ntainer.appendChild(s);
    let text = document.createTextNode("postMessage('appendChild with a live " +
                                       "text node should be blocked', '*');");
    await checkMessage(t, _ => s.appendChild(text));
  }, "Regression test: Bypass via appendChild into live script element.");

  promise_test(async t => {
    const inserted_script = document.getElementById("script1");
    await trusted_type_violation_for(TypeError, _ =>
      inserted_script.innerHTML = "2+2"
    );

    le