Make WASM an opt-in feature

[Razican]

Currently, webassembly is an opt-out feature. While we use it for the web example, I think in the future it will be more common for Boa to be used as a library than as webassembly.

In this scenario, I think it's best to make the feature opt-in, so that we don't need to use default-features = false when loading the crate as a library.

This would mean that we need somehow to be able to select a feature in wasm-pack, or that we need a different crate only exporting boa as wasm, in the workspace, something like boa-wasm.

I would go for this second option, as it also allows us to add #![forbid(unsafe_code)] at the crate level in boa.

What do you think?

[HalidOdat]

This would mean that we need somehow to be able to select a feature in wasm-pack, or that we need a different crate only exporting boa as wasm, in the workspace, something like boa-wasm.

I also think this is a good idea as it would allow us to move the most of the webassembly stuff in that directory, making things more organized.

And not having to specify that the default-features = false is awesome as the default features should be features that every one needs by default.

[jasonwilliams]

Yep agree with the above it should be opt in rather than opt out. We can also move it to a wrapper crate

[muskuloes]

I would like to take this one. But will only be able to work on it from next week, if that's ok.

[Razican]

I would like to take this one. But will only be able to work on it from next week, if that's ok.

Sure, go ahead, let us know when you start! :)

[muskuloes]

I can start now.