Test setting the port attribute of the URL in HTMLAnchorElement. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". Default port as number PASS a.href is 'https://www.mydomain.com/path/testurl.html?key=value' Default port as string PASS a.href is 'https://www.mydomain.com/path/testurl.html?key=value' Set port to 0 PASS a.href is 'https://www.mydomain.com:0/path/testurl.html?key=value' Set port to non-number PASS a.href is 'https://www.mydomain.com:4/path/testurl.html?key=value' Set port to null PASS a.href is 'https://www.mydomain.com:0/path/testurl.html?key=value' Set port to empty string PASS a.href is 'https://www.mydomain.com:0/path/testurl.html?key=value' Set port to undefined PASS a.href is 'https://www.mydomain.com:0/path/testurl.html?key=value' Set port to URL with foo: protocol PASS a.href is 'foo://bar:50/' PASS successfullyParsed is true TEST COMPLETE