Flexcol.Mosaic.js

It's a tiny (just 1.2kB) Javascript library to enable mosaic grid in multiple columns with dynamic height detection.

How it works?

This plugin uses CSS flexbox for setting items in columns. The JavaScript part is responsible for dynamically setting the height of a container according to desired number of columns.

How to use it?

CSS

At first you have to add some CSS rules to your stylesheet:

.flexcol-container {
    box-sizing: border-box;
    display: -webkit-flex;
    display: -ms-flexbox;
    display: flex;
    -webkit-flex-direction: column;
        -ms-flex-direction: column;
            flex-direction: column;
    -webkit-flex-wrap: wrap;
        -ms-flex-wrap: wrap;
            flex-wrap: wrap;
}

.flexcol-item {
    box-sizing: border-box;
    // the value - 1rem - is a sum of left and right margin of the element
    width: calc((100% / 3) - 1rem);
    padding: 1rem;
    margin: 0 .5rem 1rem;
    background: #eee;
}

As you can see there are 2 rules. The most important rule to make desirent amount of columns in the container is .flexcol-item. It's very important to set correct width of elements. You have to follow the rule:

• if you want to have 2 columns, then you have to set width like this:

width: calc(50% - 1rem);

• if you want to have 3 columns, then you have to set width like this:

width: calc((100% / 3) - 1rem);

• etc.

JavaScript

Just add a link to the flexcol.mosaic.js or flexcol.mosaic.min.js scripts in your HTML file, just like this:

<script src="js/flexcol.mosaic.js"></script>

Then, just call the library the following way:

new FlexcolMosaic();

And that's it! It's working now.

Options

There is a bunch of options you can provide to the plugin instance:

columns {Integer}

The number of columns visible in the container.

Default value - 2.

containerSelector {String}

The CSS selector used to find a container of items that should be displayed in columns.

Default value - '.flexcol-container'.

itemSelector {String}

The CSS selector used to find items in the container.

Default value - '.flexcol-item'.

Methods

The plugin instance has only one method provided to end developer.

setColumns (columnsNumber)

The method takes a columns number as a parameter. The type of param should be an integer. When set, it updates the elements container to allow items to be aligned in desired number of columns.