Size

window.innerWidth: (include scrollbar)

document.documentElement.clientWidth:

document.body.clientWidth: (not include scrollbar)

show this element when window.innerWidth >= 640

Because tailwind use default box-sizing:border-box; not content-box, So width, padding and border are mixed

relative div

overflow-x-auto div with textXl

absolute div

Left-0

Right-0

bottom-0

bottom-0 Right-0

Left-0

Right-0

bottom-0

bottom-0 Right-0