<!doctype html> <html> <head> <title>XMLHttpRequest: timeout not allowed for sync requests</title> <script src="/resources/testharness.js"></script> <script src="/resources/testharnessreport.js"></script> <link rel="help" href="https://xhr.spec.whatwg.org/#the-timeout-attribute" data-tested-assertations="following::ol/li[1]" /> <link rel="help" href="https://xhr.spec.whatwg.org/#the-open()-method" data-tested-assertations="following::ol/li[10]" /> </head> <body> <div id="log"></div> <script> test(function() { var client = new XMLHttpRequest() client.open('GET', 'folder.txt', false) assert_throws("InvalidAccessError", function() { client.timeout = 1000 }) }, 'setting timeout attribute on sync request') test(function() { var client = new XMLHttpRequest() client.timeout = 1000 assert_throws("InvalidAccessError", function() { client.open('GET', 'folder.txt', false) }) }, 'open() with async false when timeout is set') </script> </body> </html>