[SideNavMenu]: regression SideNavMenu no longer collapses in isRail mode when SideNav is not expanded

[kevinsperrine]

Package

carbon-components, carbon-components-react

Browser

Chrome

Package version

v10.44.0, v7.44.0

Description

The expected behavior is for the SideNavMenu item to collapse when the SideNav collapses, and it was fixed at one point: https://deploy-preview-3626--carbon-components-react.netlify.app/?path=/story/ui-shell--sidenav-rail, but there has been a regression and it no longer closes. Also visible in the current storybook: https://react.carbondesignsystem.com/?path=/story/components-ui-shell--side-nav-rail

CodeSandbox example

https://codesandbox.io/s/peaceful-pare-fbo9u?file=/src/index.js

Steps to reproduce

Click the a SideNavMenu item to expand it, move mouse after from SideNav to cause it to collapse into rail mode. Extra space is still visible where submenu items are.

Code of Conduct

• I agree to follow this project's Code of Conduct
• I checked the current issues for duplicate problems

[kevinsperrine]

We need to re-open this issue. @dakahn The fix works great in dev, but once the code is minified for production the type name is mangled and the check no longer works. See this deploy preview which includes 7.47.2. It works locally, but fails in the preview.

[kevinsperrine]

I believe related to this issue. Proposed solution: facebook/react#4915 (comment)