Added preloadWeak static method

[edongashi]

Added preloadWeak which attempts to resolve and hoist the wrapped component synchronously. This is useful when reading or writing data from/to static properties before initial render.

I'm not sure if this implementation is correct, but I think with the description given in #119 you can understand what the desired behavior is.
Thanks.

PS The name or method of invoking this doesn't matter, you can add an optional parameter to preload or add a preload.sync or whatever.

[ScriptedAlchemy]

Code looks good to me but I’d appreciate a updated test for this scenario if possible

[ScriptedAlchemy]

Can you also add an example to the readme? It would be good to write this isecase down

[edongashi]

HI, I added some clarification in this section.

Is this sufficient? Or should I create a separate section for the method?

About tests: I need to do some research because I am unfamiliar with react/jest testing. I will update as soon as I get the chance to figure it out. Thanks

[ScriptedAlchemy]

Yea that’s perfect!

If a test can be created - I’m not sure what we have in there.

I’m approving this in the mean time.

[edongashi]

This is basically preload() but without the async fetching. I copied the preload code and removed parts that initiate async requests. I'll probably check the existing tests on preload() and adapt them for this simpler use case.

The desired behavior was to be able to read static properties before rendering. The scenario that inspired this:

SERVER:

const UniversalComponent = universal(... something)

// sometime later

const initialProps = await UniversalComponent.getInitialProps()
renderToDomString(
  <UniversalComponent {...initialProps} />
)

This woulnd't work because UniversalComponent has never rendered, hence static properties were not hoisted. In order to hoist staitcs I had to render it before (same with client). Which made it impossible to access statics before rendering. onAfter is called mid render-cycle which was not ideal for state management.