From 83af723ac521adef2cd8b48fec9745a60c051047 Mon Sep 17 00:00:00 2001
From: bholmesdev <hey@bholmes.dev>
Date: Fri, 17 Mar 2023 17:56:13 -0400
Subject: [PATCH] fix: properly show mdoc errors in overlay

---
 packages/astro/src/core/errors/dev/vite.ts | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/packages/astro/src/core/errors/dev/vite.ts b/packages/astro/src/core/errors/dev/vite.ts
index 1ae467c2c7..51611c1997 100644
--- a/packages/astro/src/core/errors/dev/vite.ts
+++ b/packages/astro/src/core/errors/dev/vite.ts
@@ -125,6 +125,7 @@ export interface AstroErrorPayload {
 // Shiki does not support `mjs` or `cjs` aliases by default.
 // Map these to `.js` during error highlighting.
 const ALTERNATIVE_JS_EXTS = ['cjs', 'mjs'];
+const ALTERNATIVE_MD_EXTS = ['mdoc'];
 
 /**
  * Generate a payload for Vite's error overlay
@@ -158,6 +159,9 @@ export async function getViteErrorPayload(err: ErrorWithMetadata): Promise<Astro
 	if (ALTERNATIVE_JS_EXTS.includes(highlighterLang ?? '')) {
 		highlighterLang = 'js';
 	}
+	if (ALTERNATIVE_MD_EXTS.includes(highlighterLang ?? '')) {
+		highlighterLang = 'md';
+	}
 	const highlightedCode = err.fullCode
 		? highlighter.codeToHtml(err.fullCode, {
 				lang: highlighterLang,