e2e: add vite client build (#4643)

e2e/smoke/test/fixtures/vite/package.json

@@ -0,0 +1,13 @@
+{
+  "name": "vite",
+  "private": true,
+  "scripts": {
+    "build": "vite build"
+  },
+  "dependencies": {
+    "better-auth": "workspace:*"
+  },
+  "devDependencies": {
+    "vite": "^7.1.5"
+  }
+}

e2e/smoke/test/fixtures/vite/src/client.ts

@@ -0,0 +1,8 @@
+/// <reference types="vite/client" />
+export * from "better-auth/client/plugins";
+import { createAuthClient } from "better-auth/client";
+
+export const authClient = createAuthClient({
+	baseURL: import.meta.env.VITE_BASE_URL || "http://localhost:3000",
+	plugins: [],
+});

e2e/smoke/test/fixtures/vite/tsconfig.json

@@ -0,0 +1,11 @@
+{
+  "compilerOptions": {
+    "target": "esnext",
+    "module": "esnext",
+    "moduleResolution": "bundler",
+    "esModuleInterop": true,
+    "forceConsistentCasingInFileNames": true,
+    "strict": true,
+    "skipLibCheck": true
+  }
+}

e2e/smoke/test/fixtures/vite/vite.config.ts

@@ -0,0 +1,19 @@
+import { defineConfig } from "vite";
+import { resolve } from "node:path";
+
+export default defineConfig({
+	build: {
+		rollupOptions: {
+			input: {
+				client: resolve(__dirname, "src", "client.ts"),
+			},
+			output: {
+				entryFileNames: "[name].js",
+				format: "es",
+			},
+			treeshake: false,
+		},
+		minify: false,
+		sourcemap: "inline",
+	},
+});

e2e/smoke/test/vite.spec.ts

@@ -0,0 +1,52 @@
+import { describe, it } from "node:test";
+import { fileURLToPath } from "node:url";
+import { join } from "node:path";
+import { spawn } from "node:child_process";
+import { readFile } from "node:fs/promises";
+import * as assert from "node:assert";
+
+const fixturesDir = fileURLToPath(new URL("./fixtures", import.meta.url));
+
+describe("(vite) client build", () => {
+	it("builds client without better-call imports", async () => {
+		const viteDir = join(fixturesDir, "vite");
+
+		// Run vite build
+		const buildProcess = spawn("npx", ["vite", "build"], {
+			cwd: viteDir,
+			stdio: "pipe",
+		});
+
+		// Wait for build to complete
+		await new Promise<void>((resolve, reject) => {
+			buildProcess.on("close", (code) => {
+				if (code === 0) {
+					resolve();
+				} else {
+					reject(new Error(`Vite build failed with code ${code}`));
+				}
+			});
+
+			buildProcess.on("error", (error) => {
+				reject(error);
+			});
+
+			// Log build output for debugging
+			buildProcess.stdout.on("data", (data) => {
+				console.log(data.toString());
+			});
+
+			buildProcess.stderr.on("data", (data) => {
+				console.error(data.toString());
+			});
+		});
+
+		const clientFile = join(viteDir, "dist", "client.js");
+		const clientContent = await readFile(clientFile, "utf-8");
+
+		assert.ok(
+			!clientContent.includes("createEndpoint"),
+			"Built output should not contain 'better-call' imports",
+		);
+	});
+});

e2e/smoke/tsconfig.json

@@ -8,5 +8,6 @@
     "strict": true,
     "skipLibCheck": true,
     "moduleResolution": "node16"
-  }
+  },
+  "include": ["./test/**/*"]
 }

pnpm-lock.yaml

@@ -644,6 +644,16 @@ importers:
         specifier: 4.33.2
         version: 4.33.2(@cloudflare/workers-types@4.20250903.0)
 
+  e2e/smoke/test/fixtures/vite:
+    dependencies:
+      better-auth:
+        specifier: workspace:*
+        version: link:../../../../../packages/better-auth
+    devDependencies:
+      vite:
+        specifier: ^7.1.5
+        version: 7.1.5(@types/node@24.4.0)(jiti@2.6.0)(less@4.4.1)(lightningcss@1.30.1)(sass@1.90.0)(terser@5.44.0)(tsx@4.20.5)(yaml@2.8.1)
+
   packages/better-auth:
     dependencies:
       '@better-auth/utils':
@@ -15971,9 +15981,7 @@ snapshots:
       metro-runtime: 0.83.1
     transitivePeerDependencies:
       - '@babel/core'
-      - bufferutil
       - supports-color
-      - utf-8-validate
     optional: true
 
   '@react-native/normalize-colors@0.79.6': {}