| 1 | /** |
| 2 | * Copyright (c) Meta Platforms, Inc. and affiliates. |
| 3 | * |
| 4 | * This source code is licensed under the MIT license found in the |
| 5 | * LICENSE file in the root directory of this source tree. |
| 6 | * |
| 7 | */ |
| 8 | |
| 9 | import {createContext, useContext} from 'react'; |
| 10 | |
| 11 | // Note: this file does not demonstrate a real data fetching strategy. |
| 12 | // We only use this to simulate data fetching happening on the server |
| 13 | // while the cache is populated on the client. In a real app, you would |
| 14 | // instead use a data fetching library or Server Components for this. |
| 15 | |
| 16 | const DataContext = createContext(null); |
| 17 | |
| 18 | export function DataProvider({children, data}) { |
| 19 | return <DataContext.Provider value={data}>{children}</DataContext.Provider>; |
| 20 | } |
| 21 | |
| 22 | // In a real implementation the data would be streamed with the HTML. |
| 23 | // We haven't integrated this part yet, so we'll just use fake data. |
| 24 | const fakeData = [ |
| 25 | "Wait, it doesn't wait for React to load?", |
| 26 | 'How does this even work?', |
| 27 | 'I like marshmallows', |
| 28 | ]; |
| 29 | |
| 30 | export function useData() { |
| 31 | const ctx = useContext(DataContext); |
| 32 | if (ctx !== null) { |
| 33 | // This context is only provided on the server. |
| 34 | // It is here to simulate a suspending data fetch. |
| 35 | ctx.read(); |
| 36 | } |
| 37 | return fakeData; |
| 38 | } |