WebAssembly or wasm is a new portable, size- and load-time-efficient format suitable for compilation to the web.

  • Efficient & fast
  • Safe
  • Open and debuggable
  • Part of the open web platform

Ref: webassembly.org

Say Hello to WebAssembly

  • Download & Install emscripten.

  • Write hello.c in C/C++

    #include <stdio.h>

int main() {
  printf("hello, world!\n");
  return 0;
}
  • Run emcc hello.c, then you can get a a.out.js.

  • Run node a.out.js

    C:\Users\Administrator\Desktop>emcc hello.c

C:\Users\Administrator\Desktop>node a.out.js
hello, world!

Create HTML file to run hello.c

  • Run emcc hello.c -o hello.html
  • Open hello.html with Chrome.