fix: picture fallback check (#10783)

withastro · Apr 15, 2024 · 4dbd545 · 4dbd545
1 parent a4e7d66
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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;
 }