You can similarly search/replace JS code, but using pattern matching and CSS style selectors instead of writing code, with Grasp. It's usable from the command line like sed.

http://www.graspjs.com/

For instance changing all calls to "calc" from taking two arguments to taking one object literal instead (eg. `calc(1, 2)` to `calc({from: 1, to: 2})`, is as easy as:

    $ grasp -r -e 'calc($a, $b)' -R 'calc({from: {{a}}, to: {{b}}})' file.js

(Where the two arguments to "calc" could be any arbitrary nested expressions, which could not be safely handled by a regular expression)