How to correctly set the height of a block without knowing the amount of content of an absolutely positioned child element?

Question

css

There are 2 global blocks one below the other.
There is an absolute positioned object inside the first one and this collapses its height, raising the second block.
How is it correct (and is it possible) to somehow set the height of the first block without knowing the volume of its content with absolute positioning?

Answer 1

For example, using JS, get the height and set it to the parent