<!DOCTYPE HTML> <html> <head> <title>Bug 1121857 - document.baseURI should not get blocked if baseURI is null</title> </head> <body> <script type="text/javascript"> // check the initial base-uri window.parent.postMessage({baseURI: document.baseURI, test: "initial_base_uri"}, "*"); // append a child and check the base-uri var baseTag = document.head.appendChild(document.createElement('base')); baseTag.href = 'http://www.base-tag.com'; window.parent.postMessage({baseURI: document.baseURI, test: "changed_base_uri"}, "*"); // remove the child and check that the base-uri is back to the initial one document.head.remove(baseTag); window.parent.postMessage({baseURI: document.baseURI, test: "initial_base_uri"}, "*"); </script> </body> </html>