cool fetch

a.js

function myCoolFetch(url: string): Promise<Response> {
  // Simulating an asynchronous operation
  return new Promise<Response>((resolve, reject) => {
    // Simulating a delay before resolving the promise
    setTimeout(() => {
      // Create a mock response object
      const response: Response = {
        status: 200,
        statusText: "OK",
        ok: true,
        redirected: false,
        type: "basic",
        url: url,
        clone: () => response,
        body: null,
        bodyUsed: false,
        blob: () => Promise.resolve(new Blob()),
        formData: () => Promise.resolve(new FormData()),
        arrayBuffer: () => Promise.resolve(new ArrayBuffer(0)),
        headers: new Headers(),
        // headers: {
        //   "Content-Type": "application/json",
        // },
        text: () =>
          Promise.resolve(JSON.stringify({ message: "Hello, world!" })),
        json: () => Promise.resolve({ message: "Hello, world!" }),
      };

      // Resolve the promise with the mock response
      resolve(response);
    }, 1000);
  });
}