tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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scroll-margin-propagation-iframe-3.html (394B)

      1 <!DOCTYPE html>
      2 
      3 <p>Iframe 3</p>
      4 <div style="width: 100px; height: 100px; background: green" id="target">Target</div>
      5 
      6 <script>
      7 const options = {
      8  root: null,
      9  scrollMargin: "50px"
     10 };
     11 
     12 const observer = new IntersectionObserver(records => {
     13  window.top.postMessage({ msgName: "isIntersectingChanged", value: records[0].isIntersecting }, "*");
     14 }, options);
     15 
     16 observer.observe(target);
     17 </script>