Question for shared function instance between host app and remote app.

[jwq403926021]

Describe the bug

Why is the mitt() instance not singleton ??

Here is the shared function instance code. This code is shared by host app.

Here is the host federation config.

Here is the usage from host app. Using the instance directly.

Here is the usage from remote app. Using the instance by shared module.

Reproduction

reproduction

Used Package Manager

pnpm

System Info

System:
    OS: Windows 11 10.0.22631
    CPU: (16) x64 12th Gen Intel(R) Core(TM) i5-1240P
    Memory: 886.59 MB / 15.68 GB
  Binaries:
    Node: 18.20.4 - C:\Program Files\nodejs\node.EXE
    npm: 10.7.0 - C:\Program Files\nodejs\npm.CMD
    pnpm: 9.14.2 - C:\Program Files\nodejs\pnpm.CMD
  Browsers:
    Edge: Chromium (130.0.2849.56)
    Internet Explorer: 11.0.22621.3527

Validations

• [x] Read the docs.
• [X] Read the common issues list.
• [X] Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• [X] Make sure this is a Module federation issue and not a framework-specific issue.
• [X] The provided reproduction is a minimal reproducible example of the bug.

[ScriptedAlchemy]

exposed modules are not guarenteed to be singleton, the host and remote have seperate runtime containers and module graphs. only mitt would be singleton, the exposed item would not be in this case, youd need a runtime chunk single but that may cause other issues unless you have an additional ContainerPlugin with runtime: false set on it so that you have one for when the hosts own remote is loaded into the page, and another for if the host is not the same app as a remote being loaded. the exposed thing is not singleton, but its import of mitt is.

if you shared the thing you expose, it would probbably work