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state

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First-class states

statejs.org

nickfargo/state

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# State.js **[State][0]** is a JavaScript library for implementing **[first-class states][1]** on arbitrary **owner** objects. A `State` is a module of behavior — **[expressed][2]** as definitions of **[methods][3]**, **[data][4]**, and/or **[events][5]** — that can be exhibited by its owner. The **State** **[object model][6]** provides for **[hierarchical][7]**, **[compositional][8]**, and **[indirect prototypal][9]** relations between `State`s, facilitating a variety of patterns for reuse and modularity. An owner object exhibits the behavior expressed by its **current state** — method calls the owner receives are automatically dispatched to methods defined or inherited by that `State`. Behavior of the owner is altered by executing **[transitions][10]** that carry its current state reference from one of its `State`s to another. * * * Visit **[statejs.org][]** for an introduction, with sample code, comprehensive [documentation][] including a [getting started][] guide and conceptual [overview][], [API][] reference, and [annotated source][]. ### 👋 [0]: http://statejs.org/ [1]: http://statejs.org/docs/#concepts--states [2]: http://statejs.org/docs/#concepts--expressions [3]: http://statejs.org/docs/#concepts--methods [4]: http://statejs.org/docs/#concepts--data [5]: http://statejs.org/docs/#concepts--events [6]: http://statejs.org/docs/#concepts--object-model [7]: http://statejs.org/docs/#concepts--object-model--superstates-and-substates [8]: http://statejs.org/docs/#concepts--object-model--parastates-and-composition [9]: http://statejs.org/docs/#concepts--object-model--protostates-and-epistates [10]: http://statejs.org/docs/#concepts--transitions [statejs.org]: http://statejs.org/ [documentation]: http://statejs.org/docs/ [getting started]: http://statejs.org/docs/#getting-started [overview]: http://statejs.org/docs/#overview [API]: http://statejs.org/api/ [annotated source]: http://statejs.org/source/