Combining RequireJS with Bootstrap Datepicker and Locale Files

I have made the decision to transition our project to modules, and while most components are functioning properly, some are experiencing issues, particularly with localization files. Resolving this example issue would likely help me address other issues within the project.

Currently, I am using the Bootstrap Datepicker plugin from

In my RequireJS configuration:

 require.config({
   baseUrl: "Scripts",    
   paths: {
        ... including dependencies like jquery and jquery-ui...
        "bootstrap-datepicker": "bootstrap-datepicker",
        "bootstrap-datepicker-de": "./locales/bootstrap-datepicker.de",     
   }
   shim: {
    'bootstrap-datepicker-de': ['bootstrap-datepicker']
   }
});

Within App.ts:

... importing dependencies such as jquery and jquery-ui...
import "bootstrap-datepicker";
import "bootstrap-datepicker-de";
... initializing App ...

The content of bootstrap-datepicker.de.js is as follows:

    ; (function ($) {
    $.fn.datepicker.dates['de'] = {
        days: ["Sonntag", "Montag", "Dienstag", "Mittwoch", "Donnerstag", "Freitag", "Samstag"],
        daysShort: ["Son", "Mon", "Die", "Mit", "Don", "Fre", "Sam"],
        daysMin: ["So", "Mo", "Di", "Mi", "Do", "Fr", "Sa"],
        months: ["Januar", "Februar", "März", "April", "Mai", "Juni", "Juli", "August", "September", "Oktober", "November", "Dezember"],
        monthsShort: ["Jan", "Feb", "Mär", "Apr", "Mai", "Jun", "Jul", "Aug", "Sep", "Okt", "Nov", "Dez"],
        today: "Heute",
        monthsTitle: "Monate",
        clear: "Löschen",
        weekStart: 1,
        format: "dd.mm.yyyy"
    };
}(jQuery));

Upon loading the page, an error is encountered:

bootstrap-datepicker.de.js:7 Uncaught TypeError: Cannot set property 'de' of undefined
at bootstrap-datepicker.de.js:7
at bootstrap-datepicker.de.js:19
typescriptlocalizationrequirejsbootstrap-datepicker

Answer №1

We encountered a similar issue and successfully resolved it by relocating this code to the constructor of our viewmodel

$(document).ready(() => {
        (function($){
            (<any>$.fn.datepicker).dates['de'] = {
                days: ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"],
                daysShort: ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"],
                daysMin: ["Su", "Mo", "Tu", "We", "Th", "Fr", "Sa"],
                months: ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"],
                monthsShort: ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"],
                today: "Today",
                monthsTitle: "Months",
                clear: "Clear",
                weekStart: 1,
                format: "dd.mm.yyyy"
            };
        }($));

        $('#date').datepicker({
            format: 'dd.mm.yyyy',
            autoclose: true,

            language: "de",

            orientation: 'left bottom'
        });
    });

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