position in chunk 1.9

position_chunk.js

const cursorInBits=getArrayPosition(pos)*this.bitsPerBlock;
const firstLongPosition=Math.floor(cursorInBits/64);
const shouldBePosition=(64-this.bitsPerBlock)-cursorInBits%64;
const positionInFirstLong=Math.max(shouldBePosition,0);
if(shouldBePosition<0)
{
  const lastLongPosition=firstLongPosition+1;
  const positionInLastLong=64+shouldBePosition;
}