isValidTimeInterval

Signature

isValidTimeInterval(start: string, end: string): boolean

Return true if start and end form a valid time interval — both parseable as ISO PlainTime strings and start <= end.

• Both inputs must be ISO 8601 time strings (e.g. "14:30:00").
• Equal start === end is valid.
• Invalid input, malformed strings, or leap-second strings return false.
• Each endpoint must satisfy isValidTime, so annotations are read as Temporal reads them: a time zone annotation ([Europe/Paris]), [u-ca=iso8601] and an elective annotation ([foo=bar]) are ignored; an unknown critical annotation ([!foo=bar]) is rejected.

Parameters

Parameter	Type	Description
start	string	ISO 8601 time string (interval start)
end	string	ISO 8601 time string (interval end)

Returns

true if start and end form a valid time interval, or false on invalid input

Examples

import { isValidTimeInterval } from "@northguild/gmt/plain/interval";

isValidTimeInterval("09:00:00", "17:00:00") // true

startend

output

 

Source

plain/interval/validate/isValidTimeInterval.ts