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Infinite Photo Grid is a fluid and responsive gallery featuring a lightbox effect.

HTML5 Gallery / Banner includes 16 different transitions including the popular Ken Burns effect.

Horizontal Gridfolio Pro is a fully responsive grid plugin.

HTML5 Carousel is an HTML5 version of the popular 3D carousel effect made famous by Flash sites.

HTML5 Coverflow is an HTML5 version of Apple’s famous coverflow design.

Royal 3D Carousel is just like HTML5 Coverflow, but with even more 3D impact.

HTML5 Flow Responsive Slider is the perfect image gallery for photographers who love minimalism, a great responsive solution.

HTML5 Gallery / Banner with Buttons has all the great transitions of the HTML5 Gallery / Banner, but this time, you guessed it, with buttons; great for when you want your users to be active in selecting images.

Easy 360˚ Product Viewer is a brilliant solution for displaying 360 degree shots of your products across desktop and mobile devices.

HTML5 Photo Gallery – Resizable Album Grid XML is a resizable grid, perfect for showing off your whole collection of images at once.

HTML5 Random Gallery Slideshow uses hardware acceleration to produce superb performance on both desktops and mobile devices.

Responsive Slider Gallery is a responsive gallery perfect for mobile, it can even be embedded in WordPress.

HTML5 Zoomer Plugin FWD is a great image navigator for browsing oversized images on a web page.

Megazoom Image Viewer is an image viewer for very large images, great for panning maps, high-res product shots and diagrams.

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Responsive Slideshow Photo Gallery Grid is a flexible and responsive grid, using vanilla JavaScript and no dependencies.

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Have you used any of FWD’s HTML5 galleries? Which is your favourite? Let us know in the comments.

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Fitness bands, watches, smoke detectors: what will be put online next?

By Rachel Metz

In Sass, the ampersand (&) symbol is used to reference the parent selector in a nested rule. For example, the following targets .btn on :hover:

.btn {
      ...
      &:hover {
        background: dodgerblue;
      }
    }

The & can also be placed after a selector to reverse the nesting order:

.btn {
      ...
      .navbar & {
        background: lightsteelblue;
      }
    }

This outputs a descendant selector that targets a .btn element inside .navbar:

.btn {
      ...
    }
    .navbar .btn {
      background: lightsteelblue;
    }

We can take this concept a step further with an adjacent sibling combinator.

Adjacent Sibling Selector

The adjacent sibling combinator (+) is used to target an element’s immediate sibling. For instance:

.heading + .intro {
      ...
    }

This targets any intro class immediately following an element with the class heading. Let’s take a look at two useful ways we can use this combinator with the & selector.

Adjacent Buttons

Let’s say we have a button group consisting of a primary and a secondary action button, both have the class btn.

<div class="btn-group">
      <a class="btn" href="#">Primary Action</a>
      <a class="btn" href="#">Secondary Action</a>
    </div>

The secondary action button needs to be a different color and have a left margin to separate it from its sibling. We can use the following rule to reference btn, then target its immediate sibling with the same class:

.btn {
      ...
      & + & {
        margin-left: 15px;
        background: firebrick;
      }
    }

If two btn classes are adjacent siblings, the second one will get the firebrick background and left margin. Here’s the CSS output:

.btn {
      ...
    }
    .btn + .btn {
      margin-left: 15px;
      background: firebrick;
    }

See CodePen Demo

Columns

The adjacent & selector also helps with column layout. To create a row where all but the first column have a left margin (or gutter), we can write the following:

.col {
      ...
      & + & {
        margin-left: 30px;
      }
    }

The first column will remain flush with the left side of the page, while the others get a roomy left margin.

See CodePen Demo

As we just learned, the “double ampersand” sibling selector is a handy solution that keeps us from writing extra CSS and classes in our markup. Methods like these are some of the many ways Sass helps us write cleaner, more efficient front-end code.

To learn more about Sass, check out our new Treehouse course on Sass basics.

The post Sass Tip: The Double Ampersand Selector appeared first on Treehouse Blog.