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Utilities to combine & compose Knockout observables

Quick Intro

  • kc.fields explodes an observable of an object into observables for each field.
  • kc.object combines an object of observables into an observable of an object.
  • kc.every combines a list of observables into one observable that is true whenever they all are.
  • kc.any combines a list of observables into one observable that is true whenever any is.
  • kc.toggle creates a callback to toggle a Boolean observable, useful for click bindings.
  • kc.toggleField toggles a field of the view model by name.
  • kc.monotonicObject builds an object based on values it sees in an observable array (this one is a bit fancier).
  • kc.deepUnwrap recursively traverses a value and unwraps all the observables it sees. Especially handy for logging.
  • kc.wrap wraps a value in an observable if it is not already.
  • kc.monitor logs every change to an observable to the console (throttled as this can be crazy).
  • kc.sum sums the values in an observable array.

See the code itself for more details; each function is really quite small. To be expanded as I scrape these out of my various codebases. Pull request very welcome!

Copyright & License

Copyright 2013 Kenneth Knowles

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.