[Examples] Add WebRTC DataChannel example (#2131)

* Add WebRTC DataChannel example

* Add guide

* Fix format

* Use webpack to build example
This commit is contained in:
Yuji Sugiura
2020-05-13 04:00:33 +09:00
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# WebRTC DataChannel Example
[View full source code][code] or [view the compiled example online][online]
[online]: https://rustwasm.github.io/wasm-bindgen/exbuild/webrtc_datachannel/
[code]: https://github.com/rustwasm/wasm-bindgen/tree/master/examples/webrtc_datachannel/
This example creates 2 peer connections and 2 data channels in single browser tab.
Send ping/pong between `peer1.dc` and `peer2.dc`.
## `Cargo.toml`
The `Cargo.toml` enables features necessary to use WebRTC DataChannel and its negotiation.
```toml
{{#include ../../../examples/webrtc_datachannel/Cargo.toml}}
```
## `src/lib.rs`
The Rust code connects WebRTC data channel.
```rust
{{#include ../../../examples/webrtc_datachannel/src/lib.rs}}
```