WASM Terminal Emulator Status?

In theory, could one "port all of linux" and create a terminal that runs in a browser and uses localstorage as the hard drive with ls and more and cat, vim etc. commands that all work? (Like xterm.js but real)

How far could you take this? Could I get the entire golang toolchain to work and compile a simple main.go program from within this WasmOS terminal?