diff --git a/packages/compiler-sfc/__tests__/__snapshots__/compileScript.spec.ts.snap b/packages/compiler-sfc/__tests__/__snapshots__/compileScript.spec.ts.snap
index 47d401eeea7..34385f4476b 100644
--- a/packages/compiler-sfc/__tests__/__snapshots__/compileScript.spec.ts.snap
+++ b/packages/compiler-sfc/__tests__/__snapshots__/compileScript.spec.ts.snap
@@ -1261,6 +1261,21 @@ return () => {}
 }"
 `;
 
+exports[`SFC compile <script setup> > should compile JS syntax 1`] = `
+"export default {
+  setup(__props, { expose }) {
+  expose();
+
+      const a = 1
+      const b = 2
+      const c = 3
+      
+return { a, b, c }
+}
+
+}"
+`;
+
 exports[`SFC compile <script setup> > should expose top level declarations 1`] = `
 "import { x } from './x'
       
diff --git a/packages/compiler-sfc/__tests__/compileScript.spec.ts b/packages/compiler-sfc/__tests__/compileScript.spec.ts
index eed363bc031..8aaf69580a2 100644
--- a/packages/compiler-sfc/__tests__/compileScript.spec.ts
+++ b/packages/compiler-sfc/__tests__/compileScript.spec.ts
@@ -2,6 +2,18 @@ import { BindingTypes } from '@vue/compiler-core'
 import { compileSFCScript as compile, assertCode, mockId } from './utils'
 
 describe('SFC compile <script setup>', () => {
+  test('should compile JS syntax', () => {
+    const { content } = compile(`
+      <script setup lang='js'>
+      const a = 1
+      const b = 2
+      const c = 3
+      </script>
+    `)
+    expect(content).toMatch(`return { a, b, c }`)
+    assertCode(content)
+  })
+
   test('should expose top level declarations', () => {
     const { content, bindings } = compile(`
       <script setup>