عکس Aslemammad
😍 Use React Context better.TypeScript
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Contextism 🤩 is a new way to use React Context better.

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Read this article to become familiar with the idea.

Installation 🔥

npm i contextism
// or 
yarn add contextism

Usage ✏️

We have two ways to use Contextism, Creating store using it or using its hooks directly:

#1 createStore ✋

// store.js
import { createStore } from "contextism"
const context = createStore("default value for state")
export const {
    Provider,
    useDispatchContext,
    useStateContext,
    useStore,
} = context

// App.jsx
import Div from "./Div"
import { Provider } from "./store"

const App = () => {
    const [state, dispatch] = React.useState("Value for state") // or useReducer

    return (
        <Provider state={state} dispatch={dispatch}>
            // Components you want to use the state there.
            <Div />
        </Provider>
    )
}

// Div.jsx
import { useStateContext, useDispatchContext, useStore } from "./store"

const Div = () => {
    const state = useStateContext() // "Value for state"
    const dispatch = useDispatchContext() // dispatch function (setState) in App
    // or better one
    const [state, dispatch] = useStore()

    //return ...
}

When we create store using Contextism, it gives us 3 hooks :

  • useStateContext: the state value that we gave it to state prop in Provider component

  • useDispatchContext: the setState function or useReducer dispatch that we passed it to dispatch prop

  • useStore: returns us an array with two values of the above hooks; [ useStateContext, useDispatchContext ]

    NOTE: you should use these hooks( methods of createStore function) in child components of Provider component.

#2 default hooks ✋

Contextism has two hooks beside createStore function:

  • useContext: takes a React context and returns the value
  • useStore: takes two React contexts and returns two values of them, the same thing like in the above way but with two arguments
// Store.jsx
export const CountStateContext = React.createContext()
export const CountDispatchContext = React.createContext()
function countReducer(state, action) {
    //...
}

export function CountProvider({ children }) {
    const [state, dispatch] = React.useReducer(countReducer, { count: 0 })
    return (
        <CountStateContext.Provider value={state}>
            <CountDispatchContext.Provider value={dispatch}>
                {children}
            </CountDispatchContext.Provider>
        </CountStateContext.Provider>
    )
}
// App.jsx
import { CountProvider } from "./Store"
import Div from "./Div"
export function App() {
    return (
        <CountProvider>
            <Div />
        </CountProvider>
    )
}
// Div.jsx
import { CountStateContext, CountDispatchContext } from "./Store"
import { useContext, useStore } from "contextism"

export function Div() {
    const state = useContext(CountStateContext)
    const dispatch = useContext(CountDispatchContext)
    // Or much better:
    const [state, dispatch] = useStore(CountStateContext, CountDispatchContext)

    //return ...
}

Typescript 🔷

Contextism has Typescript support like generics and ... . in createStore you can pass two generics too, first one for the state structure and interface, the second one for the useReducer hook.

type Action = { type: "increment" } | { type: "decrement" }
type State = { count: number }
// The second generic is for useReducer Action
const context = createStore<State, Action>()

// For useState just pass the first generic (State interface generic)
const context = createStore<State>()

Donation

You can support me and my projects with Open Collective.

Contribution

I'm developer, not a perfect person, so I make many mistakes, it means that be free to create issues and then PRs.

Thanks ❤️

Special thanks for contributing and using this project.