fix(config): handle boolean server.allowedHosts (#13437)

Vardhaman619 · ematipico · web-flow · commit 013fa87982ea · 2025-03-18T09:07:28.000Z
Co-authored-by: ematipico &lt;602478+ematipico@users.noreply.github.com&gt;
diff --git a/.changeset/bitter-rockets-pull.md b/.changeset/bitter-rockets-pull.md
@@ -0,0 +1,5 @@
+---
+'astro': minor
+---
+
+Handle server.allowedHosts when the value is true without attempting to push it into an array.
diff --git a/packages/astro/src/core/config/merge.ts b/packages/astro/src/core/config/merge.ts
@@ -40,6 +40,11 @@ function mergeConfigRecursively(
 			}
 		}
 
+		// for server.allowedHosts, if the value is a boolean
+		if (key === 'allowedHosts' && rootPath === 'server' && typeof existing === 'boolean') {
+			continue;
+		}
+
 		if (key === 'data' && rootPath === 'db') {
 			// db.data can be a function or an array of functions. When
 			// merging, make sure they become an array

Original file line number	Diff line number	Diff line change
`@@ -40,6 +40,11 @@ function mergeConfigRecursively(`
`40`	`40`	`}`
`41`	`41`	`}`
`42`	`42`
	`43`	`+ // for server.allowedHosts, if the value is a boolean`
	`44`	`+ if (key === 'allowedHosts' && rootPath === 'server' && typeof existing === 'boolean') {`
	`45`	`+ continue;`
	`46`	`+ }`
	`47`	`+`
`43`	`48`	`if (key === 'data' && rootPath === 'db') {`
`44`	`49`	`// db.data can be a function or an array of functions. When`
`45`	`50`	`// merging, make sure they become an array`