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+---
+'astro': major
+---
+
+### [changed]: `RouteData.distURL` is now an array
+In Astro v4.x, `RouteData.distURL` was `undefined` or a `URL`
+
+Astro v5.0, `RouteData.distURL` is `undefined` or an array of `URL`. This was a bug, because a route can generate multiple files on disk, especially when using dynamic routes such as `[slug]` or `[...slug]`.
+
+#### What should I do?
+Update your code to handle `RouteData.distURL` as an array.
+
+```diff
+if (route.distURL) {
+-  if (route.distURL.endsWith('index.html')) {
+-    // do something
+-  }
++  for (const url of route.distURL) {
++    if (url.endsWith('index.html')) {
++      // do something
++    }
++  }
+}
+```