A tiny ~650b centralized state container with component bindings for Preact & React.
- Small footprint complements Preact nicely
- Familiar names and ideas from Redux-like libraries
- Useful data selectors to extract properties from state
- Portable actions can be moved into a common place and imported
- Functional actions are just reducers
- NEW: seamlessly run Unistore in a worker via Stockroom
This project uses node and npm. Go check them out if you don't have them locally installed.
npm install --save unistoreThen with a module bundler like webpack or rollup, use as you would anything else:
// The store:
import createStore from 'unistore'
// Preact integration
import { Provider, connect } from 'unistore/preact'
// React integration
import { Provider, connect } from 'unistore/react'Alternatively, you can import the "full" build for each, which includes both createStore and the integration for your library of choice:
import { createStore, Provider, connect } from 'unistore/full/preact'The UMD build is also available on unpkg:
<!-- just unistore(): -->
<script src="//unpkg.com/unistore/dist/unistore.umd.js"></script>
<!-- for preact -->
<script src="//unpkg.com/unistore/full/preact.umd.js"></script>
<!-- for react -->
<script src="//unpkg.com/unistore/full/react.umd.js"></script>You can find the library on window.unistore.
import createStore from 'unistore'
import { Provider, connect } from 'unistore/preact'
let store = createStore({ count: 0 })
// If actions is a function, it gets passed the store:
let actions = store => ({
// Actions can just return a state update:
increment(state) {
return { count: state.count+1 }
},
// The above example as an Arrow Function:
increment2: ({ count }) => ({ count: count+1 }),
//Actions receive current state as first parameter and any other params next
//check this function as <button onClick={incrementAndLog}>
incrementAndLog: ({ count }, event) => {
console.info(event)
return { count: count+1 }
},
// Async actions can be pure async/promise functions:
async getStuff(state) {
let res = await fetch('/foo.json')
return { stuff: await res.json() }
},
// ... or just actions that call store.setState() later:
incrementAsync(state) {
setTimeout( () => {
store.setState({ count: state.count+1 })
}, 100)
}
})
const App = connect('count', actions)(
({ count, increment }) => (
<div>
<p>Count: {count}</p>
<button onClick={increment}>Increment</button>
</div>
)
)
export default () => (
<Provider store={store}>
<App />
</Provider>
)Make sure to have Redux devtools extension previously installed.
import createStore from 'unistore'
import devtools from 'unistore/devtools'
let initialState = { count: 0 };
let store = process.env.NODE_ENV === 'production' ? createStore(initialState) : devtools(createStore(initialState));
// ...Found a problem? Want a new feature? First of all, see if your issue or idea has already been reported. If not, just open a new clear and descriptive issue.
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