This library is an OCaml wrapper of Matt Esch's virtual-dom library. It provides a simple, immutable representation of a desired state of the DOM, as well as primitives for updating the real DOM in the browser to match that, both by slamming the entire DOM in place, and by computing diffs between successive virtual-DOMs, and applying the resulting patch to the real DOM.
It has been vendored internally as the external library has gone unsupported for many years and we needed some modifications.
Please exercise a high degree of caution if you modify this library. Our testing
infrastructure doesn't support robust browser testing, so any changes here should be
thoroughly smoke tested on a variety of apps with different usecases and potential DOM
abuses. We intend this code to be as stable/unchanging as possible because of the
difficult testing situation and near ubiquitous use in web apps at Jane Street.