unclosed-script-already-started.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /domparsing/tentative/unclosed-script-already-started.html - WPT Dashboard Interop Dashboard

<!doctype html>

<meta charset="utf-8" />

<title>Unclosed &lt;script&gt; at the end of a fragment parse is marked "already started"</title>

<link rel="help" href="https://html.spec.whatwg.org/C/#parsing-main-incdata" />

<link rel="help" href="https://html.spec.whatwg.org/C/#html-fragment-parsing-algorithm" />

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<body>

  <div id="container"></div>

  <script>

    // "An end-of-file token: Parse error. If the current node is a script

    // element, then set its already started to true." This applies to fragment

    // parsing too, so an unclosed <script> produced by a fragment parser must

    // never execute, even once it is connected or its text changes.

    function assert_never_runs(script, description) {

      assert_not_equals(script, null, `${description}: script element exists`);

      assert_false(window.unclosed_ran, `${description}: must not run on insertion`);

      script.appendChild(document.createTextNode("window.unclosed_ran = true;"));

      assert_false(window.unclosed_ran, `${description}: must not run when its text changes`);

      const clone = script.cloneNode(true);

      container.appendChild(clone);

      // A clone copies the already started flag.

      assert_false(window.unclosed_ran, `${description}: clone must not run`);

    test((t) => {

      window.unclosed_ran = false;

      t.add_cleanup(() => { delete window.unclosed_ran; container.replaceChildren(); });

      const range = document.createRange();

      range.selectNodeContents(container);

      const fragment = range.createContextualFragment("<script id=ccf>window.unclosed_ran = true;");

      container.appendChild(fragment);

      assert_never_runs(container.querySelector("#ccf"), "createContextualFragment");

    }, "Unclosed <script> from createContextualFragment() never runs");

    test((t) => {

      window.unclosed_ran = false;

      t.add_cleanup(() => { delete window.unclosed_ran; container.replaceChildren(); });

      container.setHTMLUnsafe("<script id=shu>window.unclosed_ran = true;", { runScripts: true });

      assert_never_runs(container.querySelector("#shu"), "setHTMLUnsafe({runScripts: true})");

    }, "Unclosed <script> from setHTMLUnsafe({runScripts: true}) never runs");

    test((t) => {

      window.unclosed_ran = false;

      t.add_cleanup(() => { delete window.unclosed_ran; container.replaceChildren(); });

      const outer = document.createElement("div");

      outer.innerHTML = "<script id=ih>window.unclosed_ran = true;";

      container.appendChild(outer);

      assert_never_runs(container.querySelector("#ih"), "innerHTML then insert");

    }, "Unclosed <script> from innerHTML never runs once connected");

    test((t) => {

      // Control: a closed script from setHTMLUnsafe({runScripts: true}) runs.

      window.unclosed_ran = false;

      t.add_cleanup(() => { delete window.unclosed_ran; container.replaceChildren(); });

      container.setHTMLUnsafe("<script>window.unclosed_ran = true;<" + "/script>", { runScripts: true });

      assert_true(window.unclosed_ran);

    }, "Control: closed <script> from setHTMLUnsafe({runScripts: true}) runs");

  </script>

</body>