Created
September 20, 2023 21:26
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| interface Response<T> { | |
| status: 'success' | 'pending' | 'error'; | |
| data: T | null; | |
| } | |
| /** | |
| * A promise tracker that will be updated | |
| * when promise resolves or rejects | |
| */ | |
| const response: Response<unknown> = { | |
| status: 'pending', | |
| data: null | |
| }; | |
| /** | |
| * This is our suspender function | |
| * that throws promise if it is not fulfilled yet | |
| */ | |
| export function suspend<T>(fn: () => Promise<T>) { | |
| /** | |
| * suspender is the promise we will throw | |
| * so react can re-render when it is fulfilled | |
| */ | |
| const suspender = fn().then( | |
| (res) => { | |
| response.status = 'success'; | |
| response.data = res; | |
| }, | |
| (error) => { | |
| response.status = 'error'; | |
| response.data = error; | |
| } | |
| ); | |
| switch (response.status) { | |
| case 'pending': | |
| throw suspender; | |
| case 'error': | |
| throw response.data as T; | |
| default: | |
| return response.data as T; | |
| } | |
| } |
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