<html> <head> <script> function runTest() { var blob = new Blob(["0123456789"]); var reader = new FileReader(); reader.onload = function(event) { console.log("Received data: " + event.target.result); } reader.onloadend = function() { if (window.testRunner) testRunner.notifyDone(); } reader.onerror = function(event) { console.log("Received error event: " + event.target.error.code); }; reader.readAsText(blob); } </script> </head> <body onload="runTest()"> </body> </html>