1641166 - vh units size should be affected by minimum scale (or some such?)

Status: NEW

(Core :: Layout, defect, P3)

Description

[Hiroyuki Ikezoe (:hiro)]

Attachment: initial-scale=1 but minimum-scale is smaller than 1.0

Attaching file is an example to see the difference between 100vh and 100% computed values.

On my pixel 3, on Chrome the difference is 143px (note that the initial-scale value is 1.0 and the minimum-scale is 0.39 (the minimum-scale here is not the one in specified in the meta viewport though). If the minimum-scale is 1.0, the difference is 56px on my pixel 3.

So, it looks like the vh height should be "the ICB height + 56 / 0.39" (56 / 0.39 = 143).

But things are not so simple as far as I've tested. In cases where the minimum scale is dynamically changed, it's inconsistent. I am going to two cases where the minimum scale is dynamically changed in different ways.

Comment 1

[Hiroyuki Ikezoe (:hiro)]

Attachment: viewport width is changed from "width=device-width" to "width=1000", thus the minimum-scale is changed from 1.0 to 0.39

In this case, vh units value is also changed in response to the minimum scale change.

Comment 2

[Hiroyuki Ikezoe (:hiro)]

Attachment: the minimum scale is changed from 1.0 to 0.5 because a wide element is added after load

In this case, vh units value is not changed in response to the minimum scale value.

Comment 3

[Botond Ballo [:botond]]

Does the 56px correspond to the dynamic toolbar's height?

Comment 4

[Hiroyuki Ikezoe (:hiro)]

Yes, I think the 56px (in CSS untis at resolution:1.0) is the dynamic toolbar height on pixel 3.