fix: picture fallback check (withastro#10783)

PeterDraex · Apr 23, 2024 · 43d693c · 43d693c
1 parent 983abc8
commit 43d693c
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diff --git a/.changeset/modern-mugs-raise.md b/.changeset/modern-mugs-raise.md
@@ -0,0 +1,5 @@
+---
+"astro": patch
+---
+
+Fixes Picture component specialFormatsFallback fallback check
diff --git a/packages/astro/components/Picture.astro b/packages/astro/components/Picture.astro
@@ -45,7 +45,7 @@ let resultFallbackFormat = fallbackFormat ?? defaultFallbackFormat;
 if (
 	!fallbackFormat &&
 	isESMImportedImage(originalSrc) &&
-	originalSrc.format in specialFormatsFallback
+	(specialFormatsFallback as ReadonlyArray<string>).includes(originalSrc.format)
 ) {
 	resultFallbackFormat = originalSrc.format;
 }