Try Ecsact in the browser

[zaucy]

Since we have wasm support we should be able to give users a little sandbox area for them to try it in the browser.

Our only planned general implementation of the runtime is the Reference Runtime. If we compile that to WebAssembly we should have to problem getting something like monaco embeded in the site to give Ecsact a try.

Ecsact codegen plugins also have a very simple interface and could easily be brought into the browser with Wasm.

To get proper system implementations in the browser AssemblyScript would be a good choice. They already have a sandbox in the browser that we could probably use and customize https://www.assemblyscript.org/

I don't know of any other languages that can compile to WebAssembly right in the browser.