![]() ![]() Finally, the step at which the image is to disappear completely will be following the base step, and is calculated by multiplying the base step by 1.5. This step is where the image will be completely shown. An ‘in-between’ step is also needed preceding the base step, and is calculated by dividing the base step percentage by 2. The resulting percentage will be the base step, and where in the animation the image will begin to fade. First, divide slide duration by the total cycle time. Keyframe steps also need to be calculated based on the total number of slides and slide duration. Where the background images for each span of the slideshow are defined, the variable is further used to set the delay for each slide and ensure that a continuous cycle is created. Here, the variable should be multiplied by the total number of slides in the slideshow to set the full length of the cycle. The first instance of the variable is found tied to the spans that define the background images for each slide. This variable will be used to calculate the slideshow’s cycle, and makes adding and removing slides a little more manageable. The slider is responsive and works well on all types of devices. The markup for the slideshow is an unordered list that houses spans which will function as the elements for the background images of the slideshow.Ī variable, $animation-delay, is defined as the duration of each slide. It’s plain, clean and lightweight slider which allows you to easily customization by editing HTML or CSS. Now, all we have to do is include the mixin on our images.Taking advantage of Sass with Bourbon, and refactored the original Codrops demo of a Fullscreen Background Image Slideshow to be a little more compact and efficiently managed. 101 CSS Sliders JCollection of free HTML and CSS slider code examples: card, comparison, fullscreen, responsive, simple, etc. First, I define the CSS keyframes for a fade animation. In this case, I’m doing a 1 second fade-in plus 2 seconds of visibility before fading out. Math: 100 ÷ animation duration = percentage for 1 second. The timing then becomes a multiple of that. If the animation is 6 seconds then each second is 16.66%. If the animation is 10 seconds long then each second is 10%. To do so, we need to break up 100% into the number of seconds of our animation. Therefore, the last piece of the puzzle is figuring out how to get the animation percentages correct. Keyframes can be a simple from or to but for more complicated animations, we have to use percentages. ![]() Math: (fade-in + visible) × (ordinal position − 1) = delay. If it’s the fourth image, the delay is 9 seconds, and so on. If it’s the third image, the delay is 6 seconds. If it’s the second image and the animation should fade in for 1 second and be visible for 2 seconds before fading out then the animation delay should be 3 seconds. Therefore, you want the animation delay to be the fade-in time plus the visible time for the previous image. You just need to ensure that each individual block of content is the same width and height. If your content can live inside a div element, you are good. It could be images, normal HTML content, a combination of things, etc. The key thing is that you want to start the animation for the next image when the image before that is starting its fade-out. First, you have the content that you want to slide: Your content can be anything. The animation delay is pretty straightforward. One of the things you can do with the animation property of CSS is show a series of slides as a slideshow that plays automatically, i.e., it shows one. Math: (fade-in + visible) × images = duration. If you want the image to take 1 second to fade in and be visible for 1 second and you have 3 images then your animation duration is 6 seconds. To determine the animation duration, take the fade in time that you want plus the time you want the image to be visible before beginning to fade out. There are 3 sets of numbers that you need to determine: This graph visualizes how the animation duration and animation delay work. I use an animation-delay to offset the animations for each subsequent image in the slideshow. The basic premise is to have an image fade in and then fade out. I knew I was dealing with certain multiples but kept screwing up the timing. This was trickier than expected because, well, math is hard. ![]() ![]() To do so, I’ll attempt to do this with CSS animations. Pure CSS Slider autoplay, kenburns, prev/next, bullets no js See the Pen Pure CSS Slider autoplay, kenburns, prev/next, bullets no js by Heinz W ( hw ) on CodePen. Yes, this has been done before by other people. Thankfully, I didn’t research this first and just went with it. In continuing my exercise of tackling a simple slideshow in different ways, this challenge attempts to make a slideshow without using any JavaScript. ![]()
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