<!DOCTYPE html> <html> <head> <title>XMLHttpRequest: open() call fires sync readystate event</title> <script src="/resources/testharness.js"></script> <script src="/resources/testharnessreport.js"></script> <link rel="help" href="https://xhr.spec.whatwg.org/#the-open()-method" data-tested-assertations="following::ol[1]/li[13]/ol[1]/li[2]" /> </head> <body> <div id="log"></div> <script> test(function() { var client = new XMLHttpRequest() var eventsFired = [] client.onreadystatechange = function(){ eventsFired.push(client.readyState) } client.open('GET', "...", false) assert_array_equals(eventsFired, [1]) }, document.title + ' (sync)') test(function() { var client = new XMLHttpRequest() var eventsFired = [] client.onreadystatechange = function(){ eventsFired.push(client.readyState) } client.open('GET', "...", true) assert_array_equals(eventsFired, [1]) }, document.title + ' (async)') </script> </body> </html>