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@burglekitt/gmt

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Temporal-based date and time utilities with timezone support and polyfill integration

github.com/burglekitt/gmt

burglekitt/gmt

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/** * Return true if `start` and `end` form a valid datetime interval — both parseable as * ISO PlainDateTime strings and `start <= end`. * * - Both inputs must be ISO 8601 datetime strings (e.g. `"2024-01-01T10:00:00"`). * - Equal `start === end` is valid. * - Invalid input, malformed strings, or leap-second strings return `false`. * * @param start ISO 8601 datetime string (interval start) * @param end ISO 8601 datetime string (interval end) * @returns true if start and end form a valid datetime interval, or false on invalid input * * @example isValidDateTimeInterval("2024-01-01T10:00:00", "2024-12-31T23:59:59") // true * @example isValidDateTimeInterval("2024-01-01T10:00:00", "2024-01-01T10:00:00") // true * @example isValidDateTimeInterval("2024-12-31T23:59:59", "2024-01-01T10:00:00") // false * @example isValidDateTimeInterval("invalid", "2024-12-31T23:59:59") // false */ export declare function isValidDateTimeInterval(start: string, end: string): boolean;