re-frame.middleware

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ClojureScript only.

debug
noop
path
pure
trim-v
undoable
validate

debug^cljs

(debug handler)

Middleware which logs debug information to js/console for each event. Includes a clojure.data/diff of the db, before vs after, showing changes.

Middleware which logs debug information to js/console for each event.
Includes a clojure.data/diff of the db, before vs after, showing changes.

source raw docstring

noop^cljs

(noop handler)

Middleware which does nothing

Middleware which does nothing

source raw docstring

path^cljs

(path p)

Supplies a sub-tree of db to the handler. A narrowed view. Assumes "pure" is in the middleware pipeline prior. Grafts the result back into db.

Supplies a sub-tree of `db` to the handler. A narrowed view.
Assumes "pure" is in the middleware pipeline prior.
Grafts the result back into db.

source raw docstring

pure^cljs

(pure handler)

Acts as an adaptor, allowing handlers to be writen as pure functions. The re-frame router will pass in an atom as the first parameter. This middleware adapts that to the value within the atom. If you strip away the error/efficiency checks, this middleware is just: (reset! app-db (handler @app-db event-vec))

Acts as an adaptor, allowing handlers to be writen as pure functions.
The re-frame router will pass in an atom as the first parameter. This middleware
adapts that to the value within the atom.
If you strip away the error/efficiency checks, this middleware is just:
   (reset! app-db (handler @app-db event-vec))

source raw docstring

trim-v^cljs

(trim-v handler)

Middleware which removes the first element of v. Its use means you can write more asthetically pleasing handlers. Your handlers will look like this: (defn my-handler [db [x y z]] ;; <-- instead of [_ x y z] ....)

Middleware which removes the first element of v. Its use means you can write
more asthetically pleasing handlers.
Your handlers will look like this:
    (defn my-handler
      [db [x y z]]    ;; <-- instead of [_ x y z]
      ....)

source raw docstring

undoable^cljs

(undoable handler)

Middleware which stores an undo checkpoint.

Middleware which stores an undo checkpoint.

source raw docstring

validate^cljs

(validate f)

Middleware factory which applies a given validation function "f" to db after the handler is finished. This validation function f, might further change db, by perhaps assoc-ing warnings and errors into db.

Middleware factory which applies a given validation function "f" to db
after the handler is finished.
This validation function f, might further change db, by perhaps
 assoc-ing warnings and errors into db.

source raw docstring