Fix next in types of transformer signature

Closes GH-149. Reviewed-by: Christian Murphy <christian.murphy.42@gmail.com>
unifiedjs · Jul 6, 2021 · 350ed9d · 350ed9d
1 parent 6ef3933
commit 350ed9d
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Showing 2 changed files with 7 additions and 8 deletions.
diff --git a/types/index.d.ts b/types/index.d.ts
@@ -313,11 +313,7 @@ export type Attacher<S extends any[] = [Settings?], P = Settings> = (
 export type Transformer = (
   node: Node,
   file: VFile,
-  next: (
-    error: Error | null,
-    tree?: Node,
-    file?: VFile
-  ) => Record<string, unknown>
+  next: (error?: Error | null, tree?: Node, file?: VFile) => void
 ) => Error | Node | Promise<Node> | void | Promise<void>
 
 /**

diff --git a/types/unified-tests.ts b/types/unified-tests.ts
@@ -165,24 +165,27 @@ processor.use(
     (
       tree: Node,
       file: VFile,
-      next: (error: Error | null, tree: Node, file: VFile) => {}
+      next: (error: Error | null, tree: Node, file: VFile) => void
     ) => {}
 )
 processor.use(
   () =>
     (
       tree: Node,
       file: VFile,
-      next: (error: Error | null, tree: Node) => {}
+      next: (error: Error | null, tree: Node) => void
     ) => {}
 )
 processor.use(
-  () => (tree: Node, file: VFile, next: (error: Error | null) => {}) => {}
+  () => (tree: Node, file: VFile, next: (error: Error | null) => void) => {}
 )
 processor.use(
   // $ExpectError
   () => (tree: Node, file: VFile, next: () => {}) => {}
 )
+processor.use(() => (tree: Node, file: VFile, next: () => void) => {
+  next()
+})
 
 processor.use(pluginWithTwoSettings)
 processor.use(pluginWithTwoSettings).use(pluginWithTwoSettings)