feat!: change $t overloaded signature for Legacy API mode (#1832)

* breaking: change `$t` overloaded signature for Legacy API mode

* fix: typo

* chore: add node v22

Author: kazupon

.github/workflows/ci.yml

@@ -83,7 +83,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
-        node: [18.19, 20]
+        node: [18.19, 20, 22]
 
     runs-on: ${{ matrix.os }}
 
@@ -144,7 +144,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
-        node: [18.19, 20]
+        node: [18.19, 20, 22]
 
     runs-on: ${{ matrix.os }}
 

docs/.vitepress/config.mts

@@ -195,11 +195,15 @@ function sidebarGuide() {
       collapsible: true,
       items: [
         {
-          text: 'Breaking Changes',
+          text: 'Breaking Changes in v9',
           link: '/guide/migration/breaking'
         },
         {
-          text: 'New Features',
+          text: 'Breaking Changes in v10',
+          link: '/guide/migration/breaking10'
+        },
+        {
+          text: 'New Features in v9',
           link: '/guide/migration/features'
         },
         {

docs/api/injection.md

@@ -90,6 +90,10 @@ Translation message
 
 ### $t(key, locale)
 
+:::danger NOTICE
+**This API signature is available in Legacy API mode only and is supported until v9**.
+:::
+
 Locale message translation
 
 **Signature:**
@@ -113,6 +117,10 @@ Translation message
 
 ### $t(key, locale, list)
 
+:::danger NOTICE
+**This API signature is available in Legacy API mode only and is supported until v9**.
+:::
+
 Locale message translation
 
 **Signature:**
@@ -137,6 +145,10 @@ Translation message
 
 ### $t(key, locale, named)
 
+:::danger NOTICE
+**This API signature is available in Legacy API mode only and is supported until v9**.
+:::
+
 Locale message translation
 
 **Signature:**
@@ -159,86 +171,17 @@ Overloaded `$t`. About details, see the [$t](injection#t-key) remarks.
 
 Translation message
 
-### $t(key, list)
-
-Locale message translation
-
-**Signature:**
-```typescript
-$t(key: Path, list: unknown[]): TranslateResult;
-```
-
-**Details**
-
-Overloaded `$t`. About details, see the [$t](injection#t-key) remarks.
-
-#### Parameters
-| Parameter | Type | Description |
-| --- | --- | --- |
-| key | Path | A target locale message key |
-| list | unknown[] | A values of list interpolation |
-
-#### Returns
-
-Translation message
-
-### $t(key, named)
-
-Locale message translation
-
-**Signature:**
-```typescript
-$t(key: Path, named: Record<string, unknown>): TranslateResult;
-```
-
-**Details**
-
-Overloaded `$t`. About details, see the [$t](injection#t-key) remarks.
-
-#### Parameters
-| Parameter | Type | Description |
-| --- | --- | --- |
-| key | Path | A target locale message key |
-| locale | Locale | A locale, override locale that global scope or local scope |
-| named | Record&lt;string, unknown&gt; | A values of named interpolation |
-
-#### Returns
-
-Translation message
-
-### $t(key)
-
-Locale message translation
-
-**Signature:**
-```typescript
-$t(key: Path): string;
-```
-
-**Details**
-
-Overloaded `$t`. About details, see the [$t](injection#t-key) remarks.
-
-#### Parameters
-| Parameter | Type | Description |
-| --- | --- | --- |
-| key | Path | A target locale message key |
-
-#### Returns
-
-Translation message
-
 ### $t(key, plural)
 
 Locale message translation
 
 **Signature:**
 ```typescript
-$t(key: Path, plural: number): string;
+$t(key: Path, plural: number): TranslateResult;
 ```
 
 :::tip NOTE
-Supported for **Composition API mode only**.
+Supported for **Composition API mode only until v9. v10 or later can also be used in Legacy API mode**.
 :::
 
 **Details**
@@ -261,11 +204,11 @@ Locale message translation
 
 **Signature:**
 ```typescript
-$t(key: Path, plural: number, options: TranslateOptions): string;
+$t(key: Path, plural: number, options: TranslateOptions): TranslateResult;
 ```
 
 :::tip NOTE
-Supported for **Composition API mode only**.
+Supported for **Composition API mode only until v9. v10 or later can also be used in Legacy API mode**.
 :::
 
 **Details**
@@ -289,11 +232,11 @@ Locale message translation
 
 **Signature:**
 ```typescript
-$t(key: Path, defaultMsg: string): string;
+$t(key: Path, defaultMsg: string): TranslateResult;
 ```
 
 :::tip NOTE
-Supported for **Composition API mode only**.
+Supported for **Composition API mode only until v9. v10 or later can also be used in Legacy API mode**.
 :::
 
 **Details**
@@ -316,11 +259,11 @@ Locale message translation
 
 **Signature:**
 ```typescript
-$t(key: Path, defaultMsg: string, options: TranslateOptions): string;
+$t(key: Path, defaultMsg: string, options: TranslateOptions): TranslateResult;
 ```
 
 :::tip NOTE
-Supported for **Composition API mode only**.
+Supported for **Composition API mode only until v9. v10 or later can also be used in Legacy API mode**.
 :::
 
 **Details**
@@ -344,7 +287,7 @@ Locale message translation
 
 **Signature:**
 ```typescript
-$t(key: Path, list: unknown[]): string;
+$t(key: Path, list: unknown[]): TranslateResult;
 ```
 
 **Details**
@@ -367,11 +310,11 @@ Locale message translation
 
 **Signature:**
 ```typescript
-$t(key: Path, list: unknown[], plural: number): string;
+$t(key: Path, list: unknown[], plural: number): TranslateResult;
 ```
 
 :::tip NOTE
-Supported for **Composition API mode only**.
+Supported for **Composition API mode only until v9. v10 or later can also be used in Legacy API mode**.
 :::
 
 **Details**
@@ -395,11 +338,11 @@ Locale message translation
 
 **Signature:**
 ```typescript
-$t(key: Path, list: unknown[], defaultMsg: string): string;
+$t(key: Path, list: unknown[], defaultMsg: string): TranslateResult;
 ```
 
 :::tip NOTE
-Supported for **Composition API mode only**.
+Supported for **Composition API mode only until v9. v10 or later can also be used in Legacy API mode**.
 :::
 
 **Details**
@@ -423,11 +366,11 @@ Locale message translation
 
 **Signature:**
 ```typescript
-$t(key: Path, list: unknown[], options: TranslateOptions): string;
+$t(key: Path, list: unknown[], options: TranslateOptions): TranslateResult;
 ```
 
 :::tip NOTE
-Supported for **Composition API mode only**.
+Supported for **Composition API mode only until v9. v10 or later can also be used in Legacy API mode**.
 :::
 
 **Details**
@@ -451,7 +394,7 @@ Locale message translation
 
 **Signature:**
 ```typescript
-$t(key: Path, named: NamedValue): string;
+$t(key: Path, named: NamedValue): TranslateResult;
 ```
 
 **Details**
@@ -474,11 +417,11 @@ Locale message translation
 
 **Signature:**
 ```typescript
-$t(key: Path, named: NamedValue, plural: number): string;
+$t(key: Path, named: NamedValue, plural: number): TranslateResult;
 ```
 
 :::tip NOTE
-Supported for **Composition API mode only**.
+Supported for **Composition API mode only until v9. v10 or later can also be used in Legacy API mode**.
 :::
 
 **Details**
@@ -502,11 +445,11 @@ Locale message translation
 
 **Signature:**
 ```typescript
-$t(key: Path, named: NamedValue, defaultMsg: string): string;
+$t(key: Path, named: NamedValue, defaultMsg: string): TranslateResult;
 ```
 
 :::tip NOTE
-Supported for **Composition API mode only**.
+Supported for **Composition API mode only until v9. v10 or later can also be used in Legacy API mode**.
 :::
 
 **Details**
@@ -530,11 +473,11 @@ Locale message translation
 
 **Signature:**
 ```typescript
-$t(key: Path, named: NamedValue, options: TranslateOptions): string;
+$t(key: Path, named: NamedValue, options: TranslateOptions): TranslateResult;
 ```
 
 :::tip NOTE
-Supported for **Composition API mode only**.
+Supported for **Composition API mode only until v9. v10 or later can also be used in Legacy API mode**.
 :::
 
 **Details**

docs/guide/migration/breaking.md

@@ -1,4 +1,4 @@
-# Breaking Changes
+# Breaking Changes in v9
 
 Most of the APIs offered in Vue I18n v9 (for Vue 3) strive to maintain compatibility, to ease the pain of migration from v8 (for Vue 2). But there are still a few breaking changes that you might encounter while migrating your application. This guide is how to adapt your application to make it work with Vue I18n v9.