WebAssembly support

[orhun]

bson is failing to build for wasm*-unknown-unknown target due to the hard dependency on rand crate defined here:

bson-rust/Cargo.toml

Line 61 in 16084d9

rand = "0.8"

I'm getting this error while trying to serve a WebAssembly application via trunk:

error: the wasm*-unknown-unknown targets are not supported by default, you may need to enable the "js" feature. For more information see: https://d
ocs.rs/getrandom/#webassembly-support
   --> /home/orhun/.cargo/registry/src/index.crates.io-6f17d22bba15001f/getrandom-0.2.15/src/lib.rs:342:9
    |
342 | /         compile_error!("the wasm*-unknown-unknown targets are not supported by \
343 | |                         default, you may need to enable the \"js\" feature. \
344 | |                         For more information see: \
345 | |                         https://docs.rs/getrandom/#webassembly-support");
    | |________________________________________________________________________^

Thanks for your work and I'm hoping to get this fixed!

[isabelatkinson]

Hey @orhun, thanks for opening this issue! The page linked in the compiler error you received suggests adding the following to your Cargo.toml:

[dependencies]
getrandom = { version = "0.2", features = ["js"] }

It also mentions:

This can be done even if getrandom is not a direct dependency. Cargo allows crates to enable features for indirect dependencies.

Does adding this additional dependency resolve the issue for you?

[orhun]

This can be done even if getrandom is not a direct dependency. Cargo allows crates to enable features for indirect dependencies.

Oh wow, I obviously missed that! Thanks for the pointer, looks good now :)