At the time, there was a problem with using innerHTML in Internet Explorer to write content to a page and then select it when traversing the DOM or submit a form with the added content. Not only that, but it's expensive to process and manipulate DOM objects in the browser while they are displayed so this library gave me an easy way to create document fragments and manipulate those to then be injected in the right place.
Over time, I got into working with other libraries and problems like this were solved for me, so I never did much more with it.
I've still got it working in one production site but haven't looked at it in a long time. I thought I'd put it out there on github for posterity.