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GitHub avatar search with React Hooks
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| const { useState, useEffect, useRef } = React; | |
| const GITHUB_USERS_API_URL = "https://api.github.com/users"; | |
| const GITHUB_CLIENT_ID = "8b7993e07c6a5750c784"; | |
| const GITHUB_CLIENT_SECRET = "fd815b52e8b01fd07995f30ba54f3b799d9ef93e"; | |
| const USER_CACHE_MAX_SIZE = 5; | |
| const useCache = (cacheMaxSize) => { | |
| const { current: cache } = useRef(new Map()); | |
| const hasKey = (key) => cache.has(key); | |
| const getValue = (key) => cache.get(key); | |
| const updateCache = (key, value) => { | |
| cache.set(key, value); | |
| if (cache.size > cacheMaxSize) { | |
| const oldestKey = Array.from(cache.keys()).shift(); | |
| cache.delete(oldestKey); | |
| } | |
| }; | |
| return { has: hasKey, get: getValue, set: updateCache }; | |
| }; | |
| const useGitHubUser = (username) => { | |
| const [user, setUser] = useState({}); | |
| const userCache = useCache(USER_CACHE_MAX_SIZE); | |
| useEffect(() => { | |
| const fetchUser = async () => { | |
| const headers = new Headers({ | |
| Authorization: `Basic ${btoa( | |
| `${GITHUB_CLIENT_ID}:${GITHUB_CLIENT_SECRET}` | |
| )}`, | |
| }); | |
| const response = await fetch(`${GITHUB_USERS_API_URL}/${username}`, { | |
| headers, | |
| }); | |
| const data = await response.json(); | |
| userCache.set(username, data); | |
| setUser(data); | |
| }; | |
| if (userCache.has(username)) { | |
| setUser(userCache.get(username)); | |
| } else { | |
| fetchUser(); | |
| } | |
| }, [username]); | |
| return user; | |
| }; | |
| const useDebounce = (value, delay) => { | |
| const [debouncedValue, setDebouncedValue] = useState(value); | |
| useEffect(() => { | |
| const timeoutID = setTimeout(() => { | |
| setDebouncedValue(value); | |
| }, delay); | |
| return () => clearTimeout(timeoutID); | |
| }, [value, delay]); | |
| return debouncedValue; | |
| }; | |
| const GitHubAvatar = () => { | |
| const [username, setUsername] = useState(""); | |
| const debouncedUsername = useDebounce(username, 250); | |
| const user = useGitHubUser(debouncedUsername); | |
| return ( | |
| <> | |
| <h1>React GitHub Avatar</h1> | |
| <div> | |
| <label htmlFor="username">Username: </label> | |
| <input | |
| name="username" | |
| placeholder="e.g. torvalds" | |
| value={username} | |
| onChange={(event) => setUsername(event.target.value)} | |
| /> | |
| </div> | |
| {user.id && ( | |
| <> | |
| <br /> | |
| <figure> | |
| <img | |
| style={{ width: 200 }} | |
| alt="User avatar" | |
| src={user.avatar_url} | |
| /> | |
| <figcaption> | |
| {user.name} | |
| <br /> | |
| <a | |
| href={`https://github.com/${user.login}`} | |
| target="_blank" | |
| >{`@${user.login}`}</a> | |
| </figcaption> | |
| </figure> | |
| </> | |
| )} | |
| </> | |
| ); | |
| }; | |
| ReactDOM.render(<GitHubAvatar />, document.getElementById("app")); |
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8" /> | |
| <title>GitHub Avatar</title> | |
| </head> | |
| <body> | |
| <div id="app"></div> | |
| <script | |
| src="https://unpkg.com/[email protected]/umd/react.production.min.js" | |
| crossorigin | |
| ></script> | |
| <script | |
| src="https://unpkg.com/[email protected]/umd/react-dom.production.min.js" | |
| crossorigin | |
| ></script> | |
| <script src="https://unpkg.com/@babel/[email protected]/babel.min.js"></script> | |
| <script type="text/babel" src="app.js"></script> | |
| </body> | |
| </html> |
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GistRun URL
https://gist.run/?id=8908dbbb14ee8655a9295b74a1c39e9d