| 8 | const doSleep = (ms: number) => new Promise((r) => setTimeout(r, ms)) |
| 9 | |
| 10 | export const fetchPost = async ({ |
| 11 | postId, |
| 12 | simulateError, |
| 13 | sleep, |
| 14 | }: { |
| 15 | postId: number |
| 16 | simulateError?: boolean |
| 17 | sleep?: number |
| 18 | }) => { |
| 19 | console.info('[api] fetchPost.start', { postId, sleep, simulateError }) |
| 20 | |
| 21 | let response |
| 22 | if (!simulateError) { |
| 23 | response = await fetch( |
| 24 | `https://jsonplaceholder.typicode.com/posts/${postId}`, |
| 25 | ).then((res) => res.json()) |
| 26 | } |
| 27 | |
| 28 | // simulate extra latency to make things like streaming behavior more clear |
| 29 | if (sleep) { |
| 30 | await doSleep(sleep) |
| 31 | } |
| 32 | |
| 33 | console.info('[api] fetchPost.done', { postId, sleep, simulateError }) |
| 34 | |
| 35 | if (simulateError) { |
| 36 | throw new Error('API request to get post was not OK') |
| 37 | } |
| 38 | |
| 39 | return [response] as PostData[] |
| 40 | } |
| 41 | |
| 42 | export const fetchUser = async ({ |
| 43 | sleep, |