bc518174
 王天杨
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import { toDate } from "./toDate.mjs";
/**
* The {@link interval} function options.
*/
/**
* @name interval
* @category Interval Helpers
* @summary Creates an interval object and validates its values.
*
* @description
* Creates a normalized interval object and validates its values. If the interval is invalid, an exception is thrown.
*
* @typeParam DateType - The `Date` type, the function operates on. Gets inferred from passed arguments. Allows to use extensions like [`UTCDate`](https://github.com/date-fns/utc).
*
* @param start - The start of the interval.
* @param end - The end of the interval.
* @param options - The options object.
*
* @throws `Start date is invalid` when `start` is invalid.
* @throws `End date is invalid` when `end` is invalid.
* @throws `End date must be after start date` when end is before `start` and `options.assertPositive` is true.
*
* @returns The normalized and validated interval object.
*/
export function interval(start, end, options) {
const _start = toDate(start);
if (isNaN(+_start)) throw new TypeError("Start date is invalid");
const _end = toDate(end);
if (isNaN(+_end)) throw new TypeError("End date is invalid");
if (options?.assertPositive && +_start > +_end)
throw new TypeError("End date must be after start date");
return { start: _start, end: _end };
}
// Fallback for modularized imports:
export default interval;
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