Obviously, if you only need to analyze the current URL, you can use window/document.location, but there are times when you want to parse a URI for a page you aren't on. For instance, if you are analyzing har data, and want to break URI "components" into columns so they are sortable.
And this library doesn't have a strong reason to tie itself to jQuery. It doesn't need jQuery's DOM operation or AJAX. It's like making a program depending on third party library without actually using any of the feature.
The best lightweight js library I've found/used in the past is parseUri:
http://blog.stevenlevithan.com/archives/parseuri
Obviously, if you only need to analyze the current URL, you can use window/document.location, but there are times when you want to parse a URI for a page you aren't on. For instance, if you are analyzing har data, and want to break URI "components" into columns so they are sortable.