如何在typescript中将Blob类型转换为字节数组？

function blobToByteArray(blob: Blob): Promise<Uint8Array> {
  return new Promise((resolve, reject) => {
    const reader = new FileReader();
    reader.onloadend = () => {
      const arrayBuffer = reader.result as ArrayBuffer;
      const byteArray = new Uint8Array(arrayBuffer);
      resolve(byteArray);
    };
    reader.onerror = reject;
    reader.readAsArrayBuffer(blob);
  });
}

const blob = new Blob(["Hello, World!"], { type: "text/plain" });

blobToByteArray(blob)
  .then((byteArray) => {
    console.log(byteArray); // 输出字节数组
  })
  .catch((error) => {
    console.error(error); // 处理错误
  });