css - Using auto in CSS calc

Question

I searched a lot but I didn't find a good resource.

I want to calculate a div height as its contents plus a fix size. I tested calc(auto+50px) but unfortunately It doesn't work (the browser does not interpret it as valid code).

Answer 1

这会产生预期的结果吗？

div {
    height: auto;
    padding-bottom: 50px;
}