WebAssembly.Global

const output = document.getElementById("output");

function assertEq(msg, got, expected) {
  const result =
    got === expected
      ? `${got}\n`
      : `\n${got}\n${expected}\n`;
  output.innerText += `${msg}${result}`;
}

assertEq("WebAssembly.Global ", typeof WebAssembly.Global, "function");

const global = new WebAssembly.Global({ value: "i32", mutable: true }, 0);

WebAssembly.instantiateStreaming(fetch("global.wasm"), { js: { global } }).then(
  ({ instance }) => {
    assertEq(" wasm ", instance.exports.getGlobal(), 0);
    global.value = 42;
    assertEq(" wasm  JS ", instance.exports.getGlobal(), 42);
    instance.exports.incGlobal();
    assertEq(" JS  wasm ", global.value, 43);
  },
);