Last active
May 14, 2022 19:50
-
-
Save cdaz5/507c67f2cb20cb128c83789ac7e43c8f to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| import React from 'react'; | |
| const SpicyStateCtx = React.createContext(null); | |
| const SpicyApiCtx = React.createContext(null); | |
| // custom provider | |
| const SpicyProvider = ({ children }) => { | |
| const [spice, setSpice] = React.useState("pepper"); | |
| const api = React.useMemo( | |
| () => ({ | |
| gingerSpice: () => setSpice("ginger"), | |
| sportySpice: () => setSpice("sporty") | |
| }), | |
| [setSpice] | |
| ); | |
| return ( | |
| <SpicyStateCtx.Provider value={spice}> | |
| <SpicyApiCtx.Provider value={api}> | |
| {children} | |
| </SpicyApiCtx.Provider> | |
| </SpicyStateCtx.Provider> | |
| ); | |
| }; | |
| // custom hook for the value | |
| export const useSpicyState = () => { | |
| const ctx = React.useContext(SpicyStateCtx); | |
| if (!ctx) { | |
| throw new Error("useSpicyState must be used within the SpicyProvider"); | |
| } | |
| return ctx; | |
| }; | |
| // custom hook for the api | |
| export const useSpicyApi = () => { | |
| const ctx = React.useContext(SpicyApiCtx); | |
| if (!ctx) { | |
| throw new Error("useSpicyApi must be used within the SpicyProvider"); | |
| } | |
| return ctx; | |
| }; | |
| // in another file | |
| import { useSpicyState, SpicyProvider } from 'a-special-place'; | |
| const BlandFood = () => { | |
| const spice = useSpicyState(); | |
| return <>{spice}</>; | |
| }; | |
| const SpiceButtons = () => { | |
| const { sportySpice, gingerSpice } = useSpicyApi(); | |
| return ( | |
| <> | |
| <button type="button" onClick={sportySpice}> | |
| Sporty | |
| </button> | |
| <button type="button" onClick={gingerSpice}> | |
| Ginger | |
| </button> | |
| </> | |
| ); | |
| }; | |
| const App = () => ( | |
| <SpicyProvider> | |
| <div> | |
| <BlandFood /> | |
| <SpiceButtons /> | |
| </div> | |
| </SpicyProvider> | |
| ); |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment