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HTML

              
                <h1>FlagstoneJS <span class="yellow">4.0.0</span><span class="slogan">Dynamic &#38; responsive tiling</span></h1>
<p class="quick-info"><span class="yellow">12.5 KB</span> | No dependencies | Loaded with options</p>

<div class="adjust">
  <table>
    <thead>
      <tr>
        <th>Property</th>
        <th>Value</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td>margin:</td>
        <td><input type="number" min="0" max="1000" disabled id="adjust-margin"></td>
      </tr>
      <tr>
        <td>bedPadding:</td>
        <td><input type="number" min="0" max="1000" value="10" id="adjust-bed-padding"></td>
      </tr>
      <tr>
        <td>stonesMargin:</td>
        <td><input type="number" min="0" max="1000" value="10" id="adjust-stones-margin"></td>
      </tr>
      <tr>
        <td>minWidth:</td>
        <td><input type="number" min="0" max="1000" value="280" id="adjust-min-width"></td>
      </tr>
      <tr>
        <td>maxColumns:</td><td><input type="number" min="0" max="1000" value="5" id="adjust-max-columns"></td>
      </tr>
      <tr>
        <td>dragAndDrop:</td>
        <td><input type="checkbox" checked id="adjust-drag-and-drop"></td>
      </tr>
      <tr>
        <td>dropCallback:</td>
        <td><textarea id="adjust-drop-callback">function(dragElem, targetElem) {
    return true;
  }</textarea></td>
      </tr>
      <tr>
        <td>callback:</td>
        <td><textarea id="adjust-callback">function(elem, index) {
    if (index === 3) {
      elem.classList.add('highlight');
    } else {
      elem.classList.remove('highlight');
    }
  }</textarea></td>
      </tr>
    </tbody>
    <tfoot>
      <tr>
        <td><button class="apply-adjustments">Apply</button></td>
        <td></td>
      </tr>
    </tfoot>
  </table>
  <div class="toggle-widget">
    <p>Toggle Adjust Widget</p>
    <button>&#x21D5;</button>
  </div>
</div>

<button class="add-card">Inject a card</button>

<article style="visibility:hidden;">
  <section class="flagstone-drag-handle">
    <h2>1</h2>
    <button class="flagstone-remove">&#215;</button>
    <p class="p-animate">Lorem ipsum dolor sit amet, consectetur adipisicing elit. Accusamus ducimus unde amet quam omnis aliquid aliquam culpa, explicabo ut officia illum doloremque debitis, fugiat eos. Hic cupiditate sapiente placeat temporibus.</p>
    <button class="toggle-more show-more flagstone-resize-height">Show More</button>
    <button class="toggle-more show-less flagstone-resize-height">Show Less</button>
  </section>
  <section class="flagstone-drag-handle">
    <h2>2</h2>
    <button class="flagstone-remove">&#215;</button>
    <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Accusamus ducimus unde amet quam omnis aliquid aliquam culpa, explicabo ut officia illum doloremque debitis, fugiat eos. Hic cupiditate sapiente placeat temporibus.</p>
    <img src="http://placebear.com/160/160" alt="" style="float:left;width:80px;margin:10px 10px 10px 0;"/>
    <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Accusamus ducimus unde amet quam omnis aliquid aliquam culpa, explicabo ut officia illum doloremque debitis, fugiat eos. Hic cupiditate sapiente placeat temporibus.</p>
    <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Accusamus ducimus unde amet quam omnis aliquid aliquam culpa, explicabo ut officia illum doloremque debitis, fugiat eos. Hic cupiditate sapiente placeat temporibus.</p>
    <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Accusamus ducimus unde amet quam omnis aliquid aliquam culpa, explicabo ut officia illum doloremque debitis, fugiat eos. Hic cupiditate sapiente placeat temporibus.</p>
  </section>
  <section class="flagstone-drag-handle">
    <h2>3</h2>
    <button class="flagstone-remove">&#215;</button>
    <img src="http://placebear.com/260/80" alt="" id="change-my-source"/>
    <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit.</p>
  </section>
  <section class="flagstone-drag-handle">
    <h2>4</h2>
    <button class="flagstone-remove">&#215;</button>
    <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Accusamus ducimus unde amet quam omnis aliquid aliquam culpa, explicabo ut officia illum doloremque debitis, fugiat eos. Lorem ipsum dolor sit amet hic cupiditate sapiente placeat temporibus.</p>
  </section>
  <section class="flagstone-drag-handle">
    <h2>5</h2>
    <button class="flagstone-remove">&#215;</button>
    <p>Lorem ipsum dolor sit amet. Hic cupiditate sapiente placeat temporibus, placeat temporibus, fugiat eos.</p>
  </section>
  <section class="flagstone-drag-handle">
    <h2>6</h2>
    <button class="flagstone-remove">&#215;</button>
    <p>Lorem ipsum dolor sit amet. Accusamus ducimus unde amet quam omnis aliquid aliquam culpa, explicabo ut officia illum doloremque debitis, fugiat eos. Hic cupiditate sapiente placeat temporibus.</p>
  </section>
  <section class="flagstone-drag-handle">
    <h2>7</h2>
    <button class="flagstone-remove">&#215;</button>
    <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Accusamus ducimus unde amet quam omnis aliquid aliquam culpa, explicabo ut officia illum doloremque debitis, fugiat eos. Hic cupiditate sapiente placeat temporibus. Accusamus ducimus unde amet quam omnis.</p>
  </section>
  <section class="flagstone-drag-handle">
    <h2>8</h2>
    <button class="flagstone-remove">&#215;</button>
    <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Accusamus ducimus unde amet quam omnis aliquid aliquam culpa, explicabo ut officia illum doloremque debitis, fugiat eos. Hic cupiditate sapiente placeat temporibus. Lorem ipsum dolor sit amet, consectetur adipisicing elit. Ullam quibusdam placeat dolorum natus voluptatum reiciendis cupiditate, cum veritatis accusamus labore consectetur ab amet, sit commodi laudantium beatae molestiae iste repellendus.</p>
  </section>
  <section class="flagstone-drag-handle">
    <h2>9</h2>
    <button class="flagstone-remove">&#215;</button>
    <p>Lorem ipsum dolor sit amet.</p>
  </section>
  <section class="flagstone-drag-handle">
    <h2>10</h2>
    <button class="flagstone-remove">&#215;</button>
    <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Accusamus ducimus unde amet quam omnis aliquid aliquam culpa, explicabo ut officia illum doloremque debitis, fugiat eos. Hic cupiditate sapiente placeat temporibus.</p>
    <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Accusamus ducimus unde amet quam omnis aliquid aliquam culpa, explicabo ut officia illum doloremque debitis, fugiat eos. Hic cupiditate sapiente placeat temporibus.</p>
  </section>
  <section class="flagstone-drag-handle">
    <h2>11</h2>
    <button class="flagstone-remove">&#215;</button>
    <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Accusamus.</p>
  </section>
</article>





<!-- <article>
  <section>
    <h2>1</h2>
    <button class="flagstone-remove">&#215;</button>
    <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Accusamus ducimus unde amet quam omnis aliquid aliquam culpa, explicabo ut officia illum doloremque debitis, fugiat eos. Hic cupiditate sapiente placeat temporibus.</p>
  </section>
  <section>
    <h2>2</h2>
    <button class="flagstone-remove">&#215;</button>
    <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Accusamus ducimus unde amet quam omnis aliquid aliquam culpa, explicabo ut officia illum doloremque debitis, fugiat eos. Hic cupiditate sapiente placeat temporibus.</p>
    <img src="http://placebear.com/160/160" alt="" style="float:left;width:80px;margin:10px 10px 10px 0;"/>
    <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Accusamus ducimus unde amet quam omnis aliquid aliquam culpa, explicabo ut officia illum doloremque debitis, fugiat eos. Hic cupiditate sapiente placeat temporibus.</p>
    <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Accusamus ducimus unde amet quam omnis aliquid aliquam culpa, explicabo ut officia illum doloremque debitis, fugiat eos. Hic cupiditate sapiente placeat temporibus.</p>
    <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Accusamus ducimus unde amet quam omnis aliquid aliquam culpa, explicabo ut officia illum doloremque debitis, fugiat eos. Hic cupiditate sapiente placeat temporibus.</p>
  </section>
  <section>
    <h2>3</h2>
    <button class="flagstone-remove">&#215;</button>
    <img src="http://placebear.com/260/80" alt="" />
    <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit.</p>
  </section>
  <section>
    <h2>4</h2>
    <button class="flagstone-remove">&#215;</button>
    <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Accusamus ducimus unde amet quam omnis aliquid aliquam culpa, explicabo ut officia illum doloremque debitis, fugiat eos. Lorem ipsum dolor sit amet hic cupiditate sapiente placeat temporibus.</p>
  </section>
  <section>
    <h2>5</h2>
    <button class="flagstone-remove">&#215;</button>
    <p>Lorem ipsum dolor sit amet. Hic cupiditate sapiente placeat temporibus, placeat temporibus, fugiat eos.</p>
  </section>
  <section>
    <h2>6</h2>
    <button class="flagstone-remove">&#215;</button>
    <p>Lorem ipsum dolor sit amet. Accusamus ducimus unde amet quam omnis aliquid aliquam culpa, explicabo ut officia illum doloremque debitis, fugiat eos. Hic cupiditate sapiente placeat temporibus.</p>
  </section>
  <section>
    <h2>7</h2>
    <button class="flagstone-remove">&#215;</button>
    <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Accusamus ducimus unde amet quam omnis aliquid aliquam culpa, explicabo ut officia illum doloremque debitis, fugiat eos. Hic cupiditate sapiente placeat temporibus. Accusamus ducimus unde amet quam omnis.</p>
  </section>
  <section>
    <h2>8</h2>
    <button class="flagstone-remove">&#215;</button>
    <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Accusamus ducimus unde amet quam omnis aliquid aliquam culpa, explicabo ut officia illum doloremque debitis, fugiat eos. Hic cupiditate sapiente placeat temporibus. Lorem ipsum dolor sit amet, consectetur adipisicing elit. Ullam quibusdam placeat dolorum natus voluptatum reiciendis cupiditate, cum veritatis accusamus labore consectetur ab amet, sit commodi laudantium beatae molestiae iste repellendus.</p>
  </section>
  <section>
    <h2>9</h2>
    <button class="flagstone-remove">&#215;</button>
    <p>Lorem ipsum dolor sit amet.</p>
  </section>
  <section>
    <h2>10</h2>
    <button class="flagstone-remove">&#215;</button>
    <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Accusamus ducimus unde amet quam omnis aliquid aliquam culpa, explicabo ut officia illum doloremque debitis, fugiat eos. Hic cupiditate sapiente placeat temporibus.</p>
    <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Accusamus ducimus unde amet quam omnis aliquid aliquam culpa, explicabo ut officia illum doloremque debitis, fugiat eos. Hic cupiditate sapiente placeat temporibus.</p>
  </section>
  <section>
    <h2>11</h2>
    <button class="flagstone-remove">&#215;</button>
    <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Accusamus.</p>
  </section>
</article> -->

<div style="position:absolute;z-index:9999;top:0;right:0;display:block;width:100px;height:100px;border-radius:50% 0 50% 50%;padding:2px;color:#fff;box-shadow:inset 0 0 15px 0 #000;background:#333;font-family:'Georgia',sans-serif;font-size:14px;text-align:center;"><p style="margin-top:10px;"><span style="display:block;">On</span><a href="https://github.com/depthdev" target="_blank" style="display:block;color:#08f;">Github</a><span style="display:block;">and</span><a href="http://depthdev.com/" target="_blank" style="color:#08f;">Depth</a></p></div>

<script>
// Download plugin from https://github.com/depthdev/flagstonejs

/*
  FlagstoneJS v4.0.0
  (c) 2015-2018 Depth Development. http://depthdev.com
  License: MIT
*/
!function(e,t){"use strict";e.flagstone=function(n,r){function a(n,r){function a(){for(var e=0,t=k.length;e<t;e++)Math.random()<q&&k.splice(e,0,!1)}function o(){L.style.visibility="hidden"}function s(){L.style.visibility="visible"}function i(){var t=[w],n=0,r=O.length;for(M=[];n<r;n++){if(n<w)k[n]?(k[n].style.transform="translate("+(A*n+(n?C*n+E:E))+"px,"+E+"px)",Z&&(k[n].style.height=k[n].style.width),t[n]=O[n]+E,ae(k[n],n),M.push([k[n]])):w>1&&(t[n]=A+E);else{var a=Math.min.apply(null,t),o=t.indexOf(a);k[n]?(k[n].style.transform="translate("+(A*o+(o?C*o+E:E))+"px,"+(a+C)+"px)",Z&&(k[n].style.height=k[n].style.width),t[o]+=O[n]+C,ae(k[n],n),M[o].push(k[n])):w>1&&(t[o]+=A+C)}b=(Math.max.apply(null,t)||O[0]+E)+E,L.style.height=b+"px"}e.setTimeout(s)}function l(t){if(k.length){y=L.offsetWidth,y<T+(E?2*E:0)&&(y=T),D=Math.floor(y/T),w=D>x?x:D,A=y/w-(C*(w-1)+2*E)/w,O=[];for(var 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instanceof HTMLElement?e.target:e.target.parentElement;ce.targetElem&&!ce.targetElem.classList.contains("flagstone-drag-handle");)ce.targetElem=ce.targetElem.parentElement;if(ce.targetElem)for(ce.dragStone=ce.targetElem;ce.dragStone&&!ce.dragStone.classList.contains(B);)ce.dragStone=ce.dragStone.parentElement},mouseDown:function(e){ce.getTargetElem(e)},dragStart:function(e){return!!ce.targetElem&&(ce.dragStone.classList.add("flagstone-drag"),void(e.dataTransfer&&e.dataTransfer.setData("text",this.id)))},touchStart:function(e){ce.getTargetElem(e),ce.dragStart(e)},dragEnter:function(t){t.preventDefault(),t.stopPropagation(),this!==ce.dragStone&&this!==ce.targetStone&&this!==L&&(e.clearTimeout(ce.autoDropTimer),ce.autoDropTimer=e.setTimeout(ce.autoDrop,J))},touchMove:function(e){if(!ce.dragStone)return!1;e.preventDefault(),e.stopPropagation();for(var n=t.elementFromPoint(e.touches[0].clientX,e.touches[0].clientY),r=n;r&&!r.classList.contains(B);)r=r.parentElement;r?(L.classList.remove("flagstone-dragover"),ce.targetStoneOverLeft=r.getBoundingClientRect().left+r.offsetWidth/2>e.touches[0].clientX,ce.targetStone&&ce.targetStone!==r&&(ce.targetStone.classList.remove("flagstone-dragover"),ce.targetStone.classList.remove("flagstone-left"),ce.targetStone.classList.remove("flagstone-right")),ce.targetStone=r,ce.targetStone.classList.contains("flagstone-lock")||(ce.targetStone.classList.add("flagstone-dragover"),ce.targetStoneOverLeft?(ce.targetStone.classList.remove("flagstone-right"),ce.targetStone.classList.add("flagstone-left")):(ce.targetStone.classList.remove("flagstone-left"),ce.targetStone.classList.add("flagstone-right")))):n===L&&(ce.targetStone.classList.remove("flagstone-dragover"),ce.targetStone.classList.remove("flagstone-left"),ce.targetStone.classList.remove("flagstone-right"),L.classList.add("flagstone-dragover"),ce.targetStone=L)},dragOver:function(e){return!!ce.dragStone&&(e.preventDefault(),e.stopPropagation(),e.dataTransfer.dropEffect="move",void(this!==ce.dragStone&&this.classList.contains(B)?(ce.targetStone=this,ce.targetStone.classList.add("flagstone-dragover"),ce.targetStoneOverLeft=this.getBoundingClientRect().left+this.offsetWidth/2>e.clientX,ce.targetStoneOverLeft?(ce.targetStone.classList.remove("flagstone-right"),ce.targetStone.classList.add("flagstone-left")):(ce.targetStone.classList.remove("flagstone-left"),ce.targetStone.classList.add("flagstone-right")),this.classList.remove("flagstone-dragover"),ce.targetStone!==L&&L.classList.remove("flagstone-dragover")):this===L&&this.classList.add("flagstone-dragover")))},dragEnd:function(){ce.clear()},touchEnd:function(){ce.dragStone&&ce.targetStone&&!ce.targetStone.classList.contains("flagstone-lock")&&K(ce.dropStone,ce.targetStone)&&(ce.targetStone===L?L.appendChild(ce.dragStone):ce.targetStoneOverLeft?L.insertBefore(ce.dragStone,ce.targetStone):L.insertBefore(ce.dragStone,ce.targetStone.nextElementSibling)),ce.clear()},dragLeave:function(){ce.targetStone&&(ce.targetStone.classList.remove("flagstone-dragover"),ce.targetStone.classList.remove("flagstone-left"),ce.targetStone.classList.remove("flagstone-right"),L.classList.remove("flagstone-dragover"))},drop:function(t){if(!ce.dragStone)return!1;if(t.stopPropagation(),e.clearTimeout(ce.autoDropTimer),ce.dragStone!==this&&(this.classList.contains(B)||this===L)){if(ce.targetStone=this,ce.targetStone===L){if(!K(ce.dragStone,ce.targetStone))return ce.clear(),!1;ce.targetStone.appendChild(ce.dragStone)}else if(ce.targetStoneOverLeft){if(!K(ce.dragStone,ce.targetStone))return ce.clear(),!1;ce.targetStone.parentElement.insertBefore(ce.dragStone,ce.targetStone)}else{if(!K(ce.dragStone,ce.targetStone.nextElementSibling))return ce.clear(),!1;ce.targetStone.parentElement.insertBefore(ce.dragStone,ce.targetStone.nextElementSibling)}ce.clear(),e.MutationObserver||!oe&&!se||de()}return!1}};return de=function(){k=Array.prototype.slice.call(L.children);for(var t=0,n=k.length;t<n;t++)k[t].classList.add(B),I&&(k[t].style.zIndex=n-t);if(ie)for(var r=L.getElementsByTagName("img"),o=0,s=r.length;o<s;o++)r[o].naturalWidth||(r[o].removeEventListener("load",l),r[o].addEventListener("load",l),r[o].removeEventListener("error",l),r[o].addEventListener("error",l));for(t=0;t<n;t++)k[t].removeAttribute("draggable"),k[t].removeEventListener("mousedown",ce.mouseDown),k[t].removeEventListener("dragstart",ce.dragStart),k[t].removeEventListener("touchstart",ce.touchStart),k[t].removeEventListener("touchmove",ce.touchMove),k[t].removeEventListener("dragover",ce.dragOver),k[t].removeEventListener("dragleave",ce.dragLeave),k[t].removeEventListener("dragend",ce.dragEnd),k[t].removeEventListener("touchend",ce.touchEnd),k[t].removeEventListener("drop",ce.drop),k[t].removeEventListener("touchend",ce.drop),k[t].removeEventListener("dragenter",ce.dragEnter);if(L.removeEventListener("dragover",ce.dragOver),L.removeEventListener("drop",ce.drop),G){for(t=0;t<n;t++)k[t].classList.contains("flagstone-lock")||(k[t].setAttribute("draggable","true"),k[t].addEventListener("mousedown",ce.mouseDown),k[t].addEventListener("dragstart",ce.dragStart),k[t].addEventListener("touchstart",ce.touchStart),k[t].addEventListener("touchmove",ce.touchMove),k[t].addEventListener("dragover",ce.dragOver),k[t].addEventListener("dragleave",ce.dragLeave),k[t].addEventListener("dragend",ce.dragEnd),k[t].addEventListener("touchend",ce.touchEnd),k[t].addEventListener("drop",ce.drop),k[t].addEventListener("touchend",ce.drop),J&&k[t].addEventListener("dragenter",ce.dragEnter),k[t].getElementsByClassName("flagstone-drag-handle").length||k[t].classList.add("flagstone-drag-handle"));L.addEventListener("dragover",ce.dragOver),L.addEventListener("drop",ce.drop)}(P||N)&&(P&&k.sort(function(){return.5-Math.random()}),N&&a());var i=L.getElementsByClassName("flagstone-remove");for(t=0,n=i.length;t<n;t++)i[t].removeEventListener("click",g),i[t].addEventListener("click",g),i[t].removeEventListener("keydown",g),i[t].addEventListener("keydown",g);for(i=L.getElementsByClassName("flagstone-reset"),t=0,n=i.length;t<n;t++)i[t].removeEventListener("click",d),i[t].addEventListener("click",d),i[t].removeEventListener("keydown",d),i[t].addEventListener("keydown",d);for(i=L.getElementsByClassName("flagstone-resize-height"),t=0,n=i.length;t<n;t++)i[t].removeEventListener("click",m),i[t].addEventListener("click",m),i[t].removeEventListener("keydown",m),i[t].addEventListener("keydown",m);l(),e.setTimeout(function(){l(!0)},W)},function(){if(o(),L.classList.add("flagstone-"+S+"-bed"),!t.getElementById("flagstone-"+S+"-styles")){var n=".flagstone-"+S+"-bed{box-sizing:border-box;list-style-type:none;overflow:hidden;position:relative;min-width:"+(T+2*E)+"px;}",r=".flagstone-"+S+"-bed__stone{box-sizing:border-box;position:absolute;top:0px;"+z+":0px;margin:0;}",a=".flagstone-"+S+"-bed__stone{transition:transform "+H+"s "+R+(F?",width "+H+"s "+R:"")+(_?",height "+X+"s "+j:"")+";}",s=n+r+a,i=t.createElement("style");i.type="text/css",i.id="flagstone-"+S+"-styles",i.appendChild(t.createTextNode(s)),t.head.appendChild(i)}if(de(),e.removeEventListener("resize",f),e.addEventListener("resize",f),e.MutationObserver&&(oe||se)){var l=new e.MutationObserver(v);se&&ie?l.observe(L,{childList:!0,subtree:!0,attributes:!0,attributeFilter:["src"]}):l.observe(L,{childList:!0,subtree:se})}}(),{adjust:h,destroy:u,resizeHeight:c,hide:o,reset:f,hardReset:de}}return e.flagstone.index++,new a(n,r)},e.flagstone.index=-1}(window,document);
</script>
              
            
!

CSS

              
                @import url('https://fonts.googleapis.com/css?family=Open+Sans');

$white: #fff;
$gray--dark: #5d646e;
$gray: #868080;
$gray--light: #aaa;
$yellow: #ff0;

*,*:before,*:after{box-sizing:border-box;margin:0;padding:0;}

html{background:#777;}
body{font:400 18px/1.4 "Open Sans", sans-serif;margin:0 2vw;background:inherit;min-height:1100px}
h1{margin:10px;padding-top:30px;font-size:48px;color:#aaa;text-shadow:0 0 5px $gray--dark;text-align:center}
h1 a{text-decoration:none;color:inherit;}
.slogan {display:block;font-size:10px;text-shadow: initial;text-transform:uppercase;letter-spacing:8px;text-indent:8px;}
.quick-info {display:block;margin: 10px 0;font-family:sans-serif;font-size:11px;text-shadow:initial;text-align:center;text-transform:uppercase;color:#aaa;}
button{border:none;outline:none;}
p{margin-top:1em;}

.adjust {
	position: fixed;
	z-index: 100;
	top: -290px;
	left: 0;
	width: 350px;
	height: 290px;
  border-radius: 0 0 10px 0;
	padding: 10px 10px 0 10px;
	background-color: $gray--light;
	color: $white;
	font-size: 12px;
	transition: top 0.25s ease;
	box-shadow: 4px 4px 4px 0 $gray--dark;
	&.active {
		top: 0px;
	}
	.toggle-widget {
    padding-top: 10px;
		margin-top: 10px;
		font-size: 16px;
    color: $yellow;
		cursor: pointer;
    user-select: none;
		&:after {
			content: "";
			display: table;
			clear: both;
		}
		p {
			float: left;
			margin: 0;
		}
		button {
			float: right;
			background: none;
      line-height: 1em;
      font-size: 18px;
      color: inherit;
		}
	}
	table {
    table-layout: fixed;
		border-collapse: collapse;
	}
	th {
		border-bottom: 1px solid $white;
		padding-bottom: 4px;
		font-weight: 800;
    &:first-of-type {
      width: 50%;
    }
	}
	td {
		padding-top: 4px;
	}
	tfoot {
		button {
			padding: 5px;
			background: $yellow;
			color: $gray--dark;
			cursor: pointer;
			&:focus {
				box-shadow: 2px 2px 4px 0 #000;
			}
		}
	}
	input,
	textarea {
		color: $gray--dark;
	}
	textarea {
		width: 100%;
		height: 33px;
	}
}

.add-card {
  margin-bottom: 10px;
	padding: 5px;
	background: $yellow;
	color: $gray--dark;
	cursor: pointer;
	&:focus {
		box-shadow: 2px 2px 4px 0 #000;
	}
}

article{margin-bottom:100px;background:#aaa;}
article section{overflow-y:auto;padding:15px;background-image:linear-gradient(to bottom right,$gray--dark,$gray);color:#fff;}

img{width:100%;}

iframe{width:100%;height:56.25%;}

.p-animate {
	overflow: hidden;
	max-height: 40px;
	transition: max-height 0.25s ease;
	&.active {
		max-height: 200px;
		& + .show-more {
			display: none;
			& + .show-less {
				display: inline-block;
			}
		}
	}
	& + .show-more {
		display: inline-block;
		& + .show-less {
			display: none;
		}
	}
}

.toggle-more {
	padding: 5px;
	background: $yellow;
	color: $gray--dark;
	cursor: pointer;
	&:focus {
		box-shadow: 2px 2px 4px 0 #000;
	}
}

.highlight{
	background: $yellow;
	color: $gray--dark;
}

.flagstone-remove {
	position: absolute;
	top: 0;
	right: 10px;
	margin: 0;
	opacity: 0.25;
	padding: 0;
	background: none;
	cursor: pointer;
	font-size: 24px;
	&:focus,
	&:hover {
		opacity: 1;
	}
}

.flagstone-0-bed.flagstone-dragover {
	box-shadow: inset 0 0 4px 4px $yellow;
}

.flagstone-drag {
	filter: grayscale(1) blur(4px);
	opacity: 0.25;
}

.flagstone-left {
	box-shadow: -8px 0 4px -4px $yellow;
}

.flagstone-right {
	box-shadow: 8px 0 4px -4px $yellow;
}

              
            
!

JS

              
                // Full documentation: https://github.com/depthdev/flagstonejs

const fs = flagstone(document.getElementsByTagName('article')[0], {
  //bedPadding: 10, // The padding around the area edge
  //stonesMargin: 10, // Margin between stones in pixels (as an int)
  margin: 10, // This overrides bedPadding & stonesMargin and is equivalent to setting them both to this value
  minWidth: 280, // Minimum width you want an element to be in pixels (as an int)
  maxColumns: 5, // Maximum number of columns to display (as an int)
  flow: true, // Allows stone widths to flow during a resize event
  direction: 'left', // Alternative is "right"; the default is "left"; and for top to bottom, use CSS's built in Columns or Flexbox
  assignReverseZIndexes: false,
  random: false, // Display stones in a random order; the default is false (as a boolean)
  square: false, // Makes each flagstone square; default is false
  space: false, // Spaces out stones randomly (as a boolean)
  spaceFrequency: 0.4, // Adjusts the frequency of the amount of spaces (as a float 0.0 - 1.0); default is 0.4
  animationDuration: 1000, // Animation duration (milliseconds as an int); default is 0
  animationTimingFunction: 'ease', // CSS animation timing function as a string
  heightAnimationDuration: 2500,
  heightAnimationTimingFunction: 'ease',
  resizeDelay: 250, // Delay to run resize/reset function after resizing the window in milliseconds (as an int); default is 250
  dragAndDrop: true,
  dragAndDropAutoDelay: 1000,
  dropCallback: function(dragElem, targetElem) {
    // console.log(dragElem);
    // console.log(targetElem);
    return true;
  },
  eventResetDelay: 250,
  eventResizeHeightDuration: 250,
  callback: function(elem, index) { // Warning! This gets called every soft reset, so if you're attaching listeners, you'll need to remove the listeners first!
    if (index === 3) {
      elem.classList.add('highlight');
    } else {
      elem.classList.remove('highlight');
    }
  }, // Callback function for each element with index and element arguments
  watch: true,
  watchAll: true,
  watchImages: true
});












/* DEMO-ONLY FUNCTIONS */

function adjust() {
  const $ = function(s){return document.getElementById(s);};
  fs.adjust({
    //margin: 10,
    bedPadding: window.parseInt($('adjust-bed-padding').value,10),
    stonesMargin: window.parseInt($('adjust-stones-margin').value,10),
    minWidth: window.parseInt($('adjust-min-width').value,10),
    maxColumns: window.parseInt($('adjust-max-columns').value,10),
    dragAndDrop: $('adjust-drag-and-drop').checked,
    dropCallback: window.eval('(' + $('adjust-drop-callback').value + ')'),
    callback: window.eval('(' + $('adjust-callback').value + ')')
  });
}

function toggleMore(e) {
  const p = e.target.parentElement.getElementsByClassName('p-animate')[0];
  if (p.classList.contains('active')) {
    p.classList.remove('active');
  } else {
    p.classList.add('active');
  }
}

function toggleWidget(e) {
  const container = e.currentTarget.parentElement;
  if (container.classList.contains('active')) {
    container.classList.remove('active');
  } else {
    container.classList.add('active');
  }    
}

function addCard() {
  const section = document.createElement('section');
  section.classList.add('flagstone-drag-handle');
  section.innerHTML = '<h2>New Card</h2><button class="flagstone-remove">&#215;</button><p>Lorem ipsum dolor sit amet. Hic cupiditate sapiente placeat temporibus, placeat temporibus, fugiat eos.</p><p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Velit tempora itaque maxime, enim, nam quas nobis voluptate, minus ex adipisci aperiam provident sequi soluta. Praesentium et, placeat porro dolorum voluptate.</p>';
  document.getElementsByTagName('article')[0].appendChild(section);
}

Array.prototype.slice.call(document.getElementsByClassName('toggle-more')).forEach(function(e) {
  e.addEventListener('click', toggleMore);
});

document.getElementsByClassName('toggle-widget')[0].addEventListener('click', toggleWidget);

document.getElementsByClassName('apply-adjustments')[0].addEventListener('click', adjust);

document.getElementsByClassName('add-card')[0].addEventListener('click', addCard);

window.setTimeout(function() {
  document.getElementById('change-my-source').src = 'http://placebear.com/400/400';
}, 3000);

              
            
!
999px

Console