mq_changes_child.html (244B)
1 <script> 2 const mql = matchMedia("(prefers-reduced-motion: reduce)"); 3 mql.addEventListener("change", event => { 4 parent.postMessage({ "matches": event.matches }, "*"); 5 }); 6 7 window.onload = () => { parent.postMessage("ready", "*"); }; 8 </script>