The more the user scrolls, the less opaque the element should become. The action in this case is updating the opacity of the element. Image Gallery With Horizontal Scroll Use the horizontal scrollbar to see the other images: Try it Yourself ยป Create an Image Gallery with Horizontal Scroll Step 1) Add HTML: ExampleWhen a user scrolls, the scroll event is fired. In this video I'll show you how to create this cool Fade In and Fade Out animation effect using HTML, CSS and JavaScript. To make the effect, we need the trigger and action. Looking for a different effect? Maybe you want to use a CSS transition or animation on scroll. As you want the scrollbar to fade in and out with a transition, youll have to use an element that covers it and animate its opacity. See the Pen Element fade out on scroll (demo) by Nick Ciliak ( on CodePen. By the time the element exits the viewport, it has completely faded out. It works like this: as the user scrolls down the page, when the given element reaches the top of the viewport, it begins to fade out depending on how much the user has scrolled. The top value represents how far the top of the. button from within header and give it a class of fade-in. Fading an element out on scroll is a subtle effect that helps draw attention away from what is exiting the viewport and towards whatever is below. If midFoldRect 's top value is equal or less than zero, then find the element with class.
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