for thoses of us that don't remember that particular Show HN it's not very clear...

for thoses of us that don't remember that particular Show HN it's not very clear what this does. Maybe a video or a screenshot?

https://c2-dhz.pages.dev/ seems to be the demo site but it crash for me as soon as I start scrolling

    Uncaught Error: Cache too big!
    findObject https://c2-dhz.pages.dev/assets/index-8fcc41ea.js:10
    howManyCharactersFit https://c2-dhz.pages.dev/assets/index-8fcc41ea.js:10
    drawText https://c2-dhz.pages.dev/assets/index-8fcc41ea.js:10
    endTextDelayedDraw https://c2-dhz.pages.dev/assets/index-8fcc41ea.js:10
    paintCalendarDateObjects https://c2-dhz.pages.dev/assets/index-8fcc41ea.js:10
    redrawCore https://c2-dhz.pages.dev/assets/index-8fcc41ea.js:10
    redrawCore https://c2-dhz.pages.dev/assets/index-8fcc41ea.js:10
    redrawCore https://c2-dhz.pages.dev/assets/index-8fcc41ea.js:10
    redrawCore https://c2-dhz.pages.dev/assets/index-8fcc41ea.js:10
    redrawCore https://c2-dhz.pages.dev/assets/index-8fcc41ea.js:10
    redrawCore https://c2-dhz.pages.dev/assets/index-8fcc41ea.js:10
    redrawCore https://c2-dhz.pages.dev/assets/index-8fcc41ea.js:10
    redrawCore https://c2-dhz.pages.dev/assets/index-8fcc41ea.js:10
    redrawCore https://c2-dhz.pages.dev/assets/index-8fcc41ea.js:10
    redrawCore https://c2-dhz.pages.dev/assets/index-8fcc41ea.js:10
    redrawCore https://c2-dhz.pages.dev/assets/index-8fcc41ea.js:10
    redrawCore https://c2-dhz.pages.dev/assets/index-8fcc41ea.js:10
    redrawCore https://c2-dhz.pages.dev/assets/index-8fcc41ea.js:10
    redrawCore https://c2-dhz.pages.dev/assets/index-8fcc41ea.js:10
    redrawCore https://c2-dhz.pages.dev/assets/index-8fcc41ea.js:10
    redrawCore https://c2-dhz.pages.dev/assets/index-8fcc41ea.js:10
    redrawCore https://c2-dhz.pages.dev/assets/index-8fcc41ea.js:10
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    redrawCore https://c2-dhz.pages.dev/assets/index-8fcc41ea.js:10
    redrawCore https://c2-dhz.pages.dev/assets/index-8fcc41ea.js:10
    redrawCore https://c2-dhz.pages.dev/assets/index-8fcc41ea.js:10
    redrawCore https://c2-dhz.pages.dev/assets/index-8fcc41ea.js:10
    redrawCore https://c2-dhz.pages.dev/assets/index-8fcc41ea.js:10
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    redrawCore https://c2-dhz.pages.dev/assets/index-8fcc41ea.js:10
    redrawCore https://c2-dhz.pages.dev/assets/index-8fcc41ea.js:10
    redrawCore https://c2-dhz.pages.dev/assets/index-8fcc41ea.js:10
    redrawCore https://c2-dhz.pages.dev/assets/index-8fcc41ea.js:10
    index-8fcc41ea.js:10:242273