This is exactly the use case I ran into most often, and I have designed a small library precisely to do these computations without touching the DOM. If you want

This is exactly the use case I ran into most often, and I have designed a small library precisely to do these computations without touching the DOM. If you want to have a look, it is on https://www.github.com/andreaferretti/paths-js https://www.github.com/andreaferretti/paths-js