a redux-like library for managing state with simpler api (1kb)
redux is awesome, but is not enough simple for small and middle application.
With relite
, we don't need to combine | apply | bind
anything, just write pure function and call actions, it done.
Supoort Typescript
.
Delete the support of return type Promise | Function
of Action
.
npm install --save relite
the action of relite
looks like a reducer of redux, but more simple and powerful.
/**
* an action consist of action-type, action-payload, action-handler and action-result
* at this example
* action-type is EXEC_BY
* action-handler is the function accepts two arguments: state and action-payload
* action-result is the result of function
*/
// javascript
export let EXEC_BY = (state, input) => {
let value = parseFloat(input, 10)
return isNaN(value) ? state : {
...state,
count: state.count + value
}
}
// typescript
import { Action } from 'relite'
type State = {
// ...
count: number
}
export let EXEC_BY: Action<State, number> = (state, input) => {
return isNaN(value) ? state : {
...state,
count: state.count + input
}
}
import { createStore } from 'relite'
import * as actions from './actions'
let initialState = {
count: 0
}
let store = createStore(actions, intialState)
/*
* relite will bind state for every actions you gave to `createStore`
* so all the functions in store.actions can only accept one argument, action-payload
* no need to bindActionCreators
* each actions return currentState or promise with currentState
*/
let { INCREMENT, EXEC_BY } = store.actions
INCREMENT() // -> { count: 1 }
EXEC_ASYNC(9) // -> Promise[[{ count: 10 }]]
/**
* subscribe store by store.subscribe
* when the state was changed/updateed, relite would trigger the listeners
* if action-handler return the same state, listeners would not be triggered
*/
let unsubscribe = store.subscribe((data) => {
let {
actionType, // action-type
actionPayload, // action-payload
start, // start date
end, // end date
previousState, // prev-state
currentState // cur-state
} = data
})
let newState = {
count: 0,
}
let simulateData = {
actionType: 'REPLACE_STATE',
actionPayload: null,
start: new Date(),
end: new Date,
previousState: store.getState(), // get current state
currentState: newState,
}
let keepSilent = false // if true, it will not trigger listeners
// replace state by store.replaceState
store.replaceState(newState, simulateData, false)
// trigger listener by store.publish
store.publish(simulateData)
store.dispatch('EXEC_ASYNC', 10) // dispatch the action manually
import { createStore } from 'relite'
import createLogger from 'relite/logger'
...
const store = createStore(actions, initialState)
store.subscribe(createLogger())
Issue and pull request is welcome!