Re: [css-flexbox] Making percentage margins/padding consistent with Grid

> What are the use-cases for percentage margin/padding? The block approach 
> is
> easier to implement. I agree that flexbox and grid should be consistent
> with each other, but unless we have actual use-cases, I don't see the
> benefit (beyond theoretical purity) of diverging from the block behavior.


The most common use-case I'm aware of is for creating blocks with a specific 
aspect ratio that can still scale to fit the width of their container. For 
example, you set the width to 100%, the height to 0, and padding-top to 75%, 
and your block will fill the width of its container while retaining a 
constant 4:3 aspect ratio.

Obviously this relies on the current block behaviour. I don't know whether 
there are perhaps better ways of accomplishing the same thing with flexbox 
and grid.

Regards
James