This is a polyfill for Pointer Events, written using jQuery's special events API.
Pointer Events provide a unified event model, which we feel provides a much better future than Mouse + Touch. The jQuery team is very interested in seeing a future where Mouse Events and Touch Events are a thing of the past, and all developers leverage Pointer Events exclusively. This polyfill is an attempt to make that dream a reality today.
For some history on Touch vs. Pointer, check out our blog post Getting Touchy about Patents.