1:  const buffer = new ArrayBuffer(4);

   2:  const view = new DataView(buffer);

   3:  view.setUint32(0, 12345, false); // Big-endian

   4:  

   5:  const byteArray = new Uint8Array(buffer);

   6:  const hexString = Array.from(byteArray).map(byte => byte.toString(16).padStart(2, '0')).join('');

   7:  console.log(hexString); // Output: "00003039"