Is there anywhere a "hello world" or simple DOM modification program which I can implement with WebAssembly?
But you can use the WebAssemblyExplorer https://mbebenita.github.io/WasmExplorer/: There is also a nice video about using WebAssemblyExplorer and even uses a simple WebAssembly-Module: https://www.youtube.com/watch?v=3XrGjSnPHGY&t=310s
https://gist.github.com/Recmo/e0b6911992897c5f51c38fda822537...
To run it you need at least Node 8.0.0 and the `--expose-wasm` flag.
Sorry for using modern JS, you will need to use babel-node to run it. Or you can port it to old fashioned JS.