JavaScript Image Grid Different Sizes and Width

This JavaScript code snippet helps you to create image grid with different sizes and width. It arrange images in a responsive masonry grid layout that automatically adjust their sizes according to device width. You can use this code in your gallery/showcase projects.

The code snippet generates image gallery dynamically using template system.

How to Create JavaScript Image Grid with Different Sizes and Width

1. First of all, create the HTML structure as follows:

 <div id="gallery"></div>

<script type="text/tmpl" id="tmpl">
<% for (let i = 0; i < imgs.length; i++) { %>
	<div class="img" style="width:<%=imgs[i].ww%>px;height:<%=imgs[i].hh%>px">
  	<img src="<%=imgs[i].src%>"/>
  </div>
<% } %>
</script>

2. After that, add the following CSS styles into your project:

body {
  margin: 0;
}
#gallery {
	position: relative;
	padding: 5px;
}
.img {
  display: block;
  margin: 5px;
  float: left;
  background: #ececec;
}
.img img {
  width: 100%;
  height: 100%;
}

3. Finally, add the following JavaScript code and done.

(function(){
  var cache = {};

  this.tmpl = function tmpl(str, data){
    // Figure out if we're getting a template, or if we need to
    // load the template - and be sure to cache the result.
    var fn = !/\W/.test(str) ?
      cache[str] = cache[str] ||
        tmpl(document.getElementById(str).innerHTML) :

      // Generate a reusable function that will serve as a template
      // generator (and which will be cached).
      new Function("obj",
        "var p=[],print=function(){p.push.apply(p,arguments);};" +

        // Introduce the data as local variables using with(){}
        "with(obj){p.push('" +

        // Convert the template into pure JavaScript
        str
          .replace(/[\r\t\n]/g, " ")
          .split("<%").join("\t")
          .replace(/((^|%>)[^\t]*)'/g, "$1\r")
          .replace(/\t=(.*?)%>/g, "',$1,'")
          .split("\t").join("');")
          .split("%>").join("p.push('")
          .split("\r").join("\\'")
      + "');}return p.join('');");

    // Provide some basic currying to the user
    return data ? fn( data ) : fn;
  };
})();

function randomImg () {
  let count = 10 + Math.ceil(Math.random() * 10)
  let imgs = []
  for (let i = count; i > 0; i--) {
    let w = 250 + 10 * Math.ceil(Math.random() * 50)
    let h = 200 + 10 * Math.ceil(Math.random() * 50)
    imgs.push({
      src: 'https://unsplash.it/' + w + '/' + h,
      w: w,
      h: h
    })
  }
  return imgs
}
function countImgsInCol (idx, imgs) {
  let gallery = document.querySelector('#gallery')
  let gw = gallery.clientWidth
  let maxEachCol = 4
  let minH = 120
  let count = 0
  for (let i = Math.min(maxEachCol, imgs.length - idx); i > 0; i--) {
    let w = 0
    for (let j = idx; j < idx + i; j++) {
      let minW = minH * imgs[j].w / imgs[j].h
      if (minW >= gw) {
        return 1
      } else {
	      w += minW
      }
    }
    if (w < gw) {
      count = i
      break
    }
  }
  return count
}
function getCols (imgs) {
  let cols = []
  let rest = imgs.length
  let count = 1;
  for (let i = 0; i < imgs.length; i = i + count) {
    count = countImgsInCol(i, imgs)
    console.log(i, count)
    cols.push({start: i, end: i + count - 1, total: count})
  }
  return cols
}
function organizeImg (imgs) {
  let gallery = document.querySelector('#gallery')
  let galleryW = gallery.clientWidth
  let margin = 10
  let cols = getCols(imgs)
  for (let i = 0; i < cols.length; i++) {
    let col = cols[i]
    let colH = 0
    let scale = 0
    for (let j = col.start; j <= col.end; j++) {
      scale += imgs[j].w / imgs[j].h
    }
    colH = (galleryW - margin * (col.total + 1)) / scale
    console.log(colH)
    for (let k = col.start; k <= col.end; k++) {
      let img = imgs[k]
      img.hh = colH
      img.ww = colH * img.w / img.h
     }
  }
  gallery.innerHTML = tmpl('tmpl', { imgs })
}
let imgs = randomImg()
organizeImg(imgs)
window.addEventListener('resize', () => {
  organizeImg(imgs)
})

That’s all! hopefully, you have successfully integrated this image grid code snippet into your project. If you have any questions or facing any issues, feel free to comment below.

Asif Mughal

I code and create web elements for amazing people around the world. I like work with new people. New people new Experiences.
I truly enjoy what I’m doing, which makes me more passionate about web development and coding. I am always ready to do challenging tasks whether it is about creating a custom CMS from scratch or customizing an existing system.