<!DOCTYPE html> <html> <head> <link rel="help" href="https://xhr.spec.whatwg.org/#the-send()-method" /> <link rel="help" href="https://xhr.spec.whatwg.org/#the-responsetype-attribute" data-tested-assertations="following::ol[1]/li[4]"/> <link rel="help" href="https://xhr.spec.whatwg.org/#the-response-attribute" data-tested-assertations="following::a[contains(@href,'#blob-response-entity-body')]/.." /> <script src="/resources/testharness.js"></script> <script src="/resources/testharnessreport.js"></script> <title>XMLHttpRequest: The response attribute: Blob data</title> </head> <body> <div id="log"></div> <script type="text/javascript"> var test = async_test(); test.step(function() { var xhr = new XMLHttpRequest(); var content = "Hello"; var blob; xhr.onreadystatechange = function() { if (xhr.readyState == 4) { test.step(function() { blob = xhr.response; assert_equals(xhr.response, xhr.response, "Response should be cached"); assert_true(blob instanceof Blob, 'blob is a Blob'); var reader = new FileReader(); reader.onload = function() { test.step(function() { assert_equals(reader.result, content); test.done(); }); }; reader.readAsText(blob); }); } } xhr.open("GET", "./resources/content.py?content=" + content, true); xhr.responseType = "blob"; xhr.send(); }); </script> </body> </html>