expo image upload in both web and mobile

convertBase64ToFileInWeb.ts

const fileName = uri.split('/').pop();
const fileType = mime.getType(uri);
const data: FormData = new FormData();

if (Platform.OS === 'web') {
  const byteString = atob(uri.split(',')[1]);

  const ab = new ArrayBuffer(byteString.length);
  const arr = new Uint8Array(ab);

  for (let i = 0; i < byteString.length; i++)
    arr[i] = byteString.charCodeAt(i);

  const blob = new Blob([arr], {
    type: fileType || 'image/png',
  });

  const file = new File([blob], `${fileName}${fileNamePrefix}`);

  data.append('inputFile', file);
} else
  data.append('inputFile', {
    uri,
    type: fileType || 'image/png',
    name: `${fileName}${fileNamePrefix}`,
  });

const fetchOption = {
  method: 'POST',
  body: data,
  headers: Platform.select({
    web: {
      Accept: 'application/json',
      Authorization: `Bearer ${token}`,
    },
    default: {
      Accept: 'application/json',
      'Content-Type': 'multipart/form-data',
      Authorization: `Bearer ${token}`,
    },
  }),
};