chromium/third_party/blink/web_tests/external/wpt/soft-navigation-heuristics/soft-navigation-detection-web-component-lifecycle.tentative.html

<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<title>Detect simple soft navigation.</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<script src="resources/soft-navigation-helper.js"></script>
</head>
<body>
  <script>
    // Define a custom element
    class SPAContent extends HTMLDivElement {
      constructor() {
        super();
      }
      connectedCallback() {
        // Change the URL
        history.pushState({}, '', "/foobar.html");
      }
    }
    customElements.define("spa-content", SPAContent, { extends: "div"});

  </script>
  <main id=main>
  <a id=link>Click me!</a>
  </main>
  <script>
    const link = document.getElementById("link");
    testSoftNavigation({
      addContent: () => {
        const main = document.getElementById("main");
        const spaContent = document.createElement("div", {is: "spa-content"});
        const content = document.createTextNode("Lorem Ipsum");
        spaContent.appendChild(content);
        main.appendChild(spaContent);
      },
      link: link,
      pushState: null,
      test: "Test that a soft navigation is detected when the click is done  "
        + "on a custom element."});
  </script>
</body>
</html>