@videojs/http-streaming/src/util/segment.js

/**
 * Combine all segments into a single Uint8Array
 *
 * @param {Object} segmentObj
 * @return {Uint8Array} concatenated bytes
 * @private
 */
export const concatSegments = (segmentObj) => {
  let offset = 0;
  let tempBuffer;

  if (segmentObj.bytes) {
    tempBuffer = new Uint8Array(segmentObj.bytes);

    // combine the individual segments into one large typed-array
    segmentObj.segments.forEach((segment) => {
      tempBuffer.set(segment, offset);
      offset += segment.byteLength;
    });
  }

  return tempBuffer;
};