Troubleshooting the Gutter Problem in jQuery Isotope and Masonry

Currently, I am utilizing the Isotope jQuery plugin. While it is a fantastic tool, I am encountering a minor issue with aligning items in masonry mode. The width of my container is 960px, and I aim to have 4 items perfectly aligned as if they were adhering to a 960px grid system. Essentially, I want both the left and right edges of the items to touch the edge of the container. You can see how it looks in the screenshot below:

Here is the code snippet I am using:

JS:

$('#container').isotope({
  itemSelector : '.item',
      masonry : {
          columnWidth : 240,
          gutterWidth: 10
      }
});

CSS:

.item{
width:230 px;
background:red;
overflow: hidden;
}

HTML:

<div class="item">a</div>

Currently, setting the width to 240px works but eliminates the gap between items.

EDIT

To further illustrate the issue, here is a fiddle link showcasing the problem: http://jsfiddle.net/qGJhe/

Answer №1

After reviewing your code on jsFiddle (http://jsfiddle.net/qGJhe/), I decided to test adding a background color to the container to investigate the reported extra gap issue. Surprisingly, no extra gap was visible.

Although your specified 960px width was not being honored due to the responsive nature of the layout, it became apparent that the codes you copied over might have some discrepancies from your actual page.

To counter this and enforce the fixed 960px width, I disabled the responsive code temporarily and observed the additional 10px gap as described. http://jsfiddle.net/shodaburp/qGJhe/3/

This led me to the realization that there were inaccuracies in your calculation for both the gutter size and the element's width.

It appears that an element width of 240px leaves no room for the gutter at all. http://jsfiddle.net/shodaburp/qGJhe/4/

gutterSize = (containerWidth - (elementWidth * numberOfElement) / numberOfGutters)

gutterSize = (960 - (240 * 4) ) / 3) = 0

totalWidth = (elementWidth * numberOfElement) + (gutterSize * numberOfGutters)

totalWidth = (240 * 4) + (3 * 0) = 960

extraGap = containerWidth - totalWidth 

extraGap = 960 - 960 = 0

A slight adjustment with an element width of 230px along with a gutter size of 13 reveals a 1px extra gap. http://jsfiddle.net/shodaburp/qGJhe/5/

gutterSize = (containerWidth - (elementWidth * numberOfElement) / numberOfGutters)

gutterSize = (960 - (230 * 4) ) / 3) = 13.33 = 13 (rounded)

totalWidth = (elementWidth * numberOfElement) + (gutterSize * numberOfGutters)

totalWidth = (230 * 4) + (3 * 13) = 959

extraGap = containerWidth - totalWidth 

extraGap = 960 - 959 = 1

To ensure a perfect fit for 4 elements within the 960px space, consider adjusting the element width to 225px alongside a 20px gutter size.

An element width of 225px combined with a gutter size of 20px will achieve optimal spacing! http://jsfiddle.net/shodaburp/qGJhe/6/

gutterSize = (containerWidth - (elementWidth * numberOfElement) / numberOfGutters)

gutterSize = (960 - (225 * 4) ) / 3) = 20

totalWidth = (elementWidth * numberOfElement) + (gutterSize * numberOfGutters)

totalWidth = (225 * 4) + (3 * 20) = 960

extraGap = containerWidth - totalWidth 

extraGap = 960 - 960 = 0

Answer №2

Have you implemented the updated layout mode?

The use of gutterWidth is not a standard feature. According to the documentation, you are required to include the code provided on the demonstration page.

// modified Isotope methods for gutters in masonry
$.Isotope.prototype._getMasonryGutterColumns = function() {
  var gutter = this.options.masonry && this.options.masonry.gutterWidth || 0;
      containerWidth = this.element.width();

  this.masonry.columnWidth = this.options.masonry && this.options.masonry.columnWidth ||
                // or use the size of the first item
                this.$filteredAtoms.outerWidth(true) ||
                // if there's no items, use the size of the container
                containerWidth;

  this.masonry.columnWidth += gutter;

  this.masonry.cols = Math.floor( ( containerWidth + gutter ) / this.masonry.columnWidth );
  this.masonry.cols = Math.max( this.masonry.cols, 1 );
};

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