store-emitter

A simple redux-inspired state management library that provides more flexible options for listening to changes.

Example

function modifier (action, state) {
  if (action.type === 'example') {
    return { example: true }
  }
}

var store = createStore(modifier, {
  example: false
})

store.on('*', function (action, state, oldState) {
  console.log()
})

store.on('example', function (action, state, oldState) {
  t.ok(state.example)
  t.notOk(previous.example)
})

store({ type: 'example' })

API

createStoreEmitter

Create the store

Parameters

• modifier function
• initialState [object]

Examples

var createStore = require('store-emitter')
var store = createStore(function (action, state) {
  if (action.type === 'change_something') {
    return { something: 'changed' }
  }
})

store

Send an action to the store. Takes a single object parameter. Object must include a type property with a string value, and can contain any other properties.

Parameters

• action object
  • action.type string

Examples

store({
  type: 'example'
  exampleValue: 'anything'
})

store.getState

Get the current state of the store

Examples

var state = store.getState()

store.initialState

Get the initial state of the store

Examples

var state = store.initialState()

store.off

Stop listening for changes to the store. Passing just the action type will remove all listeners for that action type.

Parameters

• event string – an action type
• callback [Function] – optional callback

Examples

store.off('article', function (action, state, oldState) {

})

store.on

Listen for changes to the store

Parameters

• event string – an action type
• callback Function

Examples

store.on('*', function (action, state, oldState) {

})

store.on('article', function (action, state, oldState) {

})

store.on('article:delete', function (action, state, oldState) {

})

store.once

Listen for a single change to the store

Parameters

• event string – an action type
• callback Function

Examples

store.once('article', function (action, state, oldState) {

})

See also

• virtual-app – uses store-emitter as a dependency
• namespace-emitter – is a dependency of store-emitter
• yo-yo.js – a library for building UI components that works well with store-emitter
• minidux – a small alternative to redux that means to be a drop-in replacement

LICENSE

MIT