I'm not sure what is going on here, but without adding anything to my lib.rs to reference any of this code, simply adding the 2.0.0-beta to my TOML and attempting to wasm-pack it fails. 

It seems clear that some dependany might not be configured for wasm32-unknown-unknown because of a "Unsupported target OS!" error. 

The rest is extremely confusing, I keep reading examples of how to implement mongo in rust, but this and/or other early versions of the crates just throw errors.

Is none of this designed to support WASM? I would love to be able to directly connect to a mongodb instance from WASM so that I can move forward with my project. 

I apologize if this isn't the appropriate place for this, I'm at my wits end trying to figure out how to get past square one with this and the examples all use main() and don't seem to be configured to run with bind-gen. 

Below are the wasm-pack errors I'm getting simply adding your package.

[INFO]: Checking for the Wasm target...
[INFO]: Compiling to Wasm...
Compiling socket2 v0.4.0
Compiling hostname v0.3.1
Compiling generic-array v0.14.4
Compiling futures-macro v0.3.15
Compiling tokio v1.6.0
Compiling futures-util v0.3.15
Compiling crossbeam-utils v0.8.4
Compiling indexmap v1.6.2
Compiling parking_lot_core v0.8.3
Compiling ahash v0.7.3
Compiling futures-core v0.3.15
Compiling memchr v2.4.0
error: Unsupported target OS! Create an issue: https://github.com/svartalf/hostname/issues/new
--> C:\Users\Trevor\.cargo\registry\src\github.com-1ecc6299db9ec823\hostname-0.3.1\src\lib.rs:81:9

81 | compile_error!("Unsupported target OS! Create an issue: https://github.com/svartalf/hostname/issues/new");

error[E0433]: failed to resolve: use of undeclared crate or module `sys`
--> C:\Users\Trevor\.cargo\registry\src\github.com-1ecc6299db9ec823\hostname-0.3.1\src\lib.rs:105:5

105 | sys::get()

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0433`.
error: could not compile `hostname`

To learn more, run the command again with --verbose.
warning: build failed, waiting for other jobs to finish...
error[E0432]: unresolved import `crate::sys`
--> C:\Users\Trevor\.cargo\registry\src\github.com-1ecc6299db9ec823\socket2-0.4.0\src\sockaddr.rs:5:12

5 | use crate::sys::

{ | ^^^ | | | unresolved import | help: a similar path exists: `crate::socket::io::sys` error[E0432]: unresolved imports `crate::sys`, `crate::sys` --> C:\Users\Trevor\.cargo\registry\src\github.com-1ecc6299db9ec823\socket2-0.4.0\src\socket.rs:21:12 | 21 | use crate::sys::\{self, c_int, getsockopt, setsockopt, Bool}

;

error[E0432]: unresolved import `sys`
--> C:\Users\Trevor\.cargo\registry\src\github.com-1ecc6299db9ec823\socket2-0.4.0\src\lib.rs:129:5

129 | use sys::c_int;

error[E0433]: failed to resolve: unresolved import
--> C:\Users\Trevor\.cargo\registry\src\github.com-1ecc6299db9ec823\socket2-0.4.0\src\sockaddr.rs:114:29

114 | let ip = crate::sys::from_in_addr(addr.sin_addr);

error[E0433]: failed to resolve: unresolved import
--> C:\Users\Trevor\.cargo\registry\src\github.com-1ecc6299db9ec823\socket2-0.4.0\src\sockaddr.rs:121:29

121 | let ip = crate::sys::from_in6_addr(addr.sin6_addr);

error[E0433]: failed to resolve: unresolved import
--> C:\Users\Trevor\.cargo\registry\src\github.com-1ecc6299db9ec823\socket2-0.4.0\src\sockaddr.rs:172:30

172 | sin_addr: crate::sys::to_in_addr(&addr.ip()),

error[E0433]: failed to resolve: unresolved import
--> C:\Users\Trevor\.cargo\registry\src\github.com-1ecc6299db9ec823\socket2-0.4.0\src\sockaddr.rs:207:31

207 | sin6_addr: crate::sys::to_in6_addr(addr.ip()),

error[E0433]: failed to resolve: use of undeclared crate or module `sys`
--> C:\Users\Trevor\.cargo\registry\src\github.com-1ecc6299db9ec823\socket2-0.4.0\src\lib.rs:149:37

149 | pub const IPV4: Domain = Domain(sys::AF_INET);

error[E0433]: failed to resolve: use of undeclared crate or module `sys`
--> C:\Users\Trevor\.cargo\registry\src\github.com-1ecc6299db9ec823\socket2-0.4.0\src\lib.rs:152:37

152 | pub const IPV6: Domain = Domain(sys::AF_INET6);

error[E0433]: failed to resolve: use of undeclared crate or module `sys`
--> C:\Users\Trevor\.cargo\registry\src\github.com-1ecc6299db9ec823\socket2-0.4.0\src\lib.rs:191:35

191 | pub const STREAM: Type = Type(sys::SOCK_STREAM);

error[E0433]: failed to resolve: use of undeclared crate or module `sys`
--> C:\Users\Trevor\.cargo\registry\src\github.com-1ecc6299db9ec823\socket2-0.4.0\src\lib.rs:196:34

196 | pub const DGRAM: Type = Type(sys::SOCK_DGRAM);

error[E0433]: failed to resolve: use of undeclared crate or module `sys`
--> C:\Users\Trevor\.cargo\registry\src\github.com-1ecc6299db9ec823\socket2-0.4.0\src\lib.rs:200:38

200 | pub const SEQPACKET: Type = Type(sys::SOCK_SEQPACKET);

error[E0433]: failed to resolve: use of undeclared crate or module `sys`
--> C:\Users\Trevor\.cargo\registry\src\github.com-1ecc6299db9ec823\socket2-0.4.0\src\lib.rs:204:32

204 | pub const RAW: Type = Type(sys::SOCK_RAW);

error[E0433]: failed to resolve: use of undeclared crate or module `sys`
--> C:\Users\Trevor\.cargo\registry\src\github.com-1ecc6299db9ec823\socket2-0.4.0\src\lib.rs:231:43

231 | pub const ICMPV4: Protocol = Protocol(sys::IPPROTO_ICMP);

error[E0433]: failed to resolve: use of undeclared crate or module `sys`
--> C:\Users\Trevor\.cargo\registry\src\github.com-1ecc6299db9ec823\socket2-0.4.0\src\lib.rs:234:43

234 | pub const ICMPV6: Protocol = Protocol(sys::IPPROTO_ICMPV6);

error[E0433]: failed to resolve: use of undeclared crate or module `sys`
--> C:\Users\Trevor\.cargo\registry\src\github.com-1ecc6299db9ec823\socket2-0.4.0\src\lib.rs:237:40

237 | pub const TCP: Protocol = Protocol(sys::IPPROTO_TCP);

error[E0433]: failed to resolve: use of undeclared crate or module `sys`
--> C:\Users\Trevor\.cargo\registry\src\github.com-1ecc6299db9ec823\socket2-0.4.0\src\lib.rs:240:40

240 | pub const UDP: Protocol = Protocol(sys::IPPROTO_UDP);

error[E0433]: failed to resolve: use of undeclared crate or module `sys`
--> C:\Users\Trevor\.cargo\registry\src\github.com-1ecc6299db9ec823\socket2-0.4.0\src\lib.rs:272:18

272 | self.0 & sys::MSG_TRUNC != 0

error[E0433]: failed to resolve: use of undeclared crate or module `sys`
--> C:\Users\Trevor\.cargo\registry\src\github.com-1ecc6299db9ec823\socket2-0.4.0\src\lib.rs:280:33

280 | pub struct MaybeUninitSlice<'a>(sys::MaybeUninitSlice<'a>);

error[E0433]: failed to resolve: use of undeclared crate or module `sys`
--> C:\Users\Trevor\.cargo\registry\src\github.com-1ecc6299db9ec823\socket2-0.4.0\src\lib.rs:299:31

299 | MaybeUninitSlice(sys::MaybeUninitSlice::new(buf))

help: consider importing this struct

62 | use crate::socket::MaybeUninitSlice;

error[E0308]: mismatched types
--> C:\Users\Trevor\.cargo\registry\src\github.com-1ecc6299db9ec823\socket2-0.4.0\src\socket.rs:1451:23

1451 | from!(net::TcpStream, Socket);

::: C:\Users\Trevor\.cargo\registry\src\github.com-1ecc6299db9ec823\socket2-0.4.0\src\lib.rs:104:16

104 | fn from(socket: $from) -> $for {

error[E0308]: mismatched types
--> C:\Users\Trevor\.cargo\registry\src\github.com-1ecc6299db9ec823\socket2-0.4.0\src\socket.rs:1452:25

1452 | from!(net::TcpListener, Socket);

::: C:\Users\Trevor\.cargo\registry\src\github.com-1ecc6299db9ec823\socket2-0.4.0\src\lib.rs:104:16

104 | fn from(socket: $from) -> $for {

error[E0308]: mismatched types
--> C:\Users\Trevor\.cargo\registry\src\github.com-1ecc6299db9ec823\socket2-0.4.0\src\socket.rs:1453:23

1453 | from!(net::UdpSocket, Socket);

::: C:\Users\Trevor\.cargo\registry\src\github.com-1ecc6299db9ec823\socket2-0.4.0\src\lib.rs:104:16

104 | fn from(socket: $from) -> $for {

error[E0308]: mismatched types
--> C:\Users\Trevor\.cargo\registry\src\github.com-1ecc6299db9ec823\socket2-0.4.0\src\socket.rs:1454:15

1454 | from!(Socket, net::TcpStream);

::: C:\Users\Trevor\.cargo\registry\src\github.com-1ecc6299db9ec823\socket2-0.4.0\src\lib.rs:104:16

104 | fn from(socket: $from) -> $for {

error[E0308]: mismatched types
--> C:\Users\Trevor\.cargo\registry\src\github.com-1ecc6299db9ec823\socket2-0.4.0\src\socket.rs:1455:15

1455 | from!(Socket, net::TcpListener);

::: C:\Users\Trevor\.cargo\registry\src\github.com-1ecc6299db9ec823\socket2-0.4.0\src\lib.rs:104:16

104 | fn from(socket: $from) -> $for {

error[E0308]: mismatched types
--> C:\Users\Trevor\.cargo\registry\src\github.com-1ecc6299db9ec823\socket2-0.4.0\src\socket.rs:1456:15

1456 | from!(Socket, net::UdpSocket);

::: C:\Users\Trevor\.cargo\registry\src\github.com-1ecc6299db9ec823\socket2-0.4.0\src\lib.rs:104:16

104 | fn from(socket: $from) -> $for {

error[E0061]: this function takes 4 arguments but 3 arguments were supplied
--> C:\Users\Trevor\.cargo\registry\src\github.com-1ecc6299db9ec823\socket2-0.4.0\src\sockaddr.rs:123:33

123 | Some(SocketAddr::V6(SocketAddrV6::new(

note: associated function defined here
--> C:\Users\Trevor\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib/rustlib/src/rust\library/std/src/net/addr.rs:359:12

359 | pub fn new(ip: Ipv6Addr, port: u16, flowinfo: u32, scope_id: u32) -> SocketAddrV6 {

error: aborting due to 27 previous errors

Some errors have detailed explanations: E0061, E0308, E0432, E0433.
For more information about an error, try `rustc --explain E0061`.
error: build failed
Error: Compiling your crate to WebAssembly failed