Set elements height to follow sibling height in display flex row [duplicate] - html

Question

This question already has answers here:
How can you set the height of an outer div to always be equal to a particular inner div?
(2 answers)
Closed 2 years ago.
I have the following structure in my project:
<div class="container">
<div class="super-child">
<div class="uneditable">
<div class="A"><div>
</div>
<div class="uneditable">
<div class="B"></div>
</div>
</div>
...
</div>
I have the following restrictions with this structure:
container class must be display flex and be on column mode
super-child class must be display flex and be on row mode
uneditable class does cannot receive any styling at all, only that they have height and width 100%
What i'm trying to do is style this structure so that class A has a dominating height of over B, that is, if A height grows, B will have more height to match A's, if A is smaller, B will have the same height as A's
I've tried to set grow and shrink values in the class A and B. I can also change the displays to grid, but in my case is not preferred to.
Is there a way to make this dependence of height without using javascript to style the elements?
[UPDATE]
Found the answer to my question here. The solution was to use the following style for all children of super-child, except the first.
height: 0;
min-height: 100%;
This works due the fact that this conjunction of height definition can be understood as "have no height, just expand enough not pushing the boundaries"

Answer 1

... I would use grid for this, not flex and pay attention to the closing tag too :) , flex will require a bit of js to update heights :
example in a column since in a row should not be an issue
.super-child {
display: grid;
grid-auto-rows: 1fr;
}
.super-child > .uneditable {
border: solid;
}
<div class="container">
<div class="super-child">
<div class="uneditable">
<div class="A">A <br> AA</div>
</div>
<div class="uneditable">
<div class="B"> B</div>
</div>
</div>
</div>
<hr>
<div class="container">
<div class="super-child">
<div class="uneditable">
<div class="A">A </div>
</div>
<div class="uneditable">
<div class="B"> B<br> BB</div>
</div>
</div>
</div>
... side by side :
.super-child {
display: flex;
}
.super-child > .uneditable {
border: solid;
flex:1;
/* demo purpose to resize heights */
overflow-y:scroll;
resize:vertical
}
<div class="container">
<div class="super-child">
<div class="uneditable">
<div class="A">A <br> AA</div>
</div>
<div class="uneditable">
<div class="B"> B</div>
</div>
</div>
</div>
<hr>
<div class="container">
<div class="super-child">
<div class="uneditable">
<div class="A">A </div>
</div>
<div class="uneditable">
<div class="B"> B<br> BB</div>
</div>
</div>
</div>