js

const d1 = Temporal.Duration.from({ weeks: 1, days: 1 });
const d2 = Temporal.Duration.from({ weeks: -1, days: -1 });
const d3 = Temporal.Duration.from({ weeks: 1 });
const d4 = Temporal.Duration.from({ days: 7 });

console.log(d1.days); // 1
console.log(d2.days); // -1
console.log(d3.days); // 0
console.log(d4.days); // 7

// Balance d4
const d4Balanced = d4.round({
  largestUnit: "weeks",
  relativeTo: Temporal.PlainDate.from("2021-01-01"), // ISO 8601 calendar
});
console.log(d4Balanced.days); // 0
console.log(d4Balanced.weeks); // 1