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chromium/third_party/blink/web_tests/external/wpt/wasm/webapi/esm-integration/wasm-js-cycle.tentative.html 

<!doctype html>
<title>Check bindings in JavaScript and WebAssembly cycle (Wasm higher)</title>

<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script type=module>
setup({ single_test: true });
import * as wasm from "./resources/wasm-js-cycle.wasm";
import * as js from "./resources/wasm-js-cycle.js";

js.mutateBindings();

assert_true(wasm.wasmGlob instanceof WebAssembly.Global);
assert_equals(wasm.wasmGlob.valueOf(), 24);

assert_true(wasm.wasmFunc instanceof Function);
assert_equals(wasm.wasmFunc(), 43);

assert_equals(wasm.incrementGlob(), 43);

const buf = new Int32Array(wasm.wasmMem.buffer);
assert_equals(buf[0], 0);
assert_equals(wasm.mutateMem(), 42);
assert_equals(buf[0], 42);

assert_equals(wasm.wasmTab.get(0), null);
const ref = wasm.mutateTab();
assert_true(ref instanceof Function);
assert_equals(wasm.wasmTab.get(0), ref);

done();
</script>