breaking(unplugin-vue-i18n): deperecate around some options for Vue 2 (…

…#349)

packages/unplugin-vue-i18n/README.md

@@ -350,7 +350,10 @@ This plugin will automatically select and bundle `petite-vue-i18n` build accordi
 ### `jitCompilation`
 
 - **Type:** `boolean`
-- **Default:** `false`
+- **Default:** `true`
+
+> [!IMPORTANT]
+  'jitCompilation' option now defaults to `true` from 3.0.
 
   Whether locale mesages should be compiled by JIT (Just in Time) compilation with vue-i18n's message compiler.
 
@@ -374,10 +377,10 @@ Whether to tree-shake message compiler when we will be bundling.
 If do you will use this option, you need to enable `jitCompilation` option.
 
 > [!NOTE]
-> This option works with vue-i18n v9.3 and later.
+  This option works with vue-i18n v9.3 and later.
 
 > [!WARNING]
-> If you enable this option, **you should check  resources in your application are pre-compiled with this plugin.** If you will be loading resources dynamically from the back-end via the API, enabling this option do not work because there is not message compiler.
+  If you enable this option, **you should check resources in your application are pre-compiled with this plugin.** If you will be loading resources dynamically from the back-end via the API, enabling this option do not work because there is not message compiler.
 
 ### `ssr`
 
@@ -541,6 +544,9 @@ If do you will use this option, you need to enable `jitCompilation` option.
 - **Type:** `boolean`
 - **Default:** `false`
 
+> [!WARNING]
+  'bridge' option is deprecated, sinece Vue 2 was EOL on 2023. that option will be removed in 4.0.`
+
   The mode to birdge the i18n custom block to work in both [email protected] and [email protected] environments.
 
   To support in a smooth transition from [email protected] to [email protected], we provide a mode that bundles the i18n custom block to be available in either version.
@@ -553,6 +559,9 @@ If do you will use this option, you need to enable `jitCompilation` option.
 - **Type:** `boolean`
 - **Default:** `false`
 
+> [!WARNING]
+  'legacy' option is deprecated, sinece Vue 2 was EOL on 2023. that option will be removed in 4.0.`
+
   This option supports Vue I18n v8.x compatibility for resources in i18n custom blocks.
 
 > [!NOTE]
@@ -563,6 +572,9 @@ If do you will use this option, you need to enable `jitCompilation` option.
 - **Type:** `string`
 - **Default:** `undefined`
 
+> [!WARNING]
+  'vueVersion' option is deprecated, sinece Vue 2 was EOL on 2023. that option will be removed in 4.0.`
+
   The version of Vue that will be used by Vue I18n. This option is enabled when the `legacy` option is `true`.
 
   Available values are `'v2.6'` and `'v2.7'`.

packages/unplugin-vue-i18n/src/index.ts

@@ -44,6 +44,10 @@ const installedPkg = checkInstallPackage('@intlify/unplugin-vue-i18n', debug)
 const installedVueI18nBridge = checkVueI18nBridgeInstallPackage(debug)
 const vueI18nVersion = getVueI18nVersion(debug)
 
+if (vueI18nVersion === '8') {
+  warn(`vue-i18n@8 is not supported, since sinece Vue 2 was EOL on 2023.`)
+}
+
 export const unplugin = createUnplugin<PluginOptions>((options = {}, meta) => {
   debug('plugin options:', options, meta.framework)
 
@@ -83,21 +87,39 @@ export const unplugin = createUnplugin<PluginOptions>((options = {}, meta) => {
 
   const bridge = !!options.bridge
   debug('bridge', bridge)
+  if (bridge) {
+    warn(
+      `'bridge' option is deprecated, sinece Vue 2 was EOL on 2023. that option will be removed in 4.0.`
+    )
+  }
 
   const legacy = !!options.legacy
   debug('legacy', legacy)
+  if (legacy) {
+    warn(
+      `'legacy' option is deprecated, sinece Vue 2 was EOL on 2023. that option will be removed in 4.0.`
+    )
+  }
 
   const vueVersion = isString(options.vueVersion)
     ? options.vueVersion
     : undefined
+  if (!vueVersion) {
+    warn(
+      `'vueVersion' option is deprecated, sinece Vue 2 was EOL on 2023. that option will be removed in 4.0.`
+    )
+  }
 
   const runtimeOnly = isBoolean(options.runtimeOnly)
     ? options.runtimeOnly
     : true
   debug('runtimeOnly', runtimeOnly)
 
-  const jitCompilation = !!options.jitCompilation
+  const jitCompilation = isBoolean(options.jitCompilation)
+    ? options.jitCompilation
+    : true
   debug('jitCompilation', jitCompilation)
+
   const dropMessageCompiler = jitCompilation
     ? !!options.dropMessageCompiler
     : false