Why isn't position sticky working

why-isnt-position-sticky-working.js

// Postition sticky won't work if any of that elements ancestors have overflow hidden, auto, or scroll

let parent = document.querySelector('.sticky').parentElement;

while (parent) {
    const hasOverflow = getComputedStyle(parent).overflow;
    if (hasOverflow !== 'visible') {
        console.log(hasOverflow, parent);
    }
    parent = parent.parentElement;
}