Offset (with limit) calculation / validation

offset.js

function offset(count, offset, limit) {
  const finalOffset = Math.max(Math.min(count, offset), 0);
  const remainedCount = Math.min(count, count - finalOffset);
  const finalCount = (typeof limit === 'number') ? Math.min(limit, remainedCount) : remainedCount;
  return { offset: finalOffset, finalCount: finalCount };
}

console.log(offset(10, 0)); // {"offset":0,"finalCount":10}
console.log(offset(10, 4)); // {"offset":4,"finalCount":6}
console.log(offset(10, 10)); // {"offset":10,"finalCount":0}
console.log(offset(10, 10)); // {"offset":10,"finalCount":0}
console.log(offset(10, 15)); // {"offset":10,"finalCount":0}
console.log(offset(10, 10)); // {"offset":10,"finalCount":0}
console.log(offset(10, 3, 5)); // {"offset":3,"finalCount":5}
console.log(offset(10, 2, 10)); // {"offset":2,"finalCount":8}