Michael Greenberg also published a JavaScript lenses library back in 2007, as part of his thesis at the University of Pennsylvania: http://www.cis.upenn.edu/~m

Michael Greenberg also published a JavaScript lenses library back in 2007, as part of his thesis at the University of Pennsylvania: http://www.cis.upenn.edu/~mgree/ugrad/lenses/docs/overview-summary-lens.js.html http://www.cis.upenn.edu/~mgree/ugrad/lenses/docs/overview-s... It's a bit dated now, to be sure, as there have since been many developments in the field of "bidirectional programming". See, for example, Daniel Wagner's paper on "Edit Lenses": http://dmwit.com/papers/201107EL.pdf http://dmwit.com/papers/201107EL.pdf