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Add note about the upcoming Javascript Observable proposal.

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Timothy Farrell 2017-11-09 08:10:39 -06:00
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# FRP tools
Observer and computed value stores designed to work together for storing real state and derived
Observer and Computed value stores designed to work together for storing real state and derived
state.
# [observable](./src/observable.js)
`observable` is a simple value store that can report when its value changes. It is good for wrapping
external props passed into a component so compute types can dependent on them.
external props passed into a component so compute types can dependent on them. It can also be used
to receive events such as _window.onresize_ to always provide the current viewport size.
NOTE: Javascript has a proposal for a thing called an
[Observable](https://github.com/tc39/proposal-observable). This is not an implementation of that.
They do serve similar functions (provide a way to communicate when a value changes) but the tc39
proposal is more about event input sources and can communicate errors and be extended. This
implementation is designed to be as small and simple as possible. Extending it is done via
[Computed] instances depending on them. I may rename `observable` to `property` in a future major
release to avoid this confusion.
## Usage