlaceholder(),s.layout()}var o=this.isEnabled&&this.getItem(t);if(o){e-=this.size.paddingLeft,i-=this.size.paddingTop;var s=this,r=new Date;this._itemDragTime&&r-this._itemDragTime<c?(clearTimeout(this.dragTimeout),this.dragTimeout=setTimeout(n,c)):(n(),this._itemDragTime=r)}},u.itemDragEnd=function(t){function e(){n++,2==n&&(i.element.classList.remove("is-positioning-post-drag"),i.hideDropPlaceholder(),o.dispatchEvent("dragItemPositioned",null,[i]))}var i=this.isEnabled&&this.getItem(t);if(i){clearTimeout(this.dragTimeout),i.element.classList.add("is-positioning-post-drag");var n=0,o=this;i.once("layout",e),this.once("layoutComplete",e),i.moveTo(i.rect.x,i.rect.y),this.layout(),this.dragItemCount=Math.max(0,this.dragItemCount-1),this.sortItemsByPosition(),i.disablePlacing(),this.unstamp(i.element)}},u.bindDraggabillyEvents=function(t){this._bindDraggabillyEvents(t,"on")},u.unbindDraggabillyEvents=function(t){this._bindDraggabillyEvents(t,"off")},u._bindDraggabillyEvents=function(t,e){var i=this.handleDraggabilly;t[e]("dragStart",i.dragStart),t[e]("dragMove",i.dragMove),t[e]("dragEnd",i.dragEnd)},u.bindUIDraggableEvents=function(t){this._bindUIDraggableEvents(t,"on")},u.unbindUIDraggableEvents=function(t){this._bindUIDraggableEvents(t,"off")},u._bindUIDraggableEvents=function(t,e){var i=this.handleUIDraggable;t[e]("dragstart",i.start)[e]("drag",i.drag)[e]("dragstop",i.stop)};var d=u.destroy;return u.destroy=function(){d.apply(this,arguments),this.isEnabled=!1},h.Rect=i,h.Packer=n,h});
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define&&define.amd)define("packery/js/packer",["./rect"],e);else if("object"==typeof module&&module.exports)module.exports=e(require("./rect"));else{var i=t.Packery=t.Packery||{};i.Packer=e(i.Rect)}}(window,function(t){"use strict";function e(t,e,i){this.width=t||0,this.height=e||0,this.sortDirection=i||"downwardLeftToRight",this.reset()}var i=e.prototype;i.reset=function(){this.spaces=[];var e=new t({x:0,y:0,width:this.width,height:this.height});this.spaces.push(e),this.sorter=n[this.sortDirection]||n.downwardLeftToRight},i.pack=function(t){for(var e=0;e<this.spaces.length;e++){var i=this.spaces[e];if(i.canFit(t)){this.placeInSpace(t,i);break}}},i.columnPack=function(t){for(var e=0;e<this.spaces.length;e++){var i=this.spaces[e],n=i.x<=t.x&&i.x+i.width>=t.x+t.width&&i.height>=t.height-.01;if(n){t.y=i.y,this.placed(t);break}}},i.rowPack=function(t){for(var e=0;e<this.spaces.length;e++){var i=this.spaces[e],n=i.y<=t.y&&i.y+i.height>=t.y+t.height&&i.width>=t.width-.01;if(n){t.x=i.x,this.placed(t);break}}},i.placeInSpace=function(t,e){t.x=e.x,t.y=e.y,this.placed(t)},i.placed=function(t){for(var e=[],i=0;i<this.spaces.length;i++){var n=this.spaces[i],o=n.getMaximalFreeRects(t);o?e.push.apply(e,o):e.push(n)}this.spaces=e,this.mergeSortSpaces()},i.mergeSortSpaces=function(){e.mergeRects(this.spaces),this.spaces.sort(this.sorter)},i.addSpace=function(t){this.spaces.push(t),this.mergeSortSpaces()},e.mergeRects=function(t){var e=0,i=t[e];t:for(;i;){for(var n=0,o=t[e+n];o;){if(o==i)n++;else{if(o.contains(i)){t.splice(e,1),i=t[e];continue t}i.contains(o)?t.splice(e+n,1):n++}o=t[e+n]}e++,i=t[e]}return t};var n={downwardLeftToRight:function(t,e){return t.y-e.y||t.x-e.x},rightwardTopToBottom:function(t,e){return t.x-e.x||t.y-e.y}};return e}),function(t,e){"function"==typeof define&&define.amd?define("packery/js/item",["outlayer/outlayer","./rect"],e):"object"==typeof module&&module.exports?module.exports=e(require("outlayer"),require("./rect")):t.Packery.Item=e(t.Outlayer,t.Packery.Rect)}(window,function(t,e){"use strict";var i=document.documentElement.style,n="string"==typeof i.transform?"transform":"WebkitTransform",o=function(){t.Item.apply(this,arguments)},s=o.prototype=Object.create(t.Item.prototype),r=s._create;s._create=function(){r.call(this),this.rect=new e};var a=s.moveTo;return s.moveTo=function(t,e){var i=Math.abs(this.position.x-t),n=Math.abs(this.position.y-e),o=this.layout.dragItemCount&&!this.isPlacing&&!this.isTransitioning&&i<1&&n<1;return o?void this.goTo(t,e):void a.apply(this,arguments)},s.enablePlacing=function(){this.removeTransitionStyles(),this.isTransitioning&&n&&(this.element.style[n]="none"),this.isTransitioning=!1,this.getSize(),this.layout._setRectSize(this.element,this.rect),this.isPlacing=!0},s.disablePlacing=function(){this.isPlacing=!1},s.removeElem=function(){this.element.parentNode.removeChild(this.element),this.layout.packer.addSpace(this.rect),this.emitEvent("remove",[this])},s.showDropPlaceholder=function(){var t=this.dropPlaceholder;t||(t=this.dropPlaceholder=document.createElement("div"),t.className="packery-drop-placeholder",t.style.position="absolute"),t.style.width=this.size.width+"px",t.style.height=this.size.height+"px",this.positionDropPlaceholder(),this.layout.element.appendChild(t)},s.positionDropPlaceholder=function(){this.dropPlaceholder.style[n]="translate("+this.rect.x+"px, "+this.rect.y+"px)"},s.hideDropPlaceholder=function(){var t=this.dropPlaceholder.parentNode;t&&t.removeChild(this.dropPlaceholder)},o}),function(t,e){"function"==typeof define&&define.amd?define(["get-size/get-size","outlayer/outlayer","packery/js/rect","packery/js/packer","packery/js/item"],e):"object"==typeof module&&module.exports?module.exports=e(require("get-size"),require("outlayer"),require("./rect"),require("./packer"),require("./item")):t.Packery=e(t.getSize,t.Outlayer,t.Packery.Rect,t.Packery.Packer,t.Packery.Item)}(window,function(t,e,i,n,o){"use strict";function s(t,e){return t.position.y-e.position.y||t.position.x-e.position.x}function r(t,e){return t.position.x-e.position.x||t.position.y-e.position.y}function a(t,e){var i=e.x-t.x,n=e.y-t.y;return Math.sqrt(i*i+n*n)}i.prototype.canFit=function(t){return this.width>=t.width-1&&this.height>=t.height-1};var h=e.create("packery");h.Item=o;var u=h.prototype;u._create=function(){e.prototype._create.call(this);var t=this.options.gutter;Array.isArray(t)?void 0!==typeof t[0]?(this.options.gutterWidth=t[0],"undefined"!=typeof t[1]?this.options.gutterHeight=t[1]:this.options.gutterHeight=this.options.gutterWidth):this.options.gutterWidth=this.options.gutterHeight=0:this.options.gutterWidth=this.options.gutterHeight=t,this.packer=new n,this.shiftPacker=new n,this.isEnabled=!0,this.dragItemCount=0;var i=this;this.handleDraggabilly={dragStart:function(){i.itemDragStart(this.element)},dragMove:function(){i.itemDragMove(this.element,this.position.x,this.position.y)},dragEnd:function(){i.itemDragEnd(this.element)}},this.handleUIDraggable={start:function(t,e){e&&i.itemDragStart(t.currentTarget)},drag:function(t,e){e&&i.itemDragMove(t.currentTarget,e.position.left,e.position.top)},stop:function(t,e){e&&i.itemDragEnd(t.currentTarget)}}},u._resetLayout=function(){this.getSize(),this._getMeasurements();var t,e,i;this._getOption("horizontal")?(t=1/0,e=this.size.innerHeight+this.gutterHeight,i="rightwardTopToBottom"):(t=this.size.innerWidth+this.gutterWidth,e=1/0,i="downwardLeftToRight"),this.packer.width=this.shiftPacker.width=t,this.packer.height=this.shiftPacker.height=e,this.packer.sortDirection=this.shiftPacker.sortDirection=i,this.packer.reset(),this.maxY=0,this.maxX=0},u._getMeasurements=function(){this._getMeasurement("columnWidth","width"),this._getMeasurement("rowHeight","height"),this._getMeasurement("gutterWidth","width"),this._getMeasurement("gutterHeight","height")},u._getItemLayoutPosition=function(t){if(this._setRectSize(t.element,t.rect),this.isShifting||this.dragItemCount>0){var e=this._getPackMethod();this.packer[e](t.rect)}else this.packer.pack(t.rect);return this._setMaxXY(t.rect),t.rect},u.shiftLayout=function(){this.isShifting=!0,this.layout(),delete this.isShifting},u._getPackMethod=function(){return this._getOption("horizontal")?"rowPack":"columnPack"},u._setMaxXY=function(t){this.maxX=Math.max(t.x+t.width,this.maxX),this.maxY=Math.max(t.y+t.height,this.maxY)},u._setRectSize=function(e,i){var n=t(e),o=n.outerWidth,s=n.outerHeight;(o||s)&&(o=this._applyGridGutter(o,this.columnWidth,!0),s=this._applyGridGutter(s,this.rowHeight,!1)),i.width=Math.min(o,this.packer.width),i.height=Math.min(s,this.packer.height)},u._applyGridGutter=function(t,e,i){var n=i?this.gutterWidth:this.gutterHeight;if(!e)return t+n;e+=n;var o=t%e,s=o&&o<1?"round":"ceil";return t=Math[s](t/e)*e},u._getContainerSize=function(){return this._getOption("horizontal")?{width:this.maxX-this.gutterWidth}:{height:this.maxY-this.gutterHeight}},u._manageStamp=function(t){var e,n=this.getItem(t);if(n&&n.isPlacing)e=n.rect;else{var o=this._getElementOffset(t);e=new i({x:this._getOption("originLeft")?o.left:o.right,y:this._getOption("originTop")?o.top:o.bottom})}this._setRectSize(t,e),this.packer.placed(e),this._setMaxXY(e)},u.sortItemsByPosition=function(){var t=this._getOption("horizontal")?r:s;this.items.sort(t)},u.fit=function(t,e,i){var n=this.getItem(t);n&&(this.stamp(n.element),n.enablePlacing(),this.updateShiftTargets(n),e=void 0===e?n.rect.x:e,i=void 0===i?n.rect.y:i,this.shift(n,e,i),this._bindFitEvents(n),n.moveTo(n.rect.x,n.rect.y),this.shiftLayout(),this.unstamp(n.element),this.sortItemsByPosition(),n.disablePlacing())},u._bindFitEvents=function(t){function e(){n++,2==n&&i.dispatchEvent("fitComplete",null,[t])}var i=this,n=0;t.once("layout",e),this.once("layoutComplete",e)},u.resize=function(){this.isResizeBound&&this.needsResizeLayout()&&(this.options.shiftPercentResize?this.resizeShiftPercentLayout():this.layout())},u.needsResizeLayout=function(){if(document.webkitFullscreenElement)return this.fullscreen=!0,!1;if(this.fullscreen)return this.fullscreen=!1,!1;var e=t(this.element),i=this._getOption("horizontal")?"innerHeight":"innerWidth";return e[i]!=this.size[i]},u.resizeShiftPercentLayout=function(){var e=this._getItemsForLayout(this.items),i=this._getOption("horizontal"),n=i?"y":"x",o=i?"height":"width",s=i?"rowHeight":"columnWidth",r=i?"innerHeight":"innerWidth",a=i?this.gutterHeight:this.gutterWidth,h=this[s];if(h=h&&h+a){this._getMeasurements();var u=this[s]+a;e.forEach(function(t){var e=Math.round(t.rect[n]/h);t.rect[n]=e*u})}else{var c=t(this.element)[r]+a,d=this.packer[o];e.forEach(function(t){t.rect[n]=t.rect[n]/d*c})}this.shiftLayout()},u.itemDragStart=function(t){if(this.isEnabled){this.stamp(t);var e=this.getItem(t);e&&(e.enablePlacing(),e.showDropPlaceholder(),this.dragItemCount++,this.updateShiftTargets(e))}},u.updateShiftTargets=function(t){this.shiftPacker.reset(),this._getBoundingRect();var e=this._getOption("originLeft"),n=this._getOption("originTop");this.stamps.forEach(function(t){var o=this.getItem(t);if(!o||!o.isPlacing){var s=this._getElementOffset(t),r=new i({x:e?s.left:s.right,y:n?s.top:s.bottom});this._setRectSize(t,r),this.shiftPacker.placed(r)}},this);var o=this._getOption("horizontal"),s=o?"rowHeight":"columnWidth",r=o?"height":"width",a=o?this.gutterHeight:this.gutterWidth;this.shiftTargetKeys=[],this.shiftTargets=[];var h,u=this[s];if(u=u&&u+a){var c=Math.ceil(t.rect[r]/u),d=Math.floor((this.shiftPacker[r]+a)/u);h=(d-c)*u;for(var f=0;f<d;f++){var l=o?0:f*u,p=o?f*u:0;this._addShiftTarget(l,p,h)}}else h=this.shiftPacker[r]+a-t.rect[r],this._addShiftTarget(0,0,h);var g=this._getItemsForLayout(this.items),m=this._getPackMethod();g.forEach(function(t){var e=t.rect;this._setRectSize(t.element,e),this.shiftPacker[m](e),this._addShiftTarget(e.x,e.y,h);
+var i=o?e.x+e.width:e.x,n=o?e.y:e.y+e.height;if(this._addShiftTarget(i,n,h),u)for(var s=Math.round(e[r]/u),a=1;a<s;a++){var c=o?i:e.x+u*a,d=o?e.y+u*a:n;this._addShiftTarget(c,d,h)}},this)},u._addShiftTarget=function(t,e,i){var n=this._getOption("horizontal")?e:t;if(!(0!==n&&n>i)){var o=t+","+e,s=this.shiftTargetKeys.indexOf(o)!=-1;s||(this.shiftTargetKeys.push(o),this.shiftTargets.push({x:t,y:e}))}},u.shift=function(t,e,i){var n,o=1/0,s={x:e,y:i};this.shiftTargets.forEach(function(t){var e=a(t,s);e<o&&(n=t,o=e)}),t.rect.x=n.x,t.rect.y=n.y};var c=120;u.itemDragMove=function(t,e,i){function n(){s.shift(o,e,i),o.positionDropPlaceholder(),s.layout()}var o=this.isEnabled&&this.getItem(t);if(o){e-=this.size.paddingLeft,i-=this.size.paddingTop;var s=this,r=new Date;this._itemDragTime&&r-this._itemDragTime<c?(clearTimeout(this.dragTimeout),this.dragTimeout=setTimeout(n,c)):(n(),this._itemDragTime=r)}},u.itemDragEnd=function(t){function e(){n++,2==n&&(i.element.classList.remove("is-positioning-post-drag"),i.hideDropPlaceholder(),o.dispatchEvent("dragItemPositioned",null,[i]))}var i=this.isEnabled&&this.getItem(t);if(i){clearTimeout(this.dragTimeout),i.element.classList.add("is-positioning-post-drag");var n=0,o=this;i.once("layout",e),this.once("layoutComplete",e),i.moveTo(i.rect.x,i.rect.y),this.layout(),this.dragItemCount=Math.max(0,this.dragItemCount-1),this.sortItemsByPosition(),i.disablePlacing(),this.unstamp(i.element)}},u.bindDraggabillyEvents=function(t){this._bindDraggabillyEvents(t,"on")},u.unbindDraggabillyEvents=function(t){this._bindDraggabillyEvents(t,"off")},u._bindDraggabillyEvents=function(t,e){var i=this.handleDraggabilly;t[e]("dragStart",i.dragStart),t[e]("dragMove",i.dragMove),t[e]("dragEnd",i.dragEnd)},u.bindUIDraggableEvents=function(t){this._bindUIDraggableEvents(t,"on")},u.unbindUIDraggableEvents=function(t){this._bindUIDraggableEvents(t,"off")},u._bindUIDraggableEvents=function(t,e){var i=this.handleUIDraggable;t[e]("dragstart",i.start)[e]("drag",i.drag)[e]("dragstop",i.stop)};var d=u.destroy;return u.destroy=function(){d.apply(this,arguments),this.isEnabled=!1},h.Rect=i,h.Packer=n,h});
\ No newline at end of file
diff --git a/js/packery.js b/js/packery.js
index f663eaa..bb29c8c 100644
--- a/js/packery.js
+++ b/js/packery.js
@@ -380,6 +380,14 @@ proto.resize = function() {
  * @returns Boolean
  */
 proto.needsResizeLayout = function() {
+  if (this.isFullscreen()) {
+    this.fullscreen = true;
+    return false;
+  } else if (this.fullscreen) {
+    this.fullscreen = false;
+    return false;
+  }
+
   var size = getSize( this.element );
   var innerSize = this._getOption('horizontal') ? 'innerHeight' : 'innerWidth';
   return size[ innerSize ] != this.size[ innerSize ];
@@ -417,6 +425,13 @@ proto.resizeShiftPercentLayout = function() {
   this.shiftLayout();
 };
 
+proto.isFullscreen = function() {
+  return !!document.fullscreenElement ||
+    !!document.webkitFullscreenElement ||
+    !!document.mozFullScreenElement ||
+    !!document.msFullscreenElement;
+}
+
 // -------------------------- drag -------------------------- //
 
 /**