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+import toDate from "../toDate/index.js";
+import isValid from "../isValid/index.js";
+import addLeadingZeros from "../_lib/addLeadingZeros/index.js";
+import toInteger from "../_lib/toInteger/index.js";
+/**
+ * @name formatRFC3339
+ * @category Common Helpers
+ * @summary Format the date according to the RFC 3339 standard (https://tools.ietf.org/html/rfc3339#section-5.6).
+ *
+ * @description
+ * Return the formatted date string in RFC 3339 format. Options may be passed to control the parts and notations of the date.
+ *
+ * @param {Date|Number} date - the original date
+ * @param {Object} [options] - an object with options.
+ * @param {0|1|2|3} [options.fractionDigits=0] - number of digits after the decimal point after seconds
+ * @returns {String} the formatted date string
+ * @throws {TypeError} 1 argument required
+ * @throws {RangeError} `date` must not be Invalid Date
+ * @throws {RangeError} `options.fractionDigits` must be between 0 and 3
+ *
+ * @example
+ * // Represent 18 September 2019 in RFC 3339 format:
+ * const result = formatRFC3339(new Date(2019, 8, 18, 19, 0, 52))
+ * //=> '2019-09-18T19:00:52Z'
+ *
+ * @example
+ * // Represent 18 September 2019 in RFC 3339 format, 2 digits of second fraction:
+ * const result = formatRFC3339(new Date(2019, 8, 18, 19, 0, 52, 234), { fractionDigits: 2 })
+ * //=> '2019-09-18T19:00:52.23Z'
+ *
+ * @example
+ * // Represent 18 September 2019 in RFC 3339 format, 3 digits of second fraction
+ * const result = formatRFC3339(new Date(2019, 8, 18, 19, 0, 52, 234), { fractionDigits: 3 })
+ * //=> '2019-09-18T19:00:52.234Z'
+ */
+export default function formatRFC3339(dirtyDate, options) {
+ var _options$fractionDigi;
+ if (arguments.length < 1) {
+ throw new TypeError("1 arguments required, but only ".concat(arguments.length, " present"));
+ }
+ var originalDate = toDate(dirtyDate);
+ if (!isValid(originalDate)) {
+ throw new RangeError('Invalid time value');
+ }
+ var fractionDigits = Number((_options$fractionDigi = options === null || options === void 0 ? void 0 : options.fractionDigits) !== null && _options$fractionDigi !== void 0 ? _options$fractionDigi : 0);
+
+ // Test if fractionDigits is between 0 and 3 _and_ is not NaN
+ if (!(fractionDigits >= 0 && fractionDigits <= 3)) {
+ throw new RangeError('fractionDigits must be between 0 and 3 inclusively');
+ }
+ var day = addLeadingZeros(originalDate.getDate(), 2);
+ var month = addLeadingZeros(originalDate.getMonth() + 1, 2);
+ var year = originalDate.getFullYear();
+ var hour = addLeadingZeros(originalDate.getHours(), 2);
+ var minute = addLeadingZeros(originalDate.getMinutes(), 2);
+ var second = addLeadingZeros(originalDate.getSeconds(), 2);
+ var fractionalSecond = '';
+ if (fractionDigits > 0) {
+ var milliseconds = originalDate.getMilliseconds();
+ var fractionalSeconds = Math.floor(milliseconds * Math.pow(10, fractionDigits - 3));
+ fractionalSecond = '.' + addLeadingZeros(fractionalSeconds, fractionDigits);
+ }
+ var offset = '';
+ var tzOffset = originalDate.getTimezoneOffset();
+ if (tzOffset !== 0) {
+ var absoluteOffset = Math.abs(tzOffset);
+ var hourOffset = addLeadingZeros(toInteger(absoluteOffset / 60), 2);
+ var minuteOffset = addLeadingZeros(absoluteOffset % 60, 2);
+ // If less than 0, the sign is +, because it is ahead of time.
+ var sign = tzOffset < 0 ? '+' : '-';
+ offset = "".concat(sign).concat(hourOffset, ":").concat(minuteOffset);
+ } else {
+ offset = 'Z';
+ }
+ return "".concat(year, "-").concat(month, "-").concat(day, "T").concat(hour, ":").concat(minute, ":").concat(second).concat(fractionalSecond).concat(offset);
+} \ No newline at end of file
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