Clone this repo:
  1. 7b35bf7 Bump dev dependencies on build packages (#72) by Nicholas Shahan · 4 weeks ago master
  2. 9d09e57 Deprecate `retype` (#71) by Nicholas Shahan · 8 weeks ago 0.22.1+3
  3. e9369be Update implementations of the `cast` and the deprecated `retype` methods. (#70) by Lasse R.H. Nielsen · 8 weeks ago
  4. baa813d Widen quiver dependency (#69) by Nicholas Shahan · 9 weeks ago 0.22.1+2
  5. 1174dec Fix Dart2 runtime errors in tests by Nicholas Shahan · 3 months ago 0.22.1+1

Build Status

Support for detecting and being notified when an object is mutated.

An observable is a way to be notified of a continuous stream of events over time.

Some suggested uses for this library:

  • Observe objects for changes, and log when a change occurs
  • Optimize for observable collections in your own APIs and libraries instead of diffing
  • Implement simple data-binding by listening to streams

You may want to look at the former TC39 proposal Observe.observe, which was deprecated.


There are two general ways to detect changes:

  • Listen to Observable.changes and be notified when an object changes
  • Use Differ.diff to determine changes between two objects