vscode-kcide

In VSCode extensions this is trivial, this is how you create the 'executable': https://github.com/floooh/vscode-kcide/blob/main/src/wasi.ts ...and this is how you run it: https://github.com/floooh/vscode-kcide/blob/2dfc621aade4a2be... The asmx.wasm file is a vanilla POSIX cmdline tool which loads and saves files via fopen/fread/frwrite/fclose, and the tool has been compiled with the WASI SDK: https://github.com/WebAssembly/wasi-sdk The resulting VSCode extension (https://marketplace.visualstudio.com/items?itemName=floooh.v...) then even runs in the VSCode browser version (https://vscode.dev/) But AFAIK there's currently no easy way to get a similar easy to use WASI wrapper in browsers (it's definitely possible though because the VSCode browser version does it - VSCode basically has a filesystem abstraction which works for native filesyste

Not specific to wasmer, but WASI runtimes are much more lightweight than Docker, especially on Windows or macOS. For instance on macOS, a wasmer installation is a single 45 MByte executable, the alternative wasmtime is 28 MBytes, and if performance doesn't matter much, the wasm3 WASI interpreter is a 255 KBytes(!) executable - compared to that, a macOS Docker installation is 1.5 GBytes (and that doesn't even include any docker images). WASI itself can also be used in places where Docker doesn't make sense, for instance in this VSCode extension I'm using a C cmdline tool compiled to a 209 KB WASI blob: https://github.com/floooh/vscode-kcide