1907428.html (389B)
1 <!DOCTYPE html> 2 <meta charset="utf-8"> 3 <script> 4 const onstatechange = () => { 5 const xhr = new XMLHttpRequest(".") 6 xhr.open("POST", "1", false) 7 xhr.send() 8 } 9 const observe = (ev) => { 10 ev.addEventListener("statechange", onstatechange, { }) 11 } 12 document.addEventListener("DOMContentLoaded", async () => { 13 await self.fetch(".", { 14 keepalive: true, 15 observe, 16 }) 17 }) 18 </script>