partytown/docs/public/cross-origin.html at 30954516d2ccf78b96c841176e5c6ea0da026dde · QwikDev/partytown · GitHub

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<html>
  <head>
    <style>
      body {
        background-color: skyblue;
        margin: 2px;
      }
    </style>
  </head>
  <body>
    <div>
      <span>iframe origin:</span>
      <span id="iframe-origin"></span>
    </div>
    <div>
      <span>parent origin:</span>
      <span id="parent-origin"></span>
    </div>
    <script>
      document.getElementById('iframe-origin').textContent = window.origin;

      const url = new URL(location.href);
      const parentOrigin = url.searchParams.get('parentorigin');
      document.getElementById('parent-origin').textContent = parentOrigin;

      setTimeout(async () => {
        await new Promise((resolve) => {
          setTimeout(() => {
            parent.postMessage('88', parentOrigin);
            resolve();
          });
        });
      });

      const crossOriginCookie = document.cookie;

      localStorage.setItem('mph', '88');
    </script>
  </body>
</html>