Controlling scroll-snap Animation in Svelte and TailwindCSS

Description

Learn why browser-controlled scroll snap animation in Svelte and TailwindCSS can't be customized and what alternatives exist. --- This video is based on the question https://stackoverflow.com/q/79430760/ asked by the user 'Mackie Messer' ( https://stackoverflow.com/u/3022254/ ) and on the answer https://stackoverflow.com/a/79430811/ provided by the user 'brunnerh' ( https://stackoverflow.com/u/546730/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions. Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Is there anyway to control the snap animation using Svelte or TailwindCSS? Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/licensing The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/by-sa/4.0/ ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/by-sa/4.0/ ) license. If anything seems off to you, please feel free to drop me a comment under this video. --- Understanding Scroll Snap and Animation Control When using CSS scroll-snap properties such as snap-y and snap-mandatory (common in TailwindCSS), the browser automatically handles the scrolling and snap animation behavior. This ensures a smooth experience when scrolling through snap points but limits customization. Why You Can't Control Snap Animation Directly The snap animation behavior during scrolling is entirely managed by the browser. CSS provides scroll-behavior: smooth to enable smooth scrolling, but it offers very limited control beyond enabling or disabling smooth behavior. There is no native CSS property or standard JavaScript API to customize the timing, easing, or style of the snap animation itself. Common Misconceptions Svelte Transitions: These affect elements entering or leaving the DOM. They do not control scroll or snap animations. TailwindCSS Utilities: Tailwind provides utilities to enable snapping but does not provide controls for snap animation timing or easing. Alternatives and Workarounds If you want more control over scroll behavior and animations, consider these approaches: Manual Scroll Management: Use JavaScript to handle scrolling between sections with custom easing functions. This bypasses native scroll snapping but requires more code and manual management. Animation Libraries: Use libraries like GSAP to animate scroll positions with full control over duration and easing. Custom Components: Build custom carousel or scroll components that simulate snap behavior with controlled animation. Summary Native scroll snap animations cannot be customized using Svelte or TailwindCSS. Svelte’s transition system does not apply to scroll or snap animations. For custom animations, manual scroll control or animation libraries are the way forward but involve more complexity. In essence, if native scroll snapping suits your needs, it’s best to accept the default animation. Otherwise, prepare to implement your own scrolling logic for fine-grained control.