[willybrauner]

Thanks a lot! The left column containing the text is sticky, The right column is absolute and translate on Y and depend on an intersection observer triggered by each scroll section from the left.

[cloogshicer]

Super cool, thanks for explaining! Is the code available somewhere?

[willybrauner]

No, unfortunately, my website is not open source. I may consider externalizing the blog in the future, while keeping all the internal article modules.