@rpldy/chunked-sender/lib/esm/chunkedSender/getChunks.js

adds chunked upload capabilities on top of the regular XHR uploads

import ChunkedSendError from "./ChunkedSendError";
const getChunks = (item, options, startByte = 0) => {
  const {
    chunkSize
  } = options;
  const size = startByte ? item.file.size - startByte : item.file.size;
  if (size <= 0) {
    throw new ChunkedSendError(`start byte ${startByte} is invalid. File size: ${item.file.size}`);
  }
  const count = size <= chunkSize ? 1 : Math.ceil(size / chunkSize);
  return new Array(count).fill(null).map((n, index) => {
    const start = chunkSize * index + (startByte || 0);
    return {
      id: `${item.id}_chunk-${index}`,
      start,
      end: Math.min(start + chunkSize, item.file.size),
      data: null,
      attempt: 0,
      uploaded: 0,
      index
    };
  });
};
export default getChunks;