after-load-hash-twice.html

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This WPT test may be referenced by the following Test IDs:
- /html/browsers/browsing-the-web/history-traversal/event-order/after-load-hash-twice.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset="utf-8">

<title>Popstate/hashchange/load event ordering</title>

<script>

// Set these up super-early before we hit the network for the test harness, just in case.

window.eventOrder = [];

window.onhashchange = () => window.eventOrder.push("hashchange");

window.onpopstate = () => window.eventOrder.push("popstate");

window.onload = () => window.eventOrder.push("load");

</script>

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

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

<script>

async_test(t => {

  assert_array_equals(window.eventOrder, []);

  // 0 timeout is necessary because if we do location.hash assignment before load is finished firing it counts as a replacement.

  window.addEventListener("load", () => t.step_timeout(() => {

    assert_array_equals(window.eventOrder, ["load"]);

    window.addEventListener("hashchange", t.step_func(() => {

      assert_array_equals(window.eventOrder, ["load", "popstate", "popstate", "hashchange"]);

      window.addEventListener("hashchange", t.step_func_done(() => {

        assert_array_equals(window.eventOrder, ["load", "popstate", "popstate", "hashchange", "hashchange"]);

      }));

    }), { once: true });

    location.hash = "#1";

    assert_array_equals(window.eventOrder, ["load", "popstate"]);

    location.hash = "#2";

    assert_array_equals(window.eventOrder, ["load", "popstate", "popstate"]);

  }, 0));

}, "when changing hash, after the load event");

</script>