feat: change globalInjection option default value (#974)

* feat: change `globalInjection` option default value

* refactor: unit tests

Author: kazupon

docs/guide/advanced/composition.md

@@ -311,6 +311,10 @@ Another way to refer a global scope Composer instance is through properties and
 
 You need to specify **`globalInjection: true`** together with `legacy: false` as an option for `createI18n`, because disabled by default.
 
+:::tip NOTE
+vue-i18n v9.2-beta.34 or later, `globalInjection` is `true` by default.
+:::
+
 This allows Vue I18n to inject the following properties and functions into the components:
 
 - `$i18n`: An object wrapped with the following global scope Composer instance properties

docs/ja/guide/advanced/composition.md

@@ -311,6 +311,10 @@ Another way to refer a global scope Composer instance is through properties and
 
 You need to specify **`globalInjection: true`** together with `legacy: false` as an option for `createI18n`, because disabled by default.
 
+:::tip NOTE
+vue-i18n v9.2-beta.34 or later, `globalInjection` is `true` by default.
+:::
+
 This allows Vue I18n to inject the following properties and functions into the components:
 
 - `$i18n`: An object wrapped with the following global scope Composer instance properties

packages/vue-i18n-core/src/i18n.ts

@@ -156,7 +156,7 @@ export interface I18nAdditionalOptions {
    * @VueI18nSee [Implicit with injected properties and functions](../guide/advanced/composition#implicit-with-injected-properties-and-functions)
    * @VueI18nSee [ComponentCustomProperties](injection#componentcustomproperties)
    *
-   * @defaultValue `false`
+   * @defaultValue `true`
    */
   globalInjection?: boolean
   /**
@@ -482,9 +482,7 @@ export function createI18n(options: any = {}, VueI18nLegacy?: any): any {
       ? options.legacy
       : __FEATURE_LEGACY_API__
   // prettier-ignore
-  const __globalInjection = /* #__PURE__*/ !__BRIDGE__
-    ? !!options.globalInjection
-    : isBoolean(options.globalInjection)
+  const __globalInjection = isBoolean(options.globalInjection)
       ? options.globalInjection
       : true
   // prettier-ignore

packages/vue-i18n-core/test/issues.test.ts

@@ -169,7 +169,6 @@ describe('issue #722', () => {
 
     const i18n = createI18n({
       legacy: false,
-      globalInjection: true,
       locale: 'en',
       messages
     })
@@ -245,7 +244,6 @@ describe('issue #722', () => {
 
     const i18n = createI18n({
       legacy: false,
-      globalInjection: true,
       locale: 'en',
       messages
     })
@@ -363,7 +361,6 @@ describe('issue #853', () => {
       legacy: false,
       locale: 'en',
       fallbackLocale: 'en',
-      globalInjection: true,
       warnHtmlMessage: false,
       messages: {
         en: {