aspectRatio + undefined width/height

[santiph]

Environment

React Native Environment Info:
    System:
      OS: Linux 4.15 Ubuntu 18.04.1 LTS (Bionic Beaver)
      CPU: (12) x64 AMD Ryzen 5 2600X Six-Core Processor
      Memory: 15.10 GB / 31.34 GB
      Shell: 2.7.1 - /usr/bin/fish
    Binaries:
      Node: 8.10.0 - /usr/bin/node
      npm: 3.5.2 - /usr/bin/npm
    npmPackages:
      react: 16.6.3 => 16.6.3 
      react-native: 0.57.8 => 0.57.8 
    npmGlobalPackages:
      react-native-cli: 2.0.1
      react-native-git-upgrade: 0.2.7

Description

aspectRatio and height: 100% seem to work only when width is set to undefined, but with aspectRatio and width set, then height is not required at all. (See Demo)
Why is that?

Reproducible Demo

Working fine:

aspectRatio: 1,
width: '100%',

aspectRatio: 1,
height: '100%',
width: undefined,

[rickhanlonii]

Hey @santiph thanks for filing

If I understand correctly, this is the way aspectRatio is designed to work since aspectRatio controls the size of the unset dimension. If I'm misunderstanding, can you provide a snack or repro that demonstrates?