lazyload-contents.html (421B)
1 <!DOCTYPE html> 2 <body> 3 <p>This page is lazyloaded.</p> 4 <script> 5 let query_index = window.location.href.indexOf("?id="); 6 let id = window.location.href.substr(query_index + 4); 7 window.addEventListener("load", () => { 8 let p = document.querySelector("p"); 9 let contents = p ? p.innerHTML : "null"; 10 window.parent.postMessage({"id": id, "contents": contents}, "*"); 11 }); 12 </script> 13 </body>