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Bun 实现了 Web 标准的 fetch API 用于发送 HTTP 请求。要向一个 URL 发送一个简单的 GET 请求：
https://mintcdn.com/ikxin/RzFFGbzo0-4huILA/icons/typescript.svg?fit=max&auto=format&n=RzFFGbzo0-4huILA&q=85&s=a3dffd2241f05776d3bd25171d0c5a79fetch.ts
const response = await fetch("https://bun.com");
const html = await response.text(); // HTML 字符串
向 API 端点发送 POST 请求。
https://mintcdn.com/ikxin/RzFFGbzo0-4huILA/icons/typescript.svg?fit=max&auto=format&n=RzFFGbzo0-4huILA&q=85&s=a3dffd2241f05776d3bd25171d0c5a79fetch.ts
const response = await fetch("https://bun.com/api", {
  method: "POST",
  body: JSON.stringify({ message: "Hello from Bun!" }),
  headers: { "Content-Type": "application/json" },
});

const body = await response.json();