fix: emulate event.platform even if route is undefined (#12513)

* fix: in dev, emulate event.platform even if route is undefined * chore: add .changeset * Update .changeset/shiny-suns-scream.md Co-authored-by: Tee Ming <chewteeming01@gmail.com> * fix: suggest apply Co-authored-by: Tee Ming <chewteeming01@gmail.com> * fix: suggest apply Co-authored-by: Tee Ming <chewteeming01@gmail.com> * chore: format * Update .changeset/shiny-suns-scream.md --------- Co-authored-by: Tee Ming <chewteeming01@gmail.com>
sveltejs · Sep 5, 2024 · 109722c · 109722c
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diff --git a/.changeset/shiny-suns-scream.md b/.changeset/shiny-suns-scream.md
@@ -0,0 +1,5 @@
+---
+'@sveltejs/kit': patch
+---
+
+fix: emulate `event.platform` even when the route does not exist
diff --git a/packages/kit/src/runtime/server/respond.js b/packages/kit/src/runtime/server/respond.js
@@ -298,6 +298,11 @@ export async function respond(request, options, manifest, state) {
 					event.platform = await state.emulator.platform({ config, prerender });
 				}
 			}
+		} else if (state.emulator?.platform) {
+			event.platform = await state.emulator.platform({
+				config: {},
+				prerender: !!state.prerendering?.fallback
+			});
 		}
 
 		const { cookies, new_cookies, get_cookie_header, set_internal } = get_cookies(