A month or so ago I gave a presentation on the inner workings of wasm-bindgen to the WebAssembly Community Group. A particular focus was the way that wasm-bindgen is forward-compatible with, and acts as a sort of polyfill for, the host bindings proposal. A lot of this material was originally supposed to appear in my SFHTML5 presentation, but time constraints forced me to cut it out.

Unfortunately, the presentation was not recorded, but you can view the slide deck below, or open it in a new window. Navigate between slides with arrow keys or space bar.

http://fitzgeraldnick.com/2018/12/02/wasm-bindgen-how-does-it-work.html