Moment.js display hour in local format

Question

I guess this is quite simple question, but I am currently unable to find it in moment's documentation. I have to display just an hour in local format, e.g.

• for locale en-gb: 14
• for locale en-us: 2 PM

The closest format I've found is LT, but it also displays minutes that are not desired...

Here is what I tried:

moment().format('LT'); // 14:00 / 2:00 PM
// I need some kind of combination of these two:
moment().format('H'); // 14
moment().format('h A'); // 2 PM

Is there a moment-way to achieve it or am I forced to use a work-around like below?

moment().format('LT').replace(/:[0-9]{2}/, '');

Answer 1

There is no built-in method in momentjs 2.18.1 to get the localized input you are looking for. The localized formats availables that include time are:

Time                                               | LT    | 8:30 PM
Time with seconds                                  | LTS   | 8:30:25 PM
Month name, day of month, day of week, year, time  | LLLL  | Thursday, September 4 1986 8:30 PM
                                                   | llll  | Thu, Sep 4 1986 8:30 PM

So you probably have to use a work around like you showed in the question. The following script creates and displays a Map with the number of occurences for each LT string. It uses localeData and longDateFormat to get localized format for LT.

let formatMap = new Map();

['af' , 'ar-dz', 'ar-kw', 'ar-ly', 'ar-ma', 'ar-sa', 'ar-tn', 'ar', 'az', 'be', 'bg', 'bn', 'bo', 'br', 'bs', 'ca', 'cs', 'cv', 'cy', 'da', 'de-at', 'de-ch', 'de', 'dv', 'el', 'en-au', 'en-ca', 'en-gb', 'en-ie', 'en-nz', 'eo', 'es-do', 'es', 'et', 'eu', 'fa', 'fi', 'fo', 'fr-ca', 'fr-ch', 'fr', 'fy', 'gd', 'gl', 'gom-latn', 'he', 'hi', 'hr', 'hu', 'hy-am', 'id', 'is', 'it', 'ja', 'jv', 'ka', 'kk', 'km', 'kn', 'ko', 'ky', 'lb', 'lo', 'lt', 'lv', 'me', 'mi', 'mk', 'ml', 'mr', 'ms-my', 'ms', 'my', 'nb', 'ne', 'nl-be', 'nl', 'nn', 'pa-in', 'pl', 'pt-br', 'pt', 'ro', 'ru', 'sd', 'se', 'si', 'sk', 'sl', 'sq', 'sr-cyrl', 'sr', 'ss', 'sv', 'sw', 'ta', 'te', 'tet', 'th', 'tl-ph', 'tlh', 'tr', 'tzl', 'tzm-latn', 'tzm', 'uk', 'ur', 'uz-latn', 'uz', 'vi', 'x-pseudo', 'yo', 'zh-cn', 'zh-hk', 'zh-tw'].forEach(localeName => {
  var format =  moment.localeData(localeName).longDateFormat('LT');
  
  if( formatMap.has(format) ){
    let val = formatMap.get(format);
    formatMap.set(format, val+1);
  } else {
    formatMap.set(format, 1);
  }
  
});

console.log(formatMap);

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.18.1/moment-with-locales.min.js"></script>

Note that breton (br) locale uses h[e]mm A format and there are 7 locales (including: German (Switzerland) de-ch, Finnish fi, Indonesian id, etc) that use HH.mm.

Those cases are not covered by your workaround, maybe you can use something like:

moment().format('LT').replace(/(:|\.)[0-9]{2}/, '');

or

moment().format('LT').replace(/(:|\.|e)[0-9]{2}/, '');

to get the desired output for these locales.