<!DOCTYPE html> <html> <head> <meta charset=windows-1252> <title>XMLHttpRequest: open() - URL encoding</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/li[7] following::ol/li[14]/ul/li[2]" /> </head> <body> <div id="log"></div> <script> test(function() { var client = new XMLHttpRequest() client.open("GET", "resources/content.py?\u00DF", false) // This is the German "eszett" character client.send() assert_equals(client.getResponseHeader("x-request-query"), "%C3%9F") }, "percent encode characters"); test(function() { var client = new XMLHttpRequest() client.open("GET", "resources/content.py?\uD83D", false) client.send() assert_equals(client.getResponseHeader("x-request-query"), "%EF%BF%BD") }, "lone surrogate should return U+FFFD"); </script> </body> </html>