Exception when native submodules of Window present

[colinmccabe]

When:

• A submodule of Window (for example, Window.Foo) is used in an app
• and Window.Foo contains native code (i.e. it has a Native.Window.Foo)
• and Window itself is used nowhere in the app

an exception occurs in Runtime.js: Uncaught TypeError: Cannot read property 'resizeIfNeeded' of undefined

Here are the relevant lines:

https://github.com/elm-lang/core/blob/2.1.0/src/Native/Runtime.js#L423
https://github.com/elm-lang/core/blob/2.1.0/src/Native/Runtime.js#L434

The problem is that elm.Native.Window is defined because of the presence of the native submodule, but elm.Native.Window.values is undefined because the Window module itself is not used in the app. An exception might occur in either of the two if conditions.

I stumbled upon this while writing a library. Any library (or future version of core) that defines a module under Window might encounter this issue.

[jvoigtlaender]

Since there is a pull request addressing this issue, I am closing the issue itself.

[jvoigtlaender]

Since there is a pull request addressing this issue, I am closing the issue itself.