Have you or the PO. ever scrolled through a long list on a mobile app and wished for a quick way back to the top? In this article, I’ll walk you through creating a sleek “Back to Top” button in Flutter that slides out from the left side of the screen as you scroll down, then gracefully slides back in when you’re near the top. This project is a practical demo of enhancing user experience with animations and scroll handling.
The Idea
Inspired by common UI patterns, this Flutter app features a yellow FloatingActionButton with an upward arrow that activates after scrolling 200 pixels. Using AnimatedSlide and a ScrollController, the button animates smoothly, offering a tap-to-top functionality with a 400ms ease-out effect.
How It Works
Scroll Detection: The button appears when the scroll offset exceeds 200 pixels and hides when back within that threshold.
Animation: The slide-out effect uses Offset(1.0, 0) to move off-screen to the right, reverting to Offset(0, 0) when visible.
Customization: Adjust colors, thresholds, or animation curves to fit your design.
Getting Started
Clone the repo, run flutter pub get, and launch with flutter run. Check out the GitHub repository for the full code!
Why It Matters
This solution improves navigation in long-scrolling interfaces, a must for apps with extensive content. Plus, it’s a fun way to explore Flutter’s animation capabilities.
Ready to implement this in your project? Dive into the code and let me know your tweaks in the comments! Follow me for more Flutter tips and tricks.
More challenges to work on
Try not to use FAB in case you need it for a create or refresh button. (Althought you can make a multi purpose FAB but a sliding back to top feature may sound more attractive)
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