duration

calculate

• absDuration: Return the absolute value of an ISO 8601 duration string.
• addDuration: Combine two ISO 8601 duration strings by addition.
• durationAs: Express an ISO 8601 duration as a single fractional total in one unit.
• getDurationSign: Report whether an ISO 8601 duration is negative, zero-length, or positive.
• getDurationUnit: Read a single component out of an ISO 8601 duration string.
• negateDuration: Flip the sign of an ISO 8601 duration string.
• subtractDuration: Combine two ISO 8601 duration strings by subtraction.

compare

• compareDurations: Compare two ISO 8601 duration strings by length.

format

• formatDuration: Render an ISO 8601 duration string as a locale-aware, human-readable string.

normalize

• normalizeDuration: Roll an ISO 8601 duration string’s small units into larger ones.

parse

• parseDuration: Parse and re-normalize an ISO 8601 duration string.

validate

• isValidDuration: Return true if value is a valid ISO 8601 duration string.