From 7e07c8e8d8380a1891fa471e20deee73214dc47c Mon Sep 17 00:00:00 2001
From: bluwy <bjornlu.dev@gmail.com>
Date: Thu, 4 Nov 2021 20:41:22 +0800
Subject: [PATCH] fix: loosen preprocessor types

---
 src/compiler/preprocess/types.ts | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/compiler/preprocess/types.ts b/src/compiler/preprocess/types.ts
index 4ac441b5e6..af49705c25 100644
--- a/src/compiler/preprocess/types.ts
+++ b/src/compiler/preprocess/types.ts
@@ -19,8 +19,8 @@ export interface Processed {
 
 export type MarkupPreprocessor = (options: {
 	content: string;
-	filename: string;
-}) => Processed | Promise<Processed>;
+	filename?: string;
+}) => Processed | void | Promise<Processed | void>;
 
 export type Preprocessor = (options: {
 	/**
@@ -33,7 +33,7 @@ export type Preprocessor = (options: {
 	 */
 	markup: string;
 	filename?: string;
-}) => Processed | Promise<Processed>;
+}) => Processed | void | Promise<Processed | void>;
 
 export interface PreprocessorGroup {
 	markup?: MarkupPreprocessor;