| <!DOCTYPE html> | |
| <link rel=help href="https://bugzilla.mozilla.org/show_bug.cgi?id=1724237"> | |
| <svg> | |
| <animateTransform id="id_0"></animateTransform> | |
| <rect id="id_1"></rect> | |
| </svg> | |
| <script> | |
| new IntersectionObserver((e1, e2) => { | |
| e2.observe(document.getElementById("id_1")) | |
| }).observe(document.getElementById("id_0")) | |
| </script> |