Target and Release as WebAssembly

[GollyTicker]

For future purposes such as more easily integrating protocurl into other applications (ie. general purpose GUIs, Web workflows or IDEs) it would be beneficial to use WebAssembly with Standard Interface.

Targeting Web Assembly seems to be as simple as using GOOS=js and GOARCH=wasm: Examples

• implementation
• extend tests to also run .wasm archive at least once