Package Exports

st8
st8/st8.js

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (st8) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

st8

Tiny state machine for structural describing behavior of components.

Usage

$ npm install st8

Standalone state machine

import State from 'st8';

var state = new State({
    // enter, exit
    b: () => () => {},

    // enter shortcut, forwards to state d
    c: () => 'd',

    // shorter cut, redirects to state a
    d: 'a',

    // any other state
    _: 'a'
});


//enter state 'a', invoke corresponding callbacks
state.set('a');

//get current state
state.get(); // 'a'

Define stateful object property

import State from 'st8'

var state = new State({
    a() {
        // onenter
        this === target //true
    },

    b() {
        // onenter
        this === target //true
        return () => {
            // onexit
        }
    }

}, target);

Object.defineProperty(target, property, {
    set: function (value) {
        return state.set(value);
    },
    get: function () {
        return state.get();
    }
});

API

let state = new State(states [, context])

Create a new state machine based on the states object. Optionally pass a context for callbacks.

state.get()

Get current state.

state.set(value)

Transition to a new state, invoking necessary callbacks.

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