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Weird behaviour with DateTime toLocaleString and DateTime fromFormat

See original GitHub issue

Describe the bug We can generate a string with a certain locale, but we can’t parse it.

To Reproduce

 luxon.DateTime.local().reconfigure({ locale: "es-ES"}).toLocaleString({
            ...luxon.DateTime.TIME_SIMPLE,
            hourCycle: "h12"
        });

// '7:42 p. m.'

luxon.DateTime.fromFormat("02:00 a. m.", "hh:mm a", {locale: "es-ES", numberingSystem: "latin"});

// Invalid date time with reason: the input \"02:00 a. m.\" can't be parsed as format [object Object]

Actual vs Expected behavior

I guess it would make sense it worked both ways

Desktop (please complete the following information):

OS: Win 11
Browser: Chrome 107.0.5304.122
Luxon version: 3.1.1
Your timezone: “Europe/Rome”

Additional context Add any other context about the problem here.

Issue Analytics

State:
Created 10 months ago
Comments:5

Top GitHub Comments

1reaction

diesieben07commented, Dec 6, 2022

You’re looking for the latn numbering system. latin is not a valid option here. This input should probably be validated. You can find the list of valid numbering systems on MDN: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/Locale/numberingSystem

0reactions

tonysampericommented, Dec 6, 2022

@diesieben07

Thanks! No worries, though! It’s proven to work…I just have to deal with some legacy code which for no apparent reason defaults to parsing in us locale… Btw before opening this, I bypassed the issue transforming any weird representation of the meridiem to AM or PM… But I’ll see if I can do something cleaner!

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toLocaleString ({ ...luxon.DateTime.TIME_SIMPLE, hourCycle: "h12" }); // '7:42 p. m.' luxon.DateTime.fromFormat("02:00 a. m.", "hh:mm a", ...