fix: Add property check before updating shorthand for english locale

Signed-off-by: Akshat Patel <akshat@live.ca>

Author: Akshat55

src/datepicker/datepicker.component.ts

@@ -13,26 +13,33 @@ import {
 	AfterViewChecked,
 	AfterViewInit,
 	ViewChild,
-	AfterContentInit,
 	OnInit,
 	SimpleChange
 } from "@angular/core";
 import rangePlugin from "flatpickr/dist/plugins/rangePlugin";
 import flatpickr from "flatpickr";
 import { NG_VALUE_ACCESSOR } from "@angular/forms";
 import { carbonFlatpickrMonthSelectPlugin } from "./carbon-flatpickr-month-select";
-import languages from "flatpickr/dist/l10n/index";
+import * as languages from "flatpickr/dist/l10n/index";
 import { DatePickerInput } from "carbon-components-angular/datepicker-input";
 import { I18n } from "carbon-components-angular/i18n";
 
-// Due to type error, we have to use square brackets property accessor
-(languages.default["en"].weekdays.shorthand as string[])
-= languages.default["en"].weekdays.longhand.map(day => {
-	if (day === "Thursday") {
-		return "Th";
-	}
-	return day.charAt(0);
-});
+/**
+ * Due to type error, we have to use square brackets property accessor
+ * There is a webpack issue when attempting to access exported languages from flatpickr l10n Angular 14+ apps
+ * languages.default[locale] fails in app consuming CCA library but passes in test
+ * languages.default.default[locale] fails in test but works in app consuming CCA library.
+ *
+ * To please both scenarios, we are adding a condition to prevent tests from failing
+ */
+if (languages.default?.default["en"]?.weekdays) {
+	(languages.default.default["en"].weekdays.shorthand as string[]) = languages.default.default["en"].weekdays.longhand.map(day => {
+		if (day === "Thursday") {
+			return "Th";
+		}
+		return day.charAt(0);
+	});
+}
 
 /**
  * [See demo](../../?path=/story/components-date-picker--single)
@@ -221,7 +228,7 @@ export class DatePicker implements
 			mode: this.range ? "range" : "single",
 			plugins,
 			dateFormat: this.dateFormat,
-			locale: languages.default[this.language]
+			locale: languages.default?.default[this.language] || languages.default[this.language]
 		});
 	}