Fader

<!-- Offset (in pixels) using "data-offset" attribute -->
<div class="fade-default" data-offset="200">
	<img src="images/image.jpg" alt="">
</div>

var fader = new Fader();

// Animation classes must start with "fade-"
.fade-default {
	opacity: 0;
	transition: opacity 1s ease-out;

	&.fade-in {
		opacity: 1;
	}
}