File: cross-origin-transfer-resizable-arraybuffer.html

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<!DOCTYPE html>
<title>postMessage transfer ArrayBuffer cross origin iframe</title>
<script src='/resources/testharness.js'></script>
<script src='/resources/testharnessreport.js'></script>
<script src='/common/get-host-info.sub.js'></script>

<script>

async_test(t => {
  const oopif = document.createElement('iframe');

  window.addEventListener('message', t.step_func((e) => {
    if (e.data === 'started') {
      const rab = new ArrayBuffer(32, { maxByteLength: 1024 });
      oopif.contentWindow.postMessage(rab, '*', [rab]);
    } else {
      assert_equals(e.data, 'byteLength=32,maxByteLength=1024,resizable=true');
      t.done();
    }
  }));

  window.addEventListener('load', () => {
    oopif.src = `${get_host_info().HTTP_REMOTE_ORIGIN}/html/infrastructure/safe-passing-of-structured-data/resources/iframe-resizable-arraybuffer-helper.html`;
    document.body.appendChild(oopif);
  });
}, 'postMessaging resizable ArrayBuffer to OOPIF');

</script>