<!doctype html> <meta charset=utf-8> <title>Check that a sync XHR in a defer script blocks later defer scripts from running</title> <script src=/resources/testharness.js></script> <script src=/resources/testharnessreport.js></script> <!-- We run the test in a subframe, because something in the testharness stuff interferes with defer scripts --> <script> var t = async_test(); onmessage = t.step_func_done(function(e) { assert_equals(e.data, 1); }); </script> <iframe src="xmlhttprequest-sync-block-defer-scripts-subframe.html"></iframe>