fix: Empty props on unmount

[martikaljuve]

Hey! Not sure if you are accepting PR-s for single-spa-related projects any more, but I'll just use my fork if not.

I'm using single-spa + single-spa-layout + vite-plugin-single-spa + @wjfe/single-spa-svelte.

I have a single microfrontend that is mounted to the page under two subroutes, with different props passed in each case.

Let's say the microfrontend "mfe1" is mounted as these variants:

// Variant A
{
  name: "mfe1",
  props: {
    mode: "A",
    foo: 100
  }
}

// Variant B
{
  name: "mfe1",
  props: {
    mode: "B",
    bar: "baz"
  }
}

If I follow these steps:

1. mount Variant A
2. unmount Variant A
3. mount Variant B

Then Variant B is passed props like this:

props: {
  mode: "B",
  foo: 100,  // <-- SHOULD NOT BE HERE
  bar: "baz"
}

Getting the foo prop (only defined for Variant A) passed to Variant B is not expected.

I added a test that fails before the fix, and passes after the fix.

[webJose]

Hello. I'm no longer collaborating with the single-spa community. After all, I don't see single-spa doing any kind of advancements or improvements regardless of my history with the single-spa creator.

Having said that, I'm not opposed to merging and deploying so long I don't do the actual coding work. 😎

Since you did the work, I have no issues. I can merge this for you, no problem.

Allow me a day or so to add CI/CD, since I no longer want to do manual package deployments. The WJSoftware org has the CI/CD workflows already created. Just a matter of reusing them.

[webJose]

Shoot, OK. I just saw the workflows are there already. 😁

[webJose]

Published in v1.0.1. Next time, please start by opening an issue as I believe documented issues help other users find what they're looking for.

Cheers!