docshell/test/navigation/iframe_slow_onload_inner.html

   1 <html>
   2   <head>
   3     <script>
   4       function load() {
   5         // Let the test page know that it can try to navigate.
   6         top.postMessage("onload", "*");
   7         // We're starting an infinite loop, but we need to time out after a
   8         // while, or the loop will keep running until shutdown.
   9         let t0 = performance.now();
  10         while (performance.now() - t0 < 5000) {
  11             document.getElementById("output").innerText = Math.random();
  12         }
  13       }
  14     </script>
  15   </head>
  16   <body onload="load()">
  17     <p id="output"></p>
  18   </body>
  19 </html>