Discuss common patterns and tools for fetching data from and sending data to backend services in React applications.
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01
Understand the problem
apidata fetchinguseeffectaxios
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Attempt it yourself
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03
Study the solution
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Read the code
A small typed API client
const BASE = "https://api.example.com"; // from import.meta.env in real apps
async function api(path, options = {}) {
const res = await fetch(BASE + path, {
headers: { "Content-Type": "application/json", ...options.headers },
...options,
});
if (!res.ok) throw new Error("HTTP " + res.status);
return res.json();
}
import { useState } from "react";
export default function App() {
const [user, setUser] = useState(null);
const load = () => api("/users/1").then(setUser).catch(console.error);
return (
<div style={{ padding: 24, fontFamily: "system-ui" }}>
<button onClick={load}>Load user</button>
<pre>{user && JSON.stringify(user, null, 2)}</pre>
</div>
);
}05
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