The Angular application is configured with distinct locales for debugging and for running

In my application, there is a calendar feature that displays a string representation of a timestamp. When selecting a date from a date picker (using date-fns and angular-calendar), I make a POST request in my service.

postWorkingSlot(workingSlot: NewWorkingSlot, selectedOperativeID: number)
{
    let util = new Util();
    workingSlot.starting_time = util.formatDateString(workingSlot.starting_time)
    workingSlot.ending_time = util.formatDateString(workingSlot.ending_time)
    const body = JSON.stringify(workingSlot);
    console.log('Timestamp added : ', body);
    return this.http.post((endpoint + "/" + "api/v1/professional/availability_slot/" + selectedOperativeID ), body, this.httpOptions);
}

I use a utility function because formatTime() has issues with 12/24h representation. However, I noticed a strange behavior where the same date (let's say July 2nd) outputs differently when running in debug mode - 2022-07-02T09:00:00.000+00:00 versus running with ng serve - 2022-02-07T09:00:00.000+00:00. You can observe this discrepancy in the console screenshots: https://i.sstatic.net/gsAhj.png https://i.sstatic.net/Sxp5B.png

The error highlighted in the first screenshot showing the 15th month (July) indicates a failure due to incorrect formatting. I suspect that there may be an issue with the locale settings, but what could it be? What am I overlooking here?

Thank you for your time.

javascriptangulartypescripttimestampangular-calendar

Answer №1

When converting a date to string, the formatting will depend on the locale settings. For example, a Greek locale will display dates as dd/MM/yyyy, while in the US it will be MM/dd/yyyy. To ensure consistent formatting, either specify the format during conversion (e.g., dd/MM/yyyy) or adjust the locale settings in your Angular app. https://angular.io/guide/i18n-optional-manual-runtime-locale

Avoid converting back and forth between strings and dates. Stick to using ISO date format for all operations (yyyy/MM/dd HH:mm:ss).

When sending data to a REST API, always convert dates to strings using the ISO format to avoid issues related to changing locales.

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