We Keep Coding

Improve display/performance of 2 column infinite scroll layout on resize of browser

I have a UI that involves (on wider devices) a 2 column layout that scroll in opposite directions in an infinite loop. On page load the UI seems to work pretty well but I really need some help improving some aspects of it.
The key things I want to work on are:
Order of items (projects) matches HTML structure. Currently they're reversed
Improve how the UI reacts and displays on browser resize
Fix ESLint undefined errors for "Map" and Weakmap"
1. Order of Items (projects)
You can see I've number each .project and on load the one that appears last in the HTML is first when viewing the webpage. It would make more sense the 'top' item is visible in the viewport before revealing the others in cascading order on scroll.
2. UI on Browser Resize
Though the UI seems to work well on page load, I think due to the positional values set on each .project this seems to lead to content overlapping or getting cropped on resize. I've tried matchMedia to see if I can run/recalculate once the viewport has 'stopped' resizing but doesn't seem to work.
It doesn't seem as bad going from desktop to mobile size screens. But vice versa, if you open on a narrow viewport and enlarge no content is visible and the UI appears empty until you scroll ...and then the left column doesn't loop (it stops) until you refresh the page.
On the mid-point #media when each .project has 50vh and not 100vh on scroll the items appear to flicker. Again, until you refresh.
It seems like maybe I need to run the script again after each resize? This is for a 'fun' portfolio style project so I appreciate that's a bit heavy on the resource but maybe acceptable in this instance, as it's not a commercial or D2C site?
3. ESLint Errors
Lastly, I get 2 errors saying Map and Weakmap are undefined when I compile using CodeKit and ESLint. That is in relation to these 2 lines...
const lastScrollPos = new WeakMap();
const linkedLoops = new Map([
I know there's a couple of issues but I wanted to break them down to try and be as clear as possible.
const leftLoop = document.querySelector(".split-loop__left");
const rightLoop = document.querySelector(".split-loop__right");
const scrollHeight = leftLoop.scrollHeight;
const offsetBoundary = 200; //the offset from the borders at which the element reordering event is triggered
const lastScrollPos = new WeakMap();
const linkedLoops = new Map([
[leftLoop, rightLoop],
[rightLoop, leftLoop]
]);
let scrollLockElement = null;
let scrollLockTimeout = null;
// the function sets handlers to scrolling for infinite scrolling
function infiniteScrollHandler(loop) {
const virtualLoop = Array.from(loop.children);
virtualLoop.forEach(
(el) => (el.style.top = scrollHeight / 2 + el.offsetHeight + "px")
);
loop.addEventListener("scroll", () => {
if (virtualLoop.length < 2) return; // not enough items to scroll
const topBound = loop.scrollTop;
const bottomBound = loop.scrollTop + loop.offsetHeight;
const firstEl = virtualLoop[0];
const lastEl = virtualLoop[virtualLoop.length - 1];
if (firstEl.offsetTop >= topBound - offsetBoundary) {
lastEl.style.top = firstEl.offsetTop - lastEl.offsetHeight + "px";
virtualLoop.unshift(lastEl);
virtualLoop.pop();
} else if (
lastEl.offsetTop + lastEl.offsetHeight <
bottomBound + offsetBoundary
) {
firstEl.style.top = lastEl.offsetTop + lastEl.offsetHeight + "px";
virtualLoop.push(firstEl);
virtualLoop.shift();
}
});
}
// the function sets handlers to scrolling for reverse interaction with the linked loop
function reverseLinkLoopHandler(loop) {
loop.addEventListener("scroll", () => {
const delta = lastScrollPos.get(loop) - loop.scrollTop;
lastScrollPos.set(loop, loop.scrollTop);
// this is blocked to prevent deadlock when events of two blocks are called each other.
{
if (scrollLockElement !== null && scrollLockElement !== loop)
return;
scrollLockElement = loop;
clearTimeout(scrollLockTimeout);
scrollLockTimeout = setTimeout(
() => (scrollLockElement = null),
300
);
}
linkedLoops
.get(loop)
.scrollTo(0, linkedLoops.get(loop).scrollTop + delta);
});
}
// set scroll handlers on all loops
linkedLoops.forEach((loop) => {
infiniteScrollHandler(loop);
loop.scrollTo(0, scrollHeight / 2);
lastScrollPos.set(loop, scrollHeight / 2);
reverseLinkLoopHandler(loop);
});
/* Hide Scroll Bars */
::-webkit-scrollbar {
display: none;
}
html,
body {
margin: 0;
padding: 0;
-ms-overflow-style: none;
scrollbar-width: none;
}
/* Content will be in these eventually */
.bar-left,
.bar-right {
border-right: 2px solid black;
box-sizing: border-box;
height: 100vh;
position: fixed;
top: 0;
left: 0;
width: 48px;
z-index: 10000;
}
.bar-right {
border: none;
border-left: 2px solid black;
left: auto;
right: 0;
}
/* Split Loop */
.split-loop {
margin-left: 24px;
}
.split-loop__item {
background: white;
overflow: hidden;
}
.project {
box-sizing: border-box;
border-bottom: 2px solid black;
padding: 24px 24px 0;
width: 100%;
}
.project__media {
margin-bottom: 24px;
}
.project__img {
border: 2px solid black;
width: 100%;
max-width: 100%;
}
.project__title {
font-family: Arial;
font-size: 12px;
margin-bottom: 24px;
}
/* Tablet View */
#media screen and (min-width: 400px) {
.split-loop {
height: 100vh;
position: relative;
margin: 0 48px;
}
.split-loop__left {
border-right: 2px solid black;
box-sizing: border-box;
width: 50%;
}
.split-loop__right {
position: fixed;
right: 24px;
bottom: 0;
width: calc(50% - 48px);
}
.split-loop__item {
display: flex;
flex-flow: column;
height: 50vh;
}
.project__media {
display: flex;
flex-grow: 1;
align-items: center;
justify-content: center;
overflow: hidden;
margin-bottom: 24px;
}
.project__img {
box-sizing: border-box;
display: block;
margin-bottom: 0;
width: auto;
max-width: 100%;
height: 100%;
max-height: 100%;
object-fit: contain;
overflow: hidden;
}
/* Split Loop */
.split-loop {
position: relative;
margin: 0 48px;
}
.split-loop__left {
width: 50%;
overflow: auto;
position: relative;
max-height: 100vh;
}
.split-loop__right:before,
.split-loop__left:before {
display: block;
content: "";
z-index: -1;
height: 9999999px;
}
.split-loop__right {
box-sizing: border-box;
position: fixed;
right: 48px;
bottom: 0;
z-index: 5;
width: calc(50% - 48px);
overflow: auto;
max-height: 100vh;
}
.project {
box-sizing: border-box;
border-bottom: 2px solid black;
padding: 24px 24px 0;
position: absolute;
}
}
#media screen and (min-width: 600px) {
.split-loop__item {
height: 100vh;
}
}
<header class="bar-left"></header>
<div class="bar-right"></div>
<div class="split-loop" role="main">
<div class="split-loop__left">
<div class="split-loop__item project">
<div class="project__media">
<img src="https://www.fillmurray.com/g/600/800" alt="" class="project__img" />
</div>
<div class="project__copy">
<h2 class="project__title">Project Left #1</h2>
</div>
</div>
<div class="split-loop__item project">
<div class="project__media">
<img src="https://www.fillmurray.com/600/800" alt="" class="project__img" />
</div>
<div class="project__copy">
<h2 class="project__title">Project Left #2</h2>
</div>
</div>
<div class="split-loop__item project">
<div class="project__media">
<img src="https://www.fillmurray.com/g/600/800" alt="" class="project__img" />
</div>
<div class="project__copy">
<h2 class="project__title">Project Left #3</h2>
</div>
</div>
<div class="split-loop__item project">
<div class="project__media">
<img src="https://www.fillmurray.com/600/800" alt="" class="project__img" />
</div>
<div class="project__copy">
<h2 class="project__title">Project Left #4</h2>
</div>
</div>
</div>
<div class="split-loop__right">
<div class="split-loop__item project">
<div class="project__media">
<img src="https://www.fillmurray.com/600/800" alt="" class="project__img" />
</div>
<div class="project__copy">
<h2 class="project__title">Project Right #1</h2>
</div>
</div>
<div class="split-loop__item project">
<div class="project__media">
<img src="https://www.fillmurray.com/g/600/800" alt="" class="project__img" />
</div>
<div class="project__copy">
<h2 class="project__title">Project Right #2</h2>
</div>
</div>
<div class="split-loop__item project">
<div class="project__media">
<img src="https://www.fillmurray.com/600/800" alt="" class="project__img" />
</div>
<div class="project__copy">
<h2 class="project__title">Project Right #3</h2>
</div>
</div>
<div class="split-loop__item project">
<div class="project__media">
<img src="https://www.fillmurray.com/g/600/800" alt="" class="project__img" />
</div>
<div class="project__copy">
<h2 class="project__title">Project Right #4</h2>
</div>
</div>
</div>
</div>

How to Move Images a Certain Amount of Pixels Using Javascript

I am trying to move images inside of a container using Javascript. Ultimately, I want to move it using setTimeout, but for now trying to do it using an event listener on a button click. It seems to work, but only once. I want to keep moving the images when the button is clicked. Any help is helpful and appreciated.
<div class="images">
<img src="https://images.unsplash.com/photo-1596536220655-21429cf12ae0?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=1170&q=80"/>
</div>
<div class="images">
<img src="https://images.unsplash.com/photo-1596536220655-21429cf12ae0?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=1170&q=80"/>
</div>
<div class="images">
<img src="https://images.unsplash.com/photo-1596536220655-21429cf12ae0?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=1170&q=80"/>
</div>
<div class="images">
<img src="https://images.unsplash.com/photo-1596536220655-21429cf12ae0?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=1170&q=80"/>
</div>
</div>
<button id="moveIt">MOVE</button>
<style>
.container {
display: flex;
justify-content: space-around;
overflow: hidden;
max-width: 100%;
z-index: 222;
}
.images {
width: 300px !important;
display: block;
text-align: center;
margin-right: 10px;
height: 400px !important;
}
</style>
<script>
let images = document.querySelectorAll('.images');
const moveBtn = document.getElementById('moveIt');
let pleaseWork = () => {
for(i=0; i < images.length; i++) {
images[i].style.marginLeft = "-300px";
}
}
moveBtn.addEventListener('click', pleaseWork);
</script>

You are setting margin-left to a static number rather than incrementing it. Here's an example that accesses the current margin-left, strips it of the 'px', converts that to a number, then increments it and applies it back to the element.
let images = document.querySelectorAll('.images');
const moveBtn = document.getElementById('moveIt');
let increment = -10
let pleaseWork = () => {
for (i = 0; i < images.length; i++) {
let ml = Number(images[i].style.marginLeft.replaceAll('px', ''))
ml += increment
images[i].style.marginLeft = `${ml}px`;
}
}
moveBtn.addEventListener('click', pleaseWork);
.container {
display: flex;
justify-content: space-around;
overflow: hidden;
max-width: 100%;
z-index: 222;
}
.images {
width: 300px !important;
display: block;
text-align: center;
margin-right: 10px;
height: 400px !important;
}
<div class="images">
<img src="https://images.unsplash.com/photo-1596536220655-21429cf12ae0?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=1170&q=80" />
</div>
<div class="images">
<img src="https://images.unsplash.com/photo-1596536220655-21429cf12ae0?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=1170&q=80" />
</div>
<div class="images">
<img src="https://images.unsplash.com/photo-1596536220655-21429cf12ae0?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=1170&q=80" />
</div>
<div class="images">
<img src="https://images.unsplash.com/photo-1596536220655-21429cf12ae0?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=1170&q=80" />
</div>
</div>
<button id="moveIt">MOVE</button>

Height of Element Issue

I have the following code:
.embed-responsive {
position: relative;
display: block;
height: 0;
padding: 0;
overflow: hidden;
}
.resume .resume-title {
font-size: 26px;
font-weight: 700;
margin-top: 20px;
margin-bottom: 20px;
color: #050d18;
}
.resume .resume-item {
position: relative;
text-align: center;
}
.add {
padding: 0;
}
#media all and (max-width: 500px) {
.embed-responsive {
height: auto;
}
}
<section id="resume" class="resume">
<div class="container">
<div class="section-title">
<h2>Resumè
</h2>
</div>
<div class="resume-item">
<iframe src="https://drive.google.com/file/d/1QQ3lCOVEBd551AuNOA-XA4x6s1I3AaCZ/preview" width="100%" height="1070"></iframe>
</div>
</div>
</section>
So on my end since I have the above code embedded in a website, the output looks like this:
However, when I view the website using a smaller screen, I am getting this output:
The problem is that the "template" (which is the grey part) extends to height: 1070 even on responsive mode. I want the grey part to end after the document with some margin like shown in the very first picture when you view it on a smaller device.
Expected Output:
Larger Screen
Same picture as the very first picture I sent, so no changes here really.
Smaller Screen:
The Blue Line is where the grey part should end, with some margin in between the document and grey part, as there is at the top. Any suggestions on how I can accomplish this?

I believe something like this:
made a class for the iframe, for the media query I put 140vw
why 140vw? the ratio of an A4 paper is around 1.4 (if you know its some other format... just change the ratio...) this means the height is 1.4 the width, so you can use that instead of a number as you're doing in the default settings.
.embed-responsive {
position: relative;
display: block;
height: 0;
padding: 0;
overflow: hidden;
}
.resume .resume-title {
font-size: 26px;
font-weight: 700;
margin-top: 20px;
margin-bottom: 20px;
color: #050d18;
}
.resume .resume-item {
position: relative;
text-align: center;
}
.add {
padding: 0;
}
.iframe {
height: 1070px;
}
#media all and (max-width: 500px) {
.embed-responsive {
height: auto;
}
.iframe {
height: 140vw;
}
}
<section id="resume" class="resume">
<div class="container">
<div class="section-title">
<h2>Resumè
</h2>
</div>
<div class="resume-item">
<iframe src="https://drive.google.com/file/d/1QQ3lCOVEBd551AuNOA-XA4x6s1I3AaCZ/preview" width="100%" class="iframe"></iframe>
</div>
</div>
</section>

Why is my jquery code not working or throwing any errors?

You can checkout my project here: http://jsfiddle.net/raj4dev/2o4uapc9/1/
Summary: I am making a jquery image slider. You can change the image in a box by pressing next and previous arrows. Currently, I have added code only for the next arrow.
Issue: Nothing happens when I click the next arrow. I don't see any errors in the chrome developer tools.
Please tell me how I can debug and fix this issue ?
Code here.
HTML:
<!DOCTYPE html>
<body>
<div id="container">
<header>
<h1>jQuery content slider</h1>
</header>
<img src="http://icongal.com/gallery/image/337589/small_arrow_left.png" alt="Prev" id="prev">
<div id="slider">
<div class="slide">
<div class="slide-copy">
<h2>Slide 1</h2>
<p>Dance and slide!</p>
</div>
<img src="http://m.rgbimg.com/cache1ny0NN/users/j/ja/jana_koll/600/mfOAUfa.jpg" alt="an image">
</div>
<div class="slide">
<div class="slide-copy">
<h2>Slide 2</h2>
<p>Dance and slide!</p>
</div>
<img src="https://s-media-cache-ak0.pinimg.com/736x/f9/2e/c0/f92ec0238d508e029be8b7163205d24e.jpg" alt="an image">
</div>
<div class="slide">
<div class="slide-copy">
<h2>Slide 3</h2>
<p>Dance and slide!</p>
</div>
<img src="http://www.pptbackgroundstemplates.com/backgrounds/abstract-red-light-wave-ppt-backgrounds-powerpoint.jpg" alt="an image">
</div>
</div>
<img src="http://icons.iconarchive.com/icons/saki/nuoveXT/128/Small-arrow-right-icon.png" alt="Next" id="next">
</div>
</body>
JS:
$(document).ready(function() {
var sliding_speed = 500;
var autoswitch = true;
var autoswitch_speed = 4000;
$('.slide').first().addClass('active');
//Hide all slides, but...
$('.slide').hide();
//...show only the first slide
$('.active').show();
$('#next').on('click', function(){
$('.active').removeClass('active').addClass('oldActive'); /*'Hide the currently active slide and mark it as oldActive so that you can go back to it using the previous button.'*/
if($('.oldActive').is(':last-child')) {
$('.slide').first().addClass('active');
}else {
$('.oldActive').next().addClass('active');
}
$('.oldActive').removeClass('oldActive');
});
});
CSS:
* {
margin: 0;
padding: 0;
}
body {
font-family: 'Arial', sans-serif;
font-size: 14px;
color: #fff;
background: #333;
line-height: 1.6em;
}
a {
color: #fff;
text-decoration: none;
}
h1 {
text-align: center;
margin-bottom: 20px;
}
#container {
width: 980px;
margin: 40px auto;
overflow: hidden;
}
#slider {
width: 940px;
height: 350px;
position: relative;
overflow: hidden;
float: left;
padding: 3px;
border: #666 solid 2px;
border-radius: 5px;
}
#silder img {
width: 940px;
height: 350px;
}
.slide {
position: absolute;
}
.slide-copy {
position: absolute;
bottom: 0px;
left:0;
padding: 20px;
background: #7f7f7f;
background: rgba(0,0,0,0.5);
width: 100%;
}
#prev, #next {
float: left;
margin-top: 130px;
cursor: pointer;
position: relative;
z-index: 100;
}
#prev {
margin-right: -45px;
}
#next {
margin-left: -45px;
}

You need to again hide all slide and then show only the active one. You are changing the classes to properly set your desired active slide to have the active class, but nothing says that all active slides are shown always and all other slides are hidden always.
http://jsfiddle.net/v1au2d57/
$('#next').on('click', function(){
$('.active').removeClass('active').addClass('oldActive'); /*'Hide the currently active slide and mark it as oldActive so that you can go back to it using the previous button.'*/
if($('.oldActive').is(':last-child')) {
$('.slide').first().addClass('active');
}else {
$('.oldActive').next().addClass('active');
}
$('.oldActive').removeClass('oldActive');
//Hide all slides, but...
$('.slide').hide();
//...show only the first slide
$('.active').show();
});

css columns / flexbox with no gaps between items

I need to get rid of gaps between elements in my column layout. I can use the latest css3 as the site is targeted at modern browsers/devices but I need to avoid a javascript solution such that the page as delivered from the server doesn't need to be re-rendered based on the width of the client.
Using flexbox, css columns, and other tricks I need to coax a pinterest-like layout. (Pinterest uses javascript and absolute positioning for their layout, it doesn't even render with js turned off.) The site has boxes with a known width but variable height. The number of columns needs to vary based on browser width. (I can do this via media queries if I know what css attribute to change.) Here's what this looks like: via
Also note that I can't just increase the height of the containers to fill the empty space. I want to bring the item below it UP, not make all the heights match. (So stretching items 1, 3, and 4 in the picture above is NOT what I want.)
Things I've tried:
CSS 3 columns. This looks great, but the items are in the wrong order, with the second item being under the first. If this can be changed to a different order such that they go left-to-right, great!
Flexbox various flexbox configurations, I've tried just about every setting that I was able to change.
Javascript. Yes, I know I can manually create columns and re-render them on resize. I'm looking to avoid an expensive re-render operation that requires a manual balancing of columns and display. I can resort to this for older browsers that don't support a css3 solution. I'm also wanting to avoid manually positioning all of the items. Gross.
I've put a comment link to JSFiddle because I can't put it in here as "links to jsfiddle require code".

check this demo. This is pure css3 masonry effect.
http://w3bits.com/labs/css-masonry/
spinet from above link
body {
font: 1em/1.67 'Open Sans', Arial, Sans-serif;
margin: 0;
background: #e9e9e9;
}
.wrapper {
width: 95%;
margin: 3em auto;
}
.masonry {
margin: 1.5em 0;
padding: 0;
-moz-column-gap: 1.5em;
-webkit-column-gap: 1.5em;
column-gap: 1.5em;
font-size: .85em;
}
.item {
display: inline-block;
background: #fff;
padding: 1em;
margin: 0 0 1.5em;
width: 100%;
height: 150px;
box-sizing: border-box;
-moz-box-sizing: border-box;
-webkit-box-sizing: border-box;
box-shadow: 2px 2px 4px 0 #ccc;
}
.item.black{
background-color: #000; height:200px;}
.item.blue{
background-color:blue; height:250px;}
.item.green{
background-color:green; height:300px;}
#media only screen and (min-width: 400px) {
.masonry {
-moz-column-count: 2;
-webkit-column-count: 2;
column-count: 2;
}
}
#media only screen and (min-width: 700px) {
.masonry {
-moz-column-count: 3;
-webkit-column-count: 3;
column-count: 3;
}
}
#media only screen and (min-width: 900px) {
.masonry {
-moz-column-count: 4;
-webkit-column-count: 4;
column-count: 4;
}
}
#media only screen and (min-width: 1100px) {
.masonry {
-moz-column-count: 5;
-webkit-column-count: 5;
column-count: 5;
}
}
#media only screen and (min-width: 1280px) {
.wrapper {
width: 1260px;
}
}
<div class="masonry">
<div class="item">Lorem ipsum dolor sit amet, consectetur adipisicing elit.</div>
<div class="item black">...</div>
<div class="item blue">...</div>
<div class="item green">...</div>
<div class="item black">...</div>
<div class="item blue">...</div>
<div class="item green">...</div>
<div class="item black">...</div>
<div class="item blue">...</div>
<div class="item green">...</div>
</div>
Hope this is helpful to you.

You can achieve it by flexbox:
HTML:
<div class="container">
<div class="item">1</div>
<div class="item">2</div>
<div class="item">3</div>
<div class="item">4</div>
<div class="item">5</div>
<div class="item">6</div>
</div>
CSS:
.container {
max-width: 900px;
height: 470px;
display: flex;
flex-flow: column wrap;
align-items: flex-start;
}
.item {
height: 150px;
}
http://codepen.io/asim-coder/pen/vXzKgg

CSS3: Set the main ul li that holds all 8 drop-down panels to margin: 0 auto;
mainList li {
margin: 0 auto; /*0 giving no margins on the top and bottom of the panels, and auto making the panels use all of the space within the parent, mainList. I hope this helps.*/
}

Well, a little bit late, may be this could be a solution.
I am using flex as it is the only system that can change the order as you want.
The drawbacks of this method is that I need to use some artificial elements to act as separators, and that I need to set a predetermined height on the container
.container {
border: 1px solid black;
width: 90%;
height: 700px;
display: flex;
flex-flow: column wrap;
align-items: flex-start;
}
.item {
height: 150px;
width: 24%;
margin: 2px;
}
.item:nth-child(3n + 1) {
height: 200px;
}
.item:nth-child(3n + 2) {
height: 250px;
}
.item:nth-child(4n) {
background-color: orange;
order: 40;
}
.item:nth-child(4n + 1) {
background-color: green;
order: 10;
}
.item:nth-child(4n + 2) {
background-color: lightblue;
order: 20;
}
.item:nth-child(4n + 3) {
background-color: yellow;
order: 30;
}
.divider {
width: 1px;
background-color: red;
height: 100%;
}
.divider:nth-last-child(3) {
order: 15;
}
.divider:nth-last-child(2) {
order: 25;
}
.divider:nth-last-child(1) {
order: 35;
}
<div class="container">
<div class="item">1</div>
<div class="item">2</div>
<div class="item">3</div>
<div class="item">4</div>
<div class="item">5</div>
<div class="item">6</div>
<div class="item">7</div>
<div class="item">8</div>
<div class="item">9</div>
<div class="divider"></div>
<div class="divider"></div>
<div class="divider"></div>
</div>

Use http://desandro.github.io/masonry/ Masonry will help to solve your issue, it is what Pinterest uses. My company is currently using it to develope a program, it is very easy and user friendly.