How can I convert px to vw in JavaScript?

Question

I want to convert px to vw in JavaScript, how can I do it?

I've been looking for it, but I haven't found anything.

So,

1px → ? vw

Thanks.

Answer 1

1px = (100vw / [document.documentElement.clientWidth] px)

e.g. — If your viewport was 500px wide (equals by definition to 100vw) then

1px = (100vw / 500px) = 0.2vw

I used .clientWidth to exclude any scrollbar from computation