Support wasm-pack POST method in rust-playground #1500
Description
rust-lang/rust-playground#374 mention support wasm rendering in rust-playground.
rust-lang/rust-playground#706 is the corresponding implementation
To support such feature in mdBook, we may
- Call their POST method and fetch result (JS and Wasm)
- Render the JS and Wasm in IFrame
- Differentiate the normal rust and wasm code, perhaps support new
wasmclassName