dynamic varsince v1.7.10Edit
Source docstring:
Each runtime environment provides various ways to eval JavaScript
source. Whatever function *eval-fn* is bound to will be passed a map
containing the following keys:

:source - the source of the library (string)
:name   - used to unique identify the script (symbol)
:cache  - if the source was originally ClojureScript, will be given the
          analysis cache.

The result of evaluation should be the return value.
Source code @ clojurescript:src/main/cljs/cljs/js.cljs
  ^{:dynamic true}
  (fn [m]
    (throw (js/Error. "No *eval-fn* set"))))