<!DOCTYPE html> <html> <head> <title>Blob URL Partitioning Test</title> </head> <body> <script> onmessage = e => { fetch(e.data) .then(response => { if (!response.ok) { throw new Error(); } return response.text(); }) .then(text => { parent.postMessage(text, "*"); }) .catch(error => { parent.postMessage("error", "*"); }); }; </script> </body> </html>