Function isValid

tests/test_code/js/moment/moment.js:156–190

(m)

    }

    function isValid(m) {
        if (m._isValid == null) {
            var flags = getParsingFlags(m),
                parsedParts = some.call(flags.parsedDateParts, function (i) {
                    return i != null;
                }),
                isNowValid =
                    !isNaN(m._d.getTime()) &&
                    flags.overflow < 0 &&
                    !flags.empty &&
                    !flags.invalidEra &&
                    !flags.invalidMonth &&
                    !flags.invalidWeekday &&
                    !flags.weekdayMismatch &&
                    !flags.nullInput &&
                    !flags.invalidFormat &&
                    !flags.userInvalidated &&
                    (!flags.meridiem || (flags.meridiem && parsedParts));

            if (m._strict) {
                isNowValid =
                    isNowValid &&
                    flags.charsLeftOver === 0 &&
                    flags.unusedTokens.length === 0 &&
                    flags.bigHour === undefined;
            }

            if (Object.isFrozen == null || !Object.isFrozen(m)) {
                m._isValid = isNowValid;
            } else {
                return isNowValid;
            }
        }
        return m._isValid;
    }

    function createInvalid(flags) {
        var m = createUTC(NaN);