isISO8601.js 2.1 KB

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  1. import assertString from './util/assertString';
  2. /* eslint-disable max-len */
  3. // from http://goo.gl/0ejHHW
  4. var iso8601 = /^([\+-]?\d{4}(?!\d{2}\b))((-?)((0[1-9]|1[0-2])(\3([12]\d|0[1-9]|3[01]))?|W([0-4]\d|5[0-3])(-?[1-7])?|(00[1-9]|0[1-9]\d|[12]\d{2}|3([0-5]\d|6[1-6])))([T\s]((([01]\d|2[0-3])((:?)[0-5]\d)?|24:?00)([\.,]\d+(?!:))?)?(\17[0-5]\d([\.,]\d+)?)?([zZ]|([\+-])([01]\d|2[0-3]):?([0-5]\d)?)?)?)?$/;
  5. // same as above, except with a strict 'T' separator between date and time
  6. var iso8601StrictSeparator = /^([\+-]?\d{4}(?!\d{2}\b))((-?)((0[1-9]|1[0-2])(\3([12]\d|0[1-9]|3[01]))?|W([0-4]\d|5[0-3])(-?[1-7])?|(00[1-9]|0[1-9]\d|[12]\d{2}|3([0-5]\d|6[1-6])))([T]((([01]\d|2[0-3])((:?)[0-5]\d)?|24:?00)([\.,]\d+(?!:))?)?(\17[0-5]\d([\.,]\d+)?)?([zZ]|([\+-])([01]\d|2[0-3]):?([0-5]\d)?)?)?)?$/;
  7. /* eslint-enable max-len */
  8. var isValidDate = function isValidDate(str) {
  9. // str must have passed the ISO8601 check
  10. // this check is meant to catch invalid dates
  11. // like 2009-02-31
  12. // first check for ordinal dates
  13. var ordinalMatch = str.match(/^(\d{4})-?(\d{3})([ T]{1}\.*|$)/);
  14. if (ordinalMatch) {
  15. var oYear = Number(ordinalMatch[1]);
  16. var oDay = Number(ordinalMatch[2]);
  17. // if is leap year
  18. if (oYear % 4 === 0 && oYear % 100 !== 0 || oYear % 400 === 0) return oDay <= 366;
  19. return oDay <= 365;
  20. }
  21. var match = str.match(/(\d{4})-?(\d{0,2})-?(\d*)/).map(Number);
  22. var year = match[1];
  23. var month = match[2];
  24. var day = match[3];
  25. var monthString = month ? "0".concat(month).slice(-2) : month;
  26. var dayString = day ? "0".concat(day).slice(-2) : day;
  27. // create a date object and compare
  28. var d = new Date("".concat(year, "-").concat(monthString || '01', "-").concat(dayString || '01'));
  29. if (month && day) {
  30. return d.getUTCFullYear() === year && d.getUTCMonth() + 1 === month && d.getUTCDate() === day;
  31. }
  32. return true;
  33. };
  34. export default function isISO8601(str) {
  35. var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
  36. assertString(str);
  37. var check = options.strictSeparator ? iso8601StrictSeparator.test(str) : iso8601.test(str);
  38. if (check && options.strict) return isValidDate(str);
  39. return check;
  40. }