Bun FFI

Bun's FFI allows calling native C/C++ libraries from JavaScript.

Quick Start

import { dlopen, suffix, FFIType } from "bun:ffi";

// Load library
const lib = dlopen(`libc.${suffix}`, {
  printf: {
    args: [FFIType.cstring],
    returns: FFIType.int,
  },
});

// Call function
lib.symbols.printf("Hello from C!\n");