Currently, there is an extra) at the end of the value portion of thebaseURL parameter.

    baseURL:                   // URL for use with links to tags (when there is a <base> tag in effect)       (document.getElementsByTagName('base').length === 0) ?        '' : String(document.location).replace(/#.*$/, '')),

If the code is copied and tested as it currently is in the docs, it results in the following error in the console:
Uncaught SyntaxError: missing } after property list test.html:31:63
note: { opened at line 9, column 12test.html:9:12

While this seems quite benign, the problem is that parameter changes before this invalid line are ignored. For example, settingmaxBuffer: 50 * 1024 does not get implemented due to the error which can lead to confusion.