javascript - How is the size determined during react-native layout?

Question

I saw that the official website only says that the unit is not used, but the logical pixel unit is used.
So for example, width: 20; How to determine the 20 here?
When I was making a small program before, the documentation of the small program stated that it was done using the 750 design drawings, but rn seemed to have no instructions in this regard

Answer 1

react-native uses pt as the unit, which is equivalent to a little more than half of the same px. You need to debug it slowly by yourself