<!doctype html>
<title>Destination of a Redirect</title>
<script src="stash.js"></script>
<script>
function checkScroll() {
  // Two rAFs since the exact timing of when we cause scrolling is up to the
  // UA.
  requestAnimationFrame(() => {
    requestAnimationFrame(() => {
      let twice = (new URL(document.location)).searchParams.get("twice");
      let key = (new URL(document.location)).searchParams.get("key");
      let results = {
        scrolled: (window.pageYOffset != 0),
      };

      if (twice != null) {
        // If this param is specified, we'll try to redirect to another
        // text-fragment after this one has been invoked.
        if (!results.scrolled) {
          results.scrolled = null;
          stashResultsThenClose(key, results);
          throw "Intermediate page failed to scroll to fragment";
        }

        window.location = `redirects-target2.html?key=${key}#:~:text=target`;
      } else {
        stashResultsThenClose(key, results);
      }
    });
  });
}
window.addEventListener('load', checkScroll);
</script>
<style>
  p#target {
    margin: 2000px 0px 2000px 0px;
  }
</style>
<body>
  <p>Top of page</p>
  <p id="target">target</p>
</body>