isValidTimeInterval

Signature

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

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

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.

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

isValidTimeInterval("09:00:00", "17:00:00") // true
isValidTimeInterval("12:00:00", "12:00:00") // true
isValidTimeInterval("17:00:00", "09:00:00") // false
isValidTimeInterval("invalid", "12:00:00") // false

Source

plain/interval/validate/isValidTimeInterval.ts