Now, our list item will animate when it leaves the DOM. We made sure that we had our key prop, and then we added the exit prop and set it to hidden. We wrapped items in the AnimatePresence component. To recap, we've imported AnimatePresence from Framer Motion.
Now, when the item is removed from the DOM, it will go back to the hidden state, which will be invisible. We're going to set it to hidden, which is our variant label. Exit is what allows the element to actually be removed from the DOM and allow it to be animated. Now that we have our elements wrapped in the AnimatePresence component, we get access to a special prop called exit.
Also, when using AnimatePresence, you want to make sure that you have a key prop on what you're animating. I will wrap it around the items that we want to map over in our list. After AnimatePresence is imported, we're going to wrap it around the item that we want to animate out of the DOM. To use AnimatePresence, we would import AnimatePresence from Framer Motion. In order for us to do this in Framer Motion, we can use the AnimatePresence component. We want the experience to be consistent on how items are removing and adding to the DOM. That's not a good experience for our users. I usually struggled to make basic slideout menus, but those crazy animations are a few lines:Īnim.Instructor: As you can see, if we add a new list item, it animates onto the screen, but when we remove it, it doesn't animate out. Animating a square is always a good starting point for me: If you want to learn it, here’s how I got started using it – just by exploring other people’s creations in CodeSandbox. If you scroll back to the first image, the way the side panel opens up and bounces is created with Framer motion effects. In this example, I used Framer Motion to animate the height of the image because I was already using it in my app for the sidebars, and really find it very intuitive. If you have any questions give me a message on Twitter, and I can try and help. In all, everything depends on the image’s onLoad event. A lot of the wording is directly copied from framer-motion, Copyright (c) 2018. Learn more about Framer motion here.Īnd that’s it, short and sweet(ish). Detailed listing of all animate presence related features of Svelte Motion. Then the next few lines define the animation that will be triggered after the image is loaded. 🚀 Framer Motion animation: in lines 20-30, the image tag has been converted to a Framer motion tag, by adding the motion.When the image is loading, the pulse class is added, creating a shimmer effect – that’s defined in the CSS file. ✨ CSS shimmer effect: on line 17, you’ll see the CSS classes: 'pulse', and 'loadable'.Once the browser has loaded the image, the imageLoaded function is called, which changes the component state, and the image’s CSS class: And entire thing works from the image tag’s onLoad attribute on line 31. The majority of it is React JSX markup – an image tag wrapped with a div element. Each time you press the refresh button (bottom left of sandbox), it’ll load a different image from Unsplash, so you can see how it adapts to differently sized images: CodeSandbox Example All in 40 lines:
I’ve isolated this image lazy-loader into a single React component in CodeSandBox. Creating the Shimmer Effect, and adding (Framer) Motion In hindsight, maybe it would have been possible to calculate the height of the images before they had loaded ( please let me know if you know how!). Lazy loading skeleton imagesĪs shown above, each image starts from a predefined minimum height, and then grows or shrinks depending on the actual image size. 8 comments timscott commented on OS: OSX 10.13.6 Browser Chrome Version.Whilst there are plenty of useful React libraries that can lazy load images, for my use case where the images are stacked in a column, I needed a way to do this with a dynamic height: Your browser does not support the video tag. Public Notifications Fork 581 Star 18.3k Issues 212 Pull requests 6 Discussions Actions Security Insights AnimatePresence - exit not happening 289 Closed timscott opened this issue on 💡 Note: This effect is better for apps rather than images in articles, as changing heights within article content can cause a layout shift. Images in a side menu start off with a loading shimmer effect, and then fluidly grow to their correct height and fade in when loaded: Your browser does not support the video tag. Recently I created a nice lazy-loading image effect for some drag and drop menu items in my app.
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