fix(l10n): deepMerge

Author: abichinger

core/src/__tests__/util.spec.ts

@@ -13,5 +13,6 @@ describe('util', () => {
     expect(deepMerge({ a: { a: 1 } }, { a: { b: 1 }, b: 1 })).toEqual({ a: { a: 1, b: 1 }, b: 1 })
     expect(deepMerge({}, { a: { b: 1 } })).toEqual({ a: { b: 1 } })
     expect(deepMerge({ a: { b: 1 } }, { a: { b: 2 } })).toEqual({ a: { b: 2 } })
+    expect(deepMerge({ a: 1 }, { a: 2 }, { a: 3 })).toEqual({ a: 3 })
   })
 })

core/src/locale/index.ts

@@ -64,7 +64,8 @@ class Locale {
 function getLocale(localeCode: string, mixin?: Localization) {
   const [language] = localeCode.split('-')
   const l = locales[localeCode.toLowerCase()] || locales[language.toLowerCase()] || locales.en
-  const dict = deepMerge(locales.en, l, mixin || {}) as Localization
+  // Note: always use an empty object as target
+  const dict = deepMerge({}, locales.en, l, mixin || {}) as Localization
   return new Locale(dict)
 }
 

core/src/util.ts

@@ -157,7 +157,7 @@ function deepMerge(target: Object, ...sources: { [key: string]: any }[]) {
     }
   }
 
-  if (sources.length > 0) deepMerge(target, sources)
+  if (sources.length > 0) deepMerge(target, ...sources)
   return target
 }