Add Resource Module

[s0kil]

No description provided.

[s0kil]

Fixes: mint-lang/mint#92

[gdotdesign]

Thank you for this pull request! 👍

I didn't know that we can pre-fetch resources programmatically like this 🙂
I did something similar (normal loading of resources) in the mint-codemirror repository:
https://github.com/mint-lang/mint-codemirror/blob/master/assets/asset-loader.js
https://github.com/mint-lang/mint-codemirror/blob/master/source/AssetLoader.mint

I think it would be nice if we could combine them in some way. I have a few suggestions:

• since we are loading assets and it returns Promise(Never, Void) already, it would make sense to return an actual promise which resolves when the asset is loaded so they could be used in sequence and parallel expressions
• also it would be nice if the possible errors were handled if the requested resource is not found by the server

Let me know what you think 😄

[s0kil]

@gdotdesign That sounds good, I will look into the error handling.
Do you think it should return a promise only when an asset is loaded?
Or also return a promise when an asset is pre-loaded?

[gdotdesign]

I think they should return somethings like Promise(Resource.Error, Void) for all requests (load and pre-load as well), where Resource.Error is an enum of possible errors.

[s0kil]

When preloading resources, there does seem to be a way to catch errors, so far only the onload event works, when a resource is loaded.

For example, let's say you provide a invalid as value to preload, the console gets a warning:
<link rel=preload> must have a valid as value
But onerror never fires, and onload also never fires.

So maybe there could be a bool type: loaded = true | false.
But what would be the timeout of the loaded, since it would never fire if recourse was not loaded?
30-60 seconds seems reasonable.

[gdotdesign]

I think 30 seconds should be fine.

[wooster0]

Suggested change

	Returns an empty Html node. It is useful for example if you dont want to
	Returns an empty Html node. It is useful for example if you don't want to