<!DOCTYPE html> <html> <head> <link rel="help" href="https://xhr.spec.whatwg.org/#the-abort()-method" data-tested-assertations="following-sibling::ol/li[4]/ol/li[7]/ol/li[4]" /> <script src="/resources/testharness.js"></script> <script src="/resources/testharnessreport.js"></script> <title>XMLHttpRequest: The abort() method: Fire a progress event named loadend on the XMLHttpRequestUpload object</title> </head> <body> <div id="log"></div> <script type="text/javascript"> var test = async_test(); test.step(function() { var xhr = new XMLHttpRequest(); xhr.onloadstart = function() { test.step(function () { if (xhr.readyState == 1) { xhr.abort(); } }); }; xhr.upload.onloadend = function(e) { test.step(function() { assert_true(e instanceof ProgressEvent); assert_equals(e.type, "loadend"); assert_equals(e.target, xhr.upload); test.done(); }); }; xhr.open("POST", "./resources/content.py", true); xhr.send("Test Message"); }); </script> </body> </html>