Need help with jaspr_lenis (Jaspr dart Port of the Lenis Smooth-Scrolling Library)

[YashMakan]

Hi everyone,

I'm working on porting the popular smooth-scrolling library, Lenis, to Dart for use with Jaspr. I'm relatively new to web development and the intricacies of browser event loops, and I've hit a persistent "glitch" that I'm struggling to solve.

I used LLM for the initial porting of the TypeScript source code to Dart. The port is functionally complete and almost works perfectly, but there's a subtle yet noticeable stutter/glitch during scrolling that isn't present in the original JavaScript version.

You can see a recording of the glitch here:
https://github.com/user-attachments/assets/32cd5bc2-a40b-48f1-a7a9-b5027b4a2b35

What I've Done So Far:

I've created a minimal reproducible example with the ported library. You can find the complete source code for the library and the example usage here:
https://github.com/YashMakan/jaspr_lenis
https://github.com/YashMakan/jaspr_lenis/tree/main/example

My Question:

Could anyone with more web/Jaspr/lenis experience take a look at the provided code and logs and offer some insight into what might be causing this persistent glitch? I feel like I'm 99% of the way there, but this last 1% is proving to be incredibly difficult.

Any guidance, advice, or pointers is appreciated.

[schultek]

You can also ask this on discord, I think more people are active there.