Compile then run. You write AssemblyScript; the playground emits WASM.

Goal

Log 1 to prove the module ran.

@external("env", "log")
declare function log(n: i32): void;

@external("env", "logStr")
declare function logStr(s: string): void;

export function main(): void {
  log(1);
}

@external("env", "log")
declare function log(n: i32): void;

@external("env", "logStr")
declare function logStr(s: string): void;

export function main(): void {
  logStr("compiled then ran");
}

@external("env", "log")
declare function log(n: i32): void;

@external("env", "logStr")
declare function logStr(s: string): void;

export function add(a: i32, b: i32): i32 {
  return a + b;
}
export function main(): void {
  log(add(2, 3));
}

@external("env", "log")
declare function log(n: i32): void;

@external("env", "logStr")
declare function logStr(s: string): void;

export function main(): void {
  log(12);
}