[adapter-vercel] Make all root routes be called index instead of an…

… empty string (#4731) * [adapter-vercel] Make all root routes be called `index` instead of an empty string * Add changeset * Update packages/adapter-vercel/index.js * Update packages/adapter-vercel/index.js * Update .changeset/shiny-needles-divide.md Co-authored-by: Conduitry <git@chor.date> Co-authored-by: Rich Harris <hello@rich-harris.dev> Co-authored-by: Conduitry <git@chor.date>
sveltejs · Apr 25, 2022 · 6821d64 · 6821d64
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diff --git a/.changeset/shiny-needles-divide.md b/.changeset/shiny-needles-divide.md
@@ -0,0 +1,5 @@
+---
+'@sveltejs/adapter-vercel': patch
+---
+
+Fix `edge: true, split: true` build error for root routes when deploying to Vercel
diff --git a/packages/adapter-vercel/index.js b/packages/adapter-vercel/index.js
@@ -340,7 +340,7 @@ async function v3(builder, external, edge, split) {
 						.slice(1, -2) // remove leading / and trailing $/
 						.replace(/\\\//g, '/')}(?:/__data.json)?$`; // TODO adding /__data.json is a temporary workaround — those endpoints should be treated as distinct routes
 
-					await generate_function(route.id, src, entry.generateManifest);
+					await generate_function(route.id || 'index', src, entry.generateManifest);
 				}
 			};
 		});