firefox-bug-1724237.html (335B)
1 <!DOCTYPE html> 2 <link rel=help href="https://bugzilla.mozilla.org/show_bug.cgi?id=1724237"> 3 <svg> 4 <animateTransform id="id_0"></animateTransform> 5 <rect id="id_1"></rect> 6 </svg> 7 <script> 8 new IntersectionObserver((e1, e2) => { 9 e2.observe(document.getElementById("id_1")) 10 }).observe(document.getElementById("id_0")) 11 </script>